CN103016044A

CN103016044A - Comprehensive method of drilling, permeability increasing, repairing and gas-driven displacing of drill hole underground coal mine

Info

Publication number: CN103016044A
Application number: CN2012104899101A
Authority: CN
Inventors: 苏现波; 刘晓; 王建国; 马宝安; 马耕; 张双斌
Original assignee: Henan University of Technology
Current assignee: Henan University of Technology
Priority date: 2012-11-27
Filing date: 2012-11-27
Publication date: 2013-04-03
Anticipated expiration: 2032-11-27
Also published as: CN103016044B

Abstract

The invention discloses a comprehensive method of drilling, permeability increasing, repairing and gas-driven displacing of a drill hole underground a coal mine. The comprehensive method comprises the following four process steps of drilling a drill hole, increasing the permeability of a coal bed, repairing the drill hole and increasing permeability driven by gas. The comprehensive method can be used for realizing continuous drilling and remote operating and has the advantages of being simple in construction, smooth in slagging, and quick in drilling speed and the like; an operator is far away from a construction site during a construction process, so that the labor environment of workers is improved, dangerous accidents are reduced and prevented and the personal safety of operators can be effectively guaranteed. The coal bed can be subjected to the action of the following measures such as hydraulic cutting, fracturing and punching and the like, so that the permeability coefficient of the coal bed can be greatly and uniformly improved, and stress concentration caused by hydraulic operation can be explained by following a certain pattern; and drilling repair on the existing collapsed drill hole and water accumulation drill hole can be performed, so that the service life of drill holes is prolonged, and the effective extraction quality of the drill holes is improved; and meanwhile, on the basis of increasing the permeability and repairing of the drill hole, if the later-stage extraction effect is not obvious, a gas driving process can be adopted to improve mashgas extraction efficiency.

Description

The creeping into of coal mine down-hole drilling, anti-reflection, reparation and gas drive displacement integrated approach

Technical field

The invention belongs to the Coal-seam Gas Recovery Technologies field, particularly the creeping into of a kind of coal mine down-hole drilling, anti-reflection, reparation and gas drive displacement integrated approach.

Background technology

The China's coal-mine Gas Disaster is serious, is seriously restricting the safety in production of coal enterprise.Gas pumping is the technical way that China carries out gas control at present, but because China coal seam is soft, complexity is deposited in tax, have bit freezing, crown drill in the drilling process, fall to bore, drilling rod connects difficulty, deslagging is untimely to be difficult to pull out the phenomenon such as brill, is restricting coal bed drilling rate of penetration and quality; Permeability Coefficent in Coal Seam plays decisive role to the gas pumping effect, and most of high gas and outburst mine of China all belongs to low permeability coal seam, has determined the most of mine extraction difficulty of China, and low, the effective extraction time of single hole extraction amount is short.In addition, As time goes on, also there is the possibility of the hole of collapsing, ponding, increase gas starting pressure gradient in mash gas pumping drilling, had a strong impact on the quality and quantity of coal bed drilling gas pumping, it is on schedule up to standard that the gas pumping extinction is difficult to, even do not have boring up to standard just to cave in, can only be with the complement as a supplement measure of holing.

For above situation, China at present existing many high-power rigs in succession researches and develops and puts in the production application, but does not realize that still drilling rod creeps into continuously, the functions such as timely deslagging of holing.

China's coal-bed gas is administered crucial the anti-reflection of coal seam that be, the coal seam is anti-reflection mainly take the waterpower measure as main at present, as fracturing, hydraulic flushing in hole, waterpower extrude, high pressure water injection etc., also have in addition loosening blasting, air displacement etc., although obtained certain achievement, but owing to be subjected to the impact that is difficult to factors such as handling (huge, the complicated operations of equipment volume) of the complexity that technology uses (that open in the crack is inhomogeneous, stress concentrate chaotic etc.) and equipment, all do not apply on a large scale.

Owing to be subjected to the impact of the factors such as overburden pressure, mining induced stress, gas pressure, coal rock layer crevice water and Coal Pore Structure, intensity, As time goes on, extraction borehole can occur in varying degrees collapsing, the problem such as ponding, cause extraction inefficiency even calcellation, had a strong impact on extinction plan and the production deployment of mine.For solving the collapse problem of hole, ponding of boring after the long-time extraction, mainly be to lean against to be pressed into high-pressure blast (mine compressed air pipe air feed in the boring at present, blast≤0.7MPa) carries out deslagging, open-work, can obtain certain effect less than 15m, inclination angle less than 10 ° angle of depression boring for hole length, because hydraulic pressure, blast force value are limited, long and high inclination-angle is holed and is not but had the purpose of deslagging, open-work to macropore.Simultaneously, do not have yet the some strength instrument can pierce continuously cave in boring within, therefore, the open-work inefficiency, often again construction drill to remedy.

Summary of the invention

The invention provides a kind ofly be convenient to implement, the creeping into of the coal mine down-hole drilling of process, anti-reflection, reparation and gas drive displacement integrated approach.

For achieving the above object, technical scheme of the present invention is: the creeping into of a kind of coal mine down-hole drilling, anti-reflection, reparation and gas drive displacement integrated approach, it is characterized in that, and finish successively following steps by mining water power working rig:

A, creep into

1) measure boring head-room of living in, determine boring perforate height, hole length, inclination angle and azimuth, place's coal (rock) body structure is crept in observation, tests its mechanical strength;

2) mining water power working rig is transported to the drilling construction place, and it is firm to be fixed;

3) according to boring perforate height, hole length, inclination angle and azimuth designing requirement, adjust height and the angle of mining water power working rig, keep consistent with boring perforate direction;

4) according to coal (rock) body structure of observation and the mechanical strength of test, select the Water jet sprayer of mining water power working rig, required injection pressure and flow when calculating the work of mining water power working rig;

5) creep in the operating location 200m scope and remove the people, open clean water pump station, the Long-distance Control button of mining water power working rig, make the defeated pipe device work of mining water power working rig, the continuous flexible steel pipe moves to predetermined drilling orifice position in the drop-down direct join of drive of defeated pipe device;

6) flow of adjusting clean water pump station and pressure is to the broken rock pressure versus flow of estimating, draining, deslagging situation when the video camera observation of laying according to the bore operation scene is crept into, and control accordingly the speed of creeping into, and rate of penetration is 1m/(1 ~ 2) min;

Stop to creep into when 7) creeping into operation complete design hole length, close clean water pump station, open hydraulic power unit, make the cylinder backward rotation of mining water power working rig, withdraw from boring and be wrapped on the cylinder to drive flexible pipe, if there is the situation of boring difficulty of moving back, can open clean water pump station to the current of flexible pipe injection than low discharge and pressure, clean boring by Water jet sprayer, so that the residue in the boring is discharged, realize moving back smoothly brill;

8) move back brill and finish, can carry out creeping into of next boring;

B, the coal seam is anti-reflection

1) fixing mining water power working rig before boring, and definite flexible pipe height, inclination angle and the azimuth of creeping into, determine the required pressure versus flow of Water jet sprayer, water jet pressure is at least 1.5 times of coal rock strength, open mining water power working rig, under the effect of defeated pipe device, flexible pipe and Water jet sprayer delivered to drilling hole at the bottom of, close mining water power working rig;

2) open clean water pump station, coal and rock forms jet groove and local cracks under Water Jet Impact, observes and returns water, deslagging situation, reaches to close clean water pump station after the flexible pipe water under high pressure is estimated to inject flow and pressure 10min;

3) hydraulic power unit of unlatching mining water power working rig drives the cylinder backward rotation, makes flexible pipe retreat 10m, repeats the step 2 in the anti-reflection process in coal seam);

4) step 3) in the anti-reflection process in repetition coal seam is until Water jet sprayer forms uniform jet groove and opens the crack with dark boring apart from drilling orifice 20m;

5) pressure and the flow of increasing injected water fluid jet nozzle, the bed drain purge of boring is increased, limited space between flexible pipe and the drill hole inner wall, the deslagging limited speed, coal, rock dust slag are deposited in drilling orifice and are difficult to timely discharge, thereby realize the purpose of shutoff boring, again strengthen pressure and the flow of injected water fluid jet nozzle, realize the fracturing function, most of crack of fracturing unlatching this moment all is that the jet groove that the edge forms is before opened and extension, thereby has formed even fixed point, even pressure break;

C, boring are repaired

1) adjusts mining waterpower equalization machine, make Water jet sprayer reach design work height and inclination angle;

2) the adjusting directive wheel of adjustment aligning mechanism makes the continuous steel pipe alignment;

3) start clean water pump station, water under high pressure cuts the rock ore body of boring to be repaired through flexible pipe injected water fluid jet nozzle through the cutting injection stream;

4) start defeated pipe device, and adjust the fltting speed of flexible pipe, normally creep into;

Water jet sprayer begins to retreat when 5) creeping at the bottom of the hole, open hydraulic power unit, make the cylinder backward rotation of mining water power working rig, slowly regain flexible pipe, meanwhile, water under high pressure enters boring enforcement punching operation with the path of step 3) in the boring repair process, turns to operation or work standard to rush the coal output maximum;

D, gas drive is anti-reflection

1) select the boring of gas pumping weak effect as implementing the hole, and get rid of the poor boring of extracting result that collapse hole or ponding cause, open drainage tube, the flexible pipe of mining water power working rig is transferred at the bottom of the drilling hole by defeated pipe device, and drilling orifice sealed, medium in the clean water pump station is changed to gas, gas injection in the flexible pipe;

2) the gas pumping amount of hole periphery boring is implemented in metering, observes its gas extraction flow before, during and after gas injection and the situation of change of concentration;

3) open clean water pump station, high pressure gas is sent at the bottom of the hole by flexible pipe, because orifice sealing, boring internal pressure value constantly rises, when injection pressure in the hole is higher than the expectation injection pressure, increase the injected gas volume in the flexible pipe, injection pressure increases, when injection pressure increases to design pressure 120%, keep constant injected gas volume;

4) gas in the coal body flows to the periphery boring of implementing the hole, to improve this zone gas pumping effect under the driving displacement of injecting high pressure gas;

5) measure the extraction changes in flow rate situation of the periphery boring in Statistics Implementation hole, in the extraction borehole that extraction flow and concentration increase, with the enforcement pitch-row be gas drive radius under this injected gas volume from farthest spacing.

Described mining water power working rig comprises main frame, carries out platform, clean water pump station, hydraulic power unit and switchboard, carry out in the platform flexible pipe controller and water under high pressure controller are installed, main frame links to each other with the flexible pipe controller, links to each other with the water under high pressure controller by water pipe by oil pipe, the flexible pipe controller links to each other with hydraulic power unit by oil pipe, the water under high pressure controller links to each other with clean water pump station by water pipe, carries out platform, clean water pump station and hydraulic power unit and is electrically connected with switchboard by power cable respectively; Described main frame comprises the hoist cylinder of sledge shape base and the side-inverted of sledge shape base, and hoist cylinder is equipped with cover by the left support abutment on its sidewall and right support abutment and moves footpath tumbler cylinder main shaft, and hoist cylinder is connected with oil pipe between main frame and the execution platform; Cover moves footpath tumbler cylinder main shaft one end and is provided with the water under high pressure passage, and the import and export of water under high pressure passage are respectively equipped with water under high pressure tube connector and water under high pressure joint, and the water under high pressure tube connector is connected with water pipe between main frame and the execution platform; Cover moves tumbler cylinder main shaft both sides, footpath and is provided with left support arm and right support arm, and left support arm and right support arm front end are provided with defeated pipe device; Left support arm and right support arm front end also are equipped with closed tube hydraulic motor, hydraulic clutch and reducer, closed tube hydraulic motor and main frame and the oil pipe of carrying out between the platform are connected, the reducer output is provided with drive sprocket, cover moves footpath tumbler cylinder main shaft and is provided with the driven sprocket corresponding with drive sprocket, and drive sprocket and driven sprocket are provided with chain; Cover moves footpath tumbler cylinder main shaft and is provided with cylinder, is wound with flexible pipe on the cylinder, and Water jet sprayer is installed on the flexible pipe, and flexible pipe one end stretches in the defeated pipe device, the other end links to each other with the water under high pressure joint by high-pressure hose; Defeated pipe device defeated pipe direction and cylinder excircle are tangent.

Described cover moves footpath tumbler cylinder main shaft and comprises the splined shaft with sliding tray, reciprocal axle, slippage cover, spline housing and spindle nose, and spline housing is sheathed on the splined shaft outside, and spline housing is connected by cylinder hoop and cylinder, and spindle nose is fixed on the splined shaft right side; Slippage cover and splined shaft endoporus matched in clearance, the slippage cover is set on the reciprocal axle, back and forth axle is provided with left-hand screw groove and the right spiral that the end communicates, and slippage puts and offers slider bore, is provided with slide block in the slider bore, slider top is provided with slide key, slide key and left-hand screw groove and right spiral are slidingly matched, and offer square hole on the spline housing, are provided with the slide block set that is sheathed on the slide block outside in the square hole, slide block set is fixed in slippage by screw and puts, and the sliding tray of slide block set and splined shaft is slidingly matched; Back and forth the right-hand member of axle passes spindle nose, spindle nose is positioned at right support abutment, is installed with the first gear on the spindle nose end face, and back and forth the axle outer end is provided with the second gear, the first gear and the second gear one side are provided with duplicate gear, and duplicate gear is meshed with the first gear and the second gear respectively.

Be provided with stage clip and steel ball in the described slide block, jackscrew is pressed on the stage clip by the steel ball top.

Described defeated pipe device comprise arrange on transmission case body, upper cover plate, lower cover and the lower cover put pipe hydraulic motor and hydraulic clutch, put the pipe hydraulic motor and be connected with oil pipe between main frame and the execution platform; Be provided with side by side the chain on two pairs of sprocket wheels and the every pair of sprocket wheel in the transmission case body, wherein a sprocket wheel in the pair of sprocket is provided with drive sprocket axle, another is provided with the driven chain wheel shaft to a sprocket wheel in the sprocket wheel, drive sprocket axle is provided with driving gear, the driven chain wheel shaft is provided with the driven gear that is meshed with driving gear, and the drive sprocket axle outer end drives with hydraulic clutch and is connected; The chain outside is fixed with fixture block by little bent plate, and the fixture block outside is provided with groove, forms the defeated tube chamber that contains flexible pipe between the relative fixture block of lateral surface.

Described transmission case body bottom is provided with track by fixed block, and fixed block is provided with the adjustment screw that withstands on the track side surfaces, and top, track another side is pressed in the chain inboard.

Described support arm and cover move between the tumbler cylinder main shaft of footpath and are provided with adjusted device, and the tuning center of support arm overlaps with the center of rotation that cover moves footpath tumbler cylinder main shaft; Adjusted device comprises the copper sheathing of spindle nose outside and the ring gear of copper sheathing outside, the outer circumference surface of ring gear and right support arm are connected, be provided with the pinion shaft with the ring gear engagement in the right support abutment, the end of pinion shaft is provided with turbine, turbine is meshed with the worm screw that stretches to the right support abutment outside, the outside tuning hydraulic motor that connects of worm screw, the tuning hydraulic motor is connected with oil pipe between main frame and the execution platform.

Described flexible pipe controller is flexible pipe Long-distance Control instrument, it comprises on proportional flow direction combination valve peculiar to vessel and the proportional flow direction combination valve peculiar to vessel by the fixing indication panel of junction plate, be connected with action bars by the reversing swinging moving axis on the proportional flow direction combination valve peculiar to vessel, offer chute on the action bars, motor and reductor are installed on the junction plate, the output shaft of motor and reductor is positioned at the indication panel centre position, the output shaft of motor and reductor is provided with crank, the crank other end is equipped with slide-bar, and slide-bar and chute are slidingly matched.

Described water under high pressure controller is water under high pressure Long-distance Control instrument, it comprises the indicating dial that arranges by adapter sleeve on high-pressure water valve and the high-pressure water valve, the motor and the reductor that are positioned at the indicating dial rear portion are installed above the adapter sleeve, and the output of motor and reductor is positioned at the indicating dial center; The output of motor and reductor is provided with pointer and crank, and the crank other end is hinged with connecting rod by bearing pin, and the connecting rod other end is hinged mutually by the slide valve lever of rotating shaft with high-pressure water valve.

Described mining water power working rig also comprises the remote console that is made of Long-distance Control button and display instrument, remote console is electrically connected with switchboard by power cable and control signal cable, and display instrument is connected with monitoring host computer by holding wire and carries out the video camera of platform.

Compared with prior art, the present invention has following advantage:

1, the present invention includes creep into, the coal seam is anti-reflection, boring is repaired and anti-reflection four processing steps of gas drive, can realize creeping into continuously, operated from a distance, have the advantages such as easy construction, deslagging is smooth and easy, rate of penetration is fast, and operating personnel are away from the job site in the work progress, improve the worker laboring environment, reduce and prevent the generation of peril, operating personnel's personal safety can obtain effective guarantee; Can carry out to the coal seam measures such as hydraulic slotted liner technique, pressure break, punching, can significantly improve uniformly the permeability coefficient in coal seam, the stress that the waterpower equalization is caused is concentrated regular following, also can be to the existing boring of caving in, the wet hole reparation of holing, increase the application life of holing, improve the quality of the effective extraction of boring; In the boring repair process, creep on realization deslagging limit, limit, and remediation efficiency is high, and after open-work was finished, being changed by water under high pressure was high-pressure blast, and high-pressure blast with the open-work water discharge in the boring of the angle of depression, can improve hole pumping and mining efficient by flexible pipe greatly.Simultaneously, not obvious such as the later stage extracting result on the basis of anti-reflection and reparation of holing, then can adopt gas drive technique, improve gas pumping efficient.By above creeping into-anti-reflection-reparation-gas drive step, realize novel process and the method for control of coalmine gas.

2, mining water power working rig compact conformation, greatly simplified the structure of working rig, become hole site and direction under the adjustable mine of economizing on coal, can adapt under the mine to the comprehensive demand of carrying out pore-forming, dredging the job executions such as hole, reaming, slot, pressure break, working stability, safe and reliable, it is little to take up room, and the occasion that is very suitable for the inferior narrow space of coal mine is used; The video camera of remote console with the field operation scene information in the service tunnel and carry out execution indication on the platform and display instrument that meter information is transferred to remote setting on, the image information operating remote action button of operating personnel by showing, control signal is sent to switchboard, realization is to the start-stop control of clean water pump station and hydraulic power unit, realize simultaneously carrying out the dynamic Control of platform, and to carrying out proportional flow direction combination valve peculiar to vessel and the high-pressure water valve travel direction in the platform, the control of pressure versus flow, assurance is put pipe to working rig, the closed tube action, speed and high pressure water switch and pressure flow size are accurately controlled, both can be with regard near operation, can realize accurate Long-distance Control again, automaticity is high, for providing reliable equipment, coal mine downhole safety production guarantees, simultaneously can be implemented in the breakthrough that the high-pressure hydraulic construction operation is carried out in the deathtrap, greatly improve the safety factor of construction operation.

3, the working rig support adopts base and hoist cylinder, and support and elevating mechanism are integrated, and is so that the working rig structure is compacter, reliable and stable during work; The hoist cylinder synchronization lifting can realize that main frame carries out operation in the differing heights position; Adjusted device can make the right support arm rotate, and adjusts direction thereby drive defeated pipe device around the axis of cylinder, remains that the defeated pipe direction of defeated pipe device is consistent with the tangential direction of cylinder, to realize that main frame carries out operation at Difference angles.

4, reciprocal axle is set in splined shaft, can make cylinder in rotating in same direction, realize axially reciprocating, remain consistent with the defeated tube hub line of defeated pipe device on left and right directions when flexible pipe moves along the excircle tangential direction of cylinder, thereby the different-diameter flexible pipe is realized that multilayer order twines, realize the orderly folding and unfolding action of flexible pipe.

5, the hydraulic synchronization loop is to putting pipe hydraulic motor fuel feeding, and hydraulic clutch closes, and fixture block clamping flexible pipe is outwards carried, meanwhile, the closed tube hydraulic motor is fuel feeding not, and hydraulic clutch separates, cylinder is passive rotation under the pulling of flexible pipe, finishes to put the pipe action; Otherwise, to closed tube hydraulic motor fuel feeding, hydraulic clutch closes, in chain-driving bottom roll active backward rotation, on cylinder, twine flexible pipe, meanwhile, put not fuel feeding of pipe hydraulic motor, hydraulic clutch separates, and flexible pipe drives fixture block and chain counter motion, finish the closed tube action, advance or recovery operation easy, flexible pipe can be implemented in main passive movement and forward and reverse being synchronized with the movement in defeated pipe device in the cylinder, so that put pipe and the closed tube motion is flexible, be convenient to control, action is precisely reliable.

When 6, cylinder rotates, can make splined shaft and reciprocal axle produce outer corner difference, by changing gear-driven gear parameter, can realize the outer corner difference that needs; The outer corner difference that exists between splined shaft and the reciprocal axle is so that slide key relative sliding in left-hand screw groove or right spiral, thereby cylinder is moved axially, since back and forth the left-hand screw groove on the axle and right spiral be left-right rotary to helicla flute, and communicate at two ends, the left and right sides, when slide block moves to the end in the left-hand screw groove, slide key changes right spiral automatically over to, can realize automatic reverse, and vice versa; Move axially when can effectively guarantee drum rotating, when moving along the cylinder tangential direction, flexible pipe on left and right directions, remains consistent with the defeated tube hub line of defeated pipe device, can guarantee winding or the release movement rule, stable of flexible pipe on cylinder, can realize working continuously, creep into, be interrupted to withdraw to become section by section and creep into continuously and withdraw from continuously so that bore mode is interrupted section by section by drilling rod, greatly improved operating efficiency.In addition, can when making drum rotating one circle, move axially the distance of flexible pipe diameter by selecting different pitch and the transmission mechanisms of helicla flute on the reciprocal axle, realize flexible pipe winding of single layer or multi-lay winding.

7, be provided with track in transmission case body bottom, the top, a side of track is pressed in the inboard of chain, but the stretching chain prevents from that chain is lax to cause flexible pipe to skid that it is accurately errorless to guarantee to put the pipe action.

8, be provided with stage clip in slide block, jackscrew is pressed on the stage clip by the ball top, and under the stage clip effect, slide key remains with left-hand screw groove or right spiral and is slidingly matched, to be implemented in neatly conversion direction of left-right rotary turn trough two ends.

Description of drawings

Fig. 1 is the structural representation of the mining water power working rig that adopts of the present invention;

Fig. 2 is the structural representation of main frame among Fig. 1;

Fig. 3 is the left view of Fig. 2;

Fig. 4 is the right view of Fig. 2;

Fig. 5 is that Fig. 2 axis moves the structural representation that the footpath turns drum shaft;

Fig. 6 is the structural representation of defeated pipe device among Fig. 2;

Fig. 7 is the generalized section of Fig. 6;

Fig. 8 is the structural representation of flexible pipe Long-distance Control instrument among Fig. 1;

Fig. 9 is the structural representation of Fig. 1 mesohigh water Long-distance Control instrument.

The specific embodiment

As shown in Figure 1, mining water power working rig comprises main frame 1, carries out platform 3, clean water pump station 4, hydraulic power unit 5 and switchboard 6, carrying out platform 3 is electrically connected with switchboard 6 respectively by power cable 16 by power cable 15, hydraulic power unit 5 by power cable 14, clean water pump station 4, clean water pump station 4 can use Tao Li, polyformaldehyde etc. as proppant take water under high pressure as medium under the necessary condition.In carrying out platform 3, flexible pipe Long-distance Control instrument 301 and water under high pressure Long-distance Control instrument 302 are installed, main frame 1 links to each other with flexible pipe Long-distance Control instrument 301, links to each other with water under high pressure Long-distance Control instrument 302 by a water pipe 10 by four oil pipes 11, at the opposite side of carrying out platform 3, hydraulic power unit 5 links to each other with oil pressure gauge with flexible pipe Long-distance Control instrument 301 by two oil pipes 12, and clean water pump station 4 links to each other with water pressure gauge with water under high pressure Long-distance Control instrument 302 by two water pipes 13.Main frame 1 is positioned at service tunnel 19, and flexible pipe 21 and the Water jet sprayer 22 thereof of main frame 1 are positioned at operation hole 20.Shape, size, nozzle diameter size and arrangement of nozzles form by control Water jet sprayer 22 adapt to different coals (rock) body hardness and creep into demand; Simultaneously, the designs of nozzles of Water jet sprayer 22 will be conducive to creep into deslagging.

In order to realize Long-distance Control, improve safety factor, the present invention also is provided with remote console, it is made of Long-distance Control button 7 and display instrument 8, remote console is electrically connected with switchboard 6 by power cable 17 and control signal cable 18, display instrument 8 is connected with the working condition that 2, three video cameras 2 of three video cameras are respectively applied to monitoring host computer 1, carry out platform 3 and service tunnel 19 by three holding wires 9, to determine doing what operation at remote console.Video camera 2 with the field operation scene information in the service tunnel 19 and carry out execution indication on the platform 3 and display instrument 8 that meter information is transferred to remote setting on, the image information operating remote action button 7 of operating personnel by showing, control signal is sent to switchboard 6, realization is to the start-stop control of clean water pump station 4 and hydraulic power unit 5, realize simultaneously carrying out the dynamic Control of platform 3, and to proportional flow direction combination valve peculiar to vessel and high-pressure water valve travel direction in flexible pipe Long-distance Control instrument 301 and the water under high pressure Long-distance Control instrument 302, the control of pressure versus flow, assurance is put pipe to working rig, the closed tube action, speed and high pressure water switch and pressure flow size are accurately controlled, both can be with regard near operation, accurate Long-distance Control can be realized again, the breakthrough that the high-pressure hydraulic construction operation is carried out in the deathtrap can be implemented in simultaneously.

Such as Fig. 2, Fig. 3 and shown in Figure 4, main frame 1 comprises the hoist cylinder 24 of sledge shape base 38 and 38 side-inverteds of sledge shape base, the piston rod of hoist cylinder 24 is fixed on the sledge shape base 38, hoist cylinder 24 and main frame 1 and the oil pipe 11 of carrying out between the platform 3 are connected, flexible realization lifting by hoist cylinder 24, two hoist cylinders 24 are realized synchronization lifting by synchronous valve or syncmotor are set in hydraulic system, also can realize synchronization lifting by the synchronous crossbeam of rigidity is set on two oil cylinder tops, make main frame 1 carry out operation in the differing heights position, satisfy the different head-room requirements in down-hole.Base 38 bears the weight of whole waterpower working rig, can realize laying complete equipment by laying base 38 under coal mine, simultaneously, is carrying and the movement that makes things convenient for the down-hole, and rubber wheel, universal wheel etc. can be installed in base 38 inside.Hoist cylinder 24 is equipped with cover by the left support abutment 35 on its sidewall and right support abutment 31 and moves footpath tumbler cylinder main shaft 30, cover moves footpath tumbler cylinder main shaft 30 1 ends and is provided with water under high pressure passage 65, the import and export of water under high pressure passage 65 are respectively equipped with water under high pressure tube connector 42 and water under high pressure joint 44, and water under high pressure tube connector 42 and main frame 1 and the water pipe 10 of carrying out between the platform 3 are connected.Move tumbler cylinder main shaft 30 both sides, footpath at cover and be provided with left support arm 37 and right support arm 28, the front end of left support arm 37 and right support arm 28 is equipped with defeated pipe device 25 by junction plate.Cover moves footpath tumbler cylinder main shaft 30 and is provided with cylinder 23, be wound with flexible pipe 21 on the cylinder 23, Water jet sprayer 22 is installed on the flexible pipe 21, flexible pipe 21 1 ends stretch in the defeated pipe device 25, the other end links to each other with water under high pressure joint 44 by high-pressure hose 109, utilizes clean water pump station 4 to provide water under high pressure to flexible pipe 21.The diameter of cylinder 23 is chosen definite according to the diameter of flexible pipe 21, not under the duty, flexible pipe 21 is wrapped on the cylinder 23 at cylinder 23, and when cylinder 23 work, cylinder 23 rotates, and carries flexible pipe 21 by defeated pipe device 25 in boring.Flexible pipe 21 can bear larger compression and tensile strength, and the length of flexible pipe 21 can be crept into length and selected by boring, and the diameter of flexible pipe 21 on the estimation opening diameter is determined.The defeated pipe direction of defeated pipe device 25 and the excircle of cylinder 23 are tangent.On the junction plate of left support arm 37 and right support arm 28 front ends, closed tube hydraulic motor 41 is installed also, hydraulic clutch 40 and reducer 39, closed tube hydraulic motor 41 and main frame 1 and the oil pipe 11 of carrying out between the platform 3 are connected, the output of reducer 39 is provided with drive sprocket 26, cover moves footpath tumbler cylinder main shaft 30 and is provided with the driven sprocket 29 corresponding with drive sprocket 26, drive sprocket 26 and driven sprocket 29 are in transmission connection by chain 27, closed tube hydraulic motor 41 drives drive sprocket 26 and rotates, driving driven sprocket 29 rotates, thereby drive cover and move footpath tumbler cylinder main shaft 30 and cylinder 23 counter-rotatings, to realize the closed tube action to flexible pipe 21.

As shown in Figure 5, cover moves footpath tumbler cylinder main shaft 30 and comprises splined shaft 34 with sliding tray 46, back and forth axle 47, slippage cover 48, spline housing 50 and spindle nose 53, and spline housing 50 is sheathed on the outside of splined shaft 34, and spline housing 50 and cylinder hoop 51 are connected by screw.Cylinder 23 connects as one by spoke and cylinder hoop 51, and spline housing 50 is connected by cylinder hoop 51 and cylinder 23.The endoporus matched in clearance of slippage cover 48 and splined shaft 34, slippage cover 48 is sleeved on the reciprocal axle 47, is provided with left-hand screw groove 66 and the right spiral 67 that end, two ends, the left and right sides communicates at reciprocal axle 47.Offer slider bore 45 at slippage cover 48, be provided with slide block 49 in slider bore 45, slide block 49 tops are provided with slide key 70, and slide key 70 is slidingly matched with left-hand screw groove 66 and right spiral 67.Offer square hole 68 at spline housing 50, be provided with the slide block set 69 that is sheathed on slide block 49 outsides in the square hole 68, slide block set 69 is fixed on the slippage cover 48 by screw, and slide block set 69 is slidingly matched with sliding tray 46.Be provided with stage clip 72 and steel ball 73 in slide block 49, jackscrew 71 is pressed on the stage clip 72 by steel ball 73 tops, and under stage clip 72 effects, slide key 70 remains with left-hand screw groove 66 or right spiral 67 and is slidingly matched.Spindle nose 53 is fixed on splined shaft 34 right sides, the right-hand member of spindle nose 53 and reciprocal axle 47 is positioned at right support abutment 31, be installed with the first gear 59 at spindle nose 53 end faces, back and forth axle 47 outer ends are provided with the second gear 60, the second gear 60 is connected with reciprocal axle 47 by key 61, the first gear 59 and the second gear 60 1 sides are provided with duplicate gear 63, and duplicate gear 63 is meshed with the first gear 59 and the second gear 60 respectively.

Reciprocal axle 47 is set in that splined shaft 34 is interior, can make cylinder 23 in rotating in same direction, realize axially reciprocating, remain consistent with the defeated tube hub line of defeated pipe device 25 on left and right directions when flexible pipe 21 moves along the excircle tangential direction of cylinder 23, thereby different-diameter flexible pipe 21 is realized that multilayer order twines, realize the orderly folding and unfolding action of flexible pipe 21.

Move between the footpath tumbler cylinder main shaft 30 at right support arm 28 and cover and to be provided with adjusted device, the tuning center of right support arm 28 moves directly with cover that the center of rotation of tumbler cylinder main shaft 30 overlaps.Adjusted device comprises the copper sheathing 54 of spindle nose 53 outsides and the ring gear 52 of copper sheathing 54 outsides, the outer circumference surface of ring gear 52 and right support arm 28 are connected, be provided with the pinion shaft 56 with ring gear 52 engagements in the right support abutment 31, the end of pinion shaft 56 is provided with turbine 57, turbine 57 is meshed with the worm screw 58 that stretches to right support abutment 31 outsides, the outside of worm screw 58 connects tuning hydraulic motor 36, and tuning hydraulic motor 36 is connected with oil pipe 11 between main frame 1 and the execution platform 3.By adjusted device right support arm 28 is rotated, thereby make defeated pipe device 25 adjust direction around cylinder 23 axis, remain that the defeated pipe direction of defeated pipe device 25 is consistent with the tangential direction of cylinder 23, to realize that main frame 1 carries out operation at Difference angles.

As shown in Figure 6 and Figure 7, described defeated pipe device 25 comprise on transmission case body 74, upper cover plate 75, lower cover 111 and the lower cover 111 arrange put pipe hydraulic motor 32 and hydraulic clutch 33, put pipe hydraulic motor 32 and be connected with oil pipe 11 between main frame 1 and the execution platform 3.At the interior chain 78 that is provided with side by side on two pairs of sprocket wheels and the every pair of sprocket wheel of transmission case body 74, the sprocket wheel 77 that a sprocket wheel 76 wherein in the pair of sprocket is provided with in drive sprocket axle 87, the right side pair of sprocket is provided with driven chain wheel shaft 88, be provided with driving gear 85 at drive sprocket axle 87, driven chain wheel shaft 88 is provided with driving gear 85 numbers of teeth and equates and intermeshing driven gear 86, and drive sprocket axle 87 lower ends drive with hydraulic clutch 33 and are connected.Be provided with little bent plate 110 in the outside of chain 78, little bent plate 110 is fixed with fixture block 80 by screw 79, fixture block 80 outsides are provided with groove, form the defeated tube chamber that contains flexible pipe 21 between the relative fixture block 80 of lateral surface, and defeated tube chamber and flexible pipe 21 profiles adapt.For stretching chain 78, prevent that it from lax causing flexible pipe 21 to skid, be provided with track 82 in transmission case body 74 bottoms by fixed block 83, fixed block 83 is provided with the adjustment screw 84 that withstands on track 82 sides, and the top, another side of track 82 is pressed in the inboard of chain 78.

Flexible pipe 21 is clamped between two fixture blocks 80, and the frictional force between flexible pipe 21 dependence and the fixture block 80 travels forward and puts pipe.By the hydraulic synchronization loop is set, to putting pipe hydraulic motor 32 fuel feeding, hydraulic clutch 33 closes, fixture block 80 clamping flexible pipes 21 are outwards carried, meanwhile, closed tube hydraulic motor 41 is fuel feeding not, and hydraulic clutch 40 separates, cylinder 23 is passive rotation under the pulling of flexible pipe 21, finishes to put the pipe action; Otherwise, to closed tube hydraulic motor 41 fuel feeding, hydraulic clutch 40 closes, drive initiatively backward rotation of bottom roll 23 at chain 27, on cylinder 23, twine flexible pipe 21, meanwhile, put not fuel feeding of pipe hydraulic motor 32, hydraulic clutch 33 separates, and flexible pipe 21 drives fixture block 80 and chain 78 counter motions, finishes the closed tube action.

For adapting to boring differing heights, different angle and azimuthal requirement, but cylinder 23 oscilaltions are moved, and moving range is highly definite by height and the perforate of hoist cylinder 24, simultaneously, also can before creeping into, adjust the inclination angle of defeated pipe device 25, satisfy different angles perforate demand.The operating principle of cylinder 23 is: closed tube hydraulic motor 41 rotates, and drives drive sprocket 26 and rotates, and drives driven sprocket 29 by chain 27 and rotates, and splined shaft 34 and driven sprocket 29 interlocks rotate thereby drive cylinder 23; Splined shaft 34 links to each other with spindle nose 53, splined shaft 34 drives spindle nose 53 and rotates, spindle nose 53 drives the first gear 59 and rotates, the first gear 59 and duplicate gear 63 engagements, duplicate gear 63 meshes with the second gear 60 simultaneously, rotates thereby drive reciprocal axle 47, and makes splined shaft 34 and reciprocal axle 47 produce outer corner difference, by changing gear-driven gear parameter, can realize the outer corner difference that needs; Splined shaft 34 and the outer corner difference that back and forth exists between the axle 47 so that slide key 70 at left-hand screw groove 66 or right spiral 67 interior relative slidings, thereby make slide block 49 and slide block set 69 in sliding tray 46 interior movements, and drive spline housing 50 and cylinder 23 moves.Since back and forth the left-hand screw groove on the axle 47 66 and right spiral 67 be left-right rotary to helicla flute, and communicate at two ends, the left and right sides, when slide block 49 in the 66 interior motions of left-hand screw groove to the end the time, slide key 70 changes right spiral 67 automatically over to, realization automatic reverse, vice versa.The different pitch of helicla flute reaches by the suitable outer corner difference of transmission mechanism selection on the reciprocal axle 47 by selecting, and cylinder 23 is revolved when turning around, and moves axially the distance of flexible pipe 21 diameter, realizes flexible pipe 21 windings of single layer or multi-lay winding.

As shown in Figure 8, flexible pipe Long-distance Control instrument 301 comprises the indication panel 89 of fixing by junction plate 97 on proportional flow direction combination valve 96 peculiar to vessel and the proportional flow direction combination valve 96 peculiar to vessel, be connected with action bars 90 by reversing swinging moving axis 95 on the proportional flow direction combination valve 96 peculiar to vessel, offer chute 91 on the action bars 90.Motor and reductor 92 are installed on the junction plate 97, the output shaft of motor and reductor 92 is positioned at the centre position of indication panel 89, the output shaft of motor and reductor 92 is provided with crank 93, and the other end of crank 93 is equipped with slide-bar 94, and slide-bar 94 is slidingly matched with chute 91.Selecting hydraulic oil by operating operation bar 90 is to supply with closed tube hydraulic motor 41, or supplies with and put pipe hydraulic motor 32, thereby realizes closed tube and put switching between the pipe, controls simultaneously the hydraulic fluid flow rate size.Indication panel 89 is respectively equipped with 40 ° graduation mark from the centre to both sides, if action bars 90 is to the right for putting pipe, then action bars 90 is left closed tube, big or small by the angular dimension control hydraulic fluid flow rate that manipulation bar 90 swings to the left or to the right, thereby the rotating speed of control hydraulic motor realizes controlling the speed of putting pipe or closed tube.

As shown in Figure 9, water under high pressure Long-distance Control instrument 302 comprises the indicating dial 98 that arranges by adapter sleeve 107 on high-pressure water valve 108 and the high-pressure water valve 108, the motor and the reductor 100 that are positioned at indicating dial 98 rear portions are installed above the adapter sleeve 107, and the output of motor and reductor 100 is positioned at the center of indicating dial 98.Output at motor and reductor 100 is provided with pointer 99 and crank 102, and the other end of crank 102 is hinged with connecting rod 104 by bearing pin 103, and the other end of connecting rod 104 is hinged mutually by the slide valve lever 106 of rotating shaft 105 with high-pressure water valve 108.During work, the water under high pressure of clean water pump station 4 outputs enters the P mouth of high-pressure water valve 108 by water pipe 13, and by in the flexible pipe 21 arrival operation holes 20, by operating electrical machines and reductor 100 runnings, make crank and connecting rod movement, can control the position of slide valve lever 106, see the assigned address of looking into pointer 99, thereby adjust water under high pressure flow and the flow direction, realize the switch of control water under high pressure and the size of water under high pressure flow.

The present invention is the technique of finishing by mining water power working rig, and this technique in turn includes the following steps:

A, creep into

1) measure boring head-room of living in, determine boring perforate height, hole length, inclination angle and azimuth, place's coal (rock) body structure is crept in observation, tests its mechanical strength, and at least one group of coal (rock) mechanics intensity is tested in each work plane or exploiting field;

8) move back brill and finish, can carry out creeping into of next boring;

B, the coal seam is anti-reflection

C, boring are repaired

For existingly cave in, wet hole, can utilize the characteristics that mining water power working rig pressure is large, discharge capacity is large, continuity is strong, use water under high pressure that boring is cleaned, make outside the cinder tap that caves in the hole, in addition, mining water power working rig can also be under the effect of high-pressure high-flow water, slot, reaming are carried out in boring, reach to the full extent the anti-reflection purpose of open-work, the water that cleans after holing can remain in the hole, affected the extraction of gas, at this moment, residual water blew outside the tap in the employing mine pressure air will be holed.

Concrete steps are as follows:

Water jet sprayer begins to retreat when 5) creeping at the bottom of the hole, dredge poroid attitude and switch to the slot state, open hydraulic power unit, make the cylinder backward rotation of mining water power working rig, slowly regain flexible pipe, meanwhile, water under high pressure enters boring enforcement punching operation with the path of step 3) in the boring repair process, turns to operation or work standard to rush the coal output maximum;

D, gas drive is anti-reflection

CH ₄(gas) and CO ₂And the difference of active force between the coal molecule causes coal to CH ₄And CO ₂Adsorption capacity is different.CH under this active force and the uniform pressure ₄And CO ₂Boiling point relevant, boiling point is higher, the ability that is adsorbed is stronger, CH ₄And CO ₂Boiling point be respectively 161 ℃ and 78 ℃, thereby CO ₂Has stronger adsorption capacity on the coal surface.Simultaneously, coal body is to CH ₄And CO ₂Adsorption test verified: coal is to CO ₂Adsorption capacity greater than coal CH ₄Adsorption capacity.These researchs have all fully been proved at coal surface C O ₂Has the very strong CH that drives ₄Ability is CO ₂Displacement displacement CH ₄Enforcement theoretical foundation is provided.

1) select the boring of gas pumping weak effect as implementing the hole, and get rid of the poor boring of extracting result that collapse hole or ponding cause, open drainage tube, the flexible pipe of mining water power working rig is transferred at the bottom of the drilling hole by defeated pipe device, and drilling orifice sealed with the aerated rubber loop that length is not less than 1m, medium in the clean water pump station is changed to gas, gas injection in the flexible pipe;

Except using CO ₂Carry out gas drive anti-reflection outside, can also use air to carry out gas drive, but owing to need shutoff hell in the gas drive process, and in gas injection process because the boring drag effect, the air of injection or CO ₂Being difficult to has affected calmly the gas drive effect with at the bottom of the elevated pressures arrival hole.Use jetting equipment can be by coiled tubing with any position of gas inject in the hole, and for long drilled holes, also can directly carry out gas drive at the bottom of its hole and do not need to carry out sealing of hole.

In the present invention, high-pressure water jet is as working media take water, has high level density, aspect coal bed drilling, high-pressure water jet boring has the advantage of following several respects: when high-pressure water jet creeps into, by water jet cutting coal petrography, nozzle does not directly contact with coal body, the defectives such as the heating, wearing and tearing, life-span of mechanical drill be short can not appear, and drilling diameter is large, rate of penetration is fast, energy consumption is low, the phenomenons such as the bit freezing that occurs in the time of can effectively avoiding machine drilling, stick of tool can improve the boring gas permeability in coal seam on every side simultaneously; When high-pressure water jet crept into, the bottom, hole was in floodage, and temperature is low, did not have spark to produce, and can be used for having the boring in the spontaneous combustion coal seam; Under the effect of continuous flexible steel pipe, can realize creeping into continuously of coal and rock beds boring, do not need the changing-over drilling rod, make drilling construction simple and easy to do.

The coal seam is anti-reflection to be that hydraulic jetting fracturing is carried out in the coal seam, reaches fixed point, orientation, the even purpose of pressure break, mainly can realize hydrodynamic cleaning release, hydraulic jetting fracturing and the waterpower techniques such as pressure break of handling up.

Swallowing-spitting hydrodynamic cleaning stress-relief process is that coal body destruction is peeled off discharge, and stress state changes, a large amount of processes that discharge of gas.At first utilize the high-pressure water jet broken coal, go out a large amount of coal bodies by this hole within a certain period of time, form larger-diameter hole, thereby destroy the former balancing of stresses state of coal body, significant displacement occurs to the hole direction in coal body around the hole, impel the stress state redistribution, the concentrated stress band moves outward, and effective stress reduces; The dynamic equilibrium of gas adsorption and desorb has been broken in the reduction of the generation in new crack and stress in next coal seam, make the part adsorption gas change into free gas, free gas is then discharged by the crack migration, discharged significantly Elastic latent energy and gas expansion energy in coal body and the country rock, the coal-bed gas gas permeability significantly improves; At last, water under high pressure has wet coal body, reduces the desorption rate of residual gas in the coal body.The hydrodynamic cleaning process has been gone out the coal of a large amount of gas and some, therefore forms certain release, firedamp drainage zone in coal body, in this safety zone, has destroyed the basic condition of outstanding generation, has played the outstanding effect of effectively preventing.

Finish boring to constructing, select suitable jetting spray nozzle, start the jetting equipment, do not add water under high pressure, in the time of at the bottom of coiled tubing extend into the hole, add water under high pressure by high-pressure hydraulic pump to hydraulic ejector, water under high pressure is through coiled tubing, at last again nozzle ejection, boring make outside the coal that is attached to hole wall, the rock dust evacuation aperture under the water under high pressure effect of nozzle ejection.Simultaneously, because the jet erosion of water under high pressure enlarges boring aperture, the local cavity that forms has strengthened the boring discharge space, has increased Permeability Coefficent in Coal Seam, has improved extraction efficient.

To construction drill not, can use the water jet equipment to creep into, creep into to finish and implement the flushing release, finish boring with having constructed.

Hydraulic jetting fracturing is applied to the down-hole hard coal and mainly contains injection and two effects of pressure break.By the fluid after the fracturing pump supercharging, behind the nozzle of grade diameter, be converted into high-speed jet, and enter the coal seam rapidly.Because the Incoercibility of drilling orifice finite volume and water, the boring inner fluid can push jet, cause its axis speed to be decayed rapidly, huge kinetic transformation is interior energy, and in the hole, decay, the huge kinetic energy of water under high pressure is converted into pressure energy again, so that stagnation pressure raises rapidly in the hole, forms pressurized effect.When supercharging value in the hole surpasses the stratum initial cracking pressure, the immediately crack initiation of boring end coal seam.Owing to can form low-pressure area around the nozzle, be entered the crack so annular fluid can entrainment.Ordering about the crack extends forward.

Hydraulic jetting fracturing is applied to the down-hole cherry coal and mainly contains injection and two effects of punching.

First for spraying the effect to cherry coal.In the boring of having constructed, coal seam sector hole wall hits, broken coal to holing to utilize jetting, and go out within a certain period of time a large amount of coal bodies, form larger-diameter hole, thereby destroy the former balancing of stresses state of coal body, significant displacement occurs to the hole direction in coal body around the hole, impels the stress state redistribution, the reach of concentrated stress band, effective stress reduces; Secondly the stress in the coal seam reduces the dynamic equilibrium of having broken gas adsorption and desorb, make the part adsorption gas change into free gas, free gas is then discharged by the crack migration, discharged significantly Elastic latent energy and gas expansion energy in coal body and the country rock, the coal-bed gas gas permeability significantly improves; At last, water under high pressure has wet coal body, can reduce the desorption rate of residual gas in the coal body, plays the Gas effect that suppresses.

Second is that hydraulic flushing in hole is to the effect of cherry coal.In the jetting process, cherry coal partly impacts boring and playpipe annular space place, because jet velocity is greater than cherry coal squit hole speed, the cherry coal at annular space place is constantly filled, compacting, played the effect of sealing of hole, this hole only has micro-water outlet, has played the effect in sealing of hole pressure break coal seam.

Can use mining water power working rig to realize hydraulic jetting fracturing by two kinds of operating types:

Mode one: after drilling construction is finished, jetting shower nozzle and nozzle are at this moment near at the bottom of the hole, can outside the hole, direction spur jetting shower nozzle and nozzle, (such as 10m) carries out the injection (can regulate by high-pressure hydraulic pump and inject flow and pressure) of low-intensity short period at a certain distance, not make coiled tubing be difficult to extract into good, by jetting, produce comparatively uniformly jet crack in the hole.Make near the aperture, strengthen the flow and the pressure that spray, make coal in the hole, rock dust not be deposited in soon the aperture owing to flowing velocity has jet to return water speed, block the space between coiled tubing and the borehole wall, at this moment, carry out fracturing and can open comparatively uniformly, extend, link up the crack, within a big way, increase the permeability coefficient in coal seam, improve extraction efficient.

Mode two: after drilling construction was finished, coiled tubing is every to be moved a certain distance to the aperture, just carried out the hydraulic jetting fracturing of a high-pressure large-displacement, until the aperture.

Mode one and two all can realize even, the fixed point crack initiation of coal bed drilling, but because mode two is in actual mechanical process, whenever move back to the aperture and once carry out pressure break, then pressure break has been carried out again in the crack of its front end one time, although can cause larger crack like this, but owing to lost certain discharge, it is larger to make seam effect and ideal effect deviation when carrying out the hydraulic jetting fracturing of this section.

In hard coal, the waterpower pressure break of handling up makes boring effectively be communicated with hugger, crack, and through constantly injecting fracturing fluid, get rid of the water cinder, around boring, form the cave, make the suffered stress of coal seam reservoirs obtain release, stress field redistribution, change has occured in the stress that acts on the cave, it is partly transferred to beyond the wall in cave, has formed the unidirectional load that points to the cave in the coal seam, causes that coal body for want of supports and mobile in the cave.This impact is constantly continuity in the coal seam, can expand to around the cave in the certain limit, effectively opens, extends, linked up the crack, the volume transformation within forming in a big way.The pressure break of handling up is anti-reflection to form 4 class cracks when forming the boring cave: radially draw the separation fracture, periphery draws separation fracture, shear crack and turns to the crack.

In cherry coal, the mechanical property of cherry coal self determines that it can not pressure break, by the pressure break of handling up, can form the cave in soft seam, plays the effect of release.The cave forms after the certain space, can not continue expansion, and at this moment, fracturing fluid pressure increases gradually in the cave in, and the peripheral coal body in compacting cave forms hard, low-porosity, heavily stressed compaction band, makes the gas can not the quickly migrate output.After forming compaction band, the fracturing fluid of injection is difficult in coal seam relaying afterflow moving, occurs squeezing expanding and the puncture phenomenon.

By using the jetting equipment, become discharge capacity pressure break is implemented to handle up in the optional position in the boring length, the pressure break borehole space scope of handling up is increased, even unlatching and the release in crack more are conducive to hole, simultaneously, the hole-sealing technology of complexity has been saved hole sealing tube when having avoided handling up pressure break in the past, save the time, created benefit.

Creep in boring, in anti-reflection, the repair process, required injection pressure and the control of flow mainly are the impacts that is subjected to following factor: strata pressure size, Coal Pore Structure and coal body compressive strength during the work of mining water power working rig.

The strata pressure size

Use mining waterpower equalization machine creep into, when anti-reflection owing to be to carry out operation in the down-hole, therefore, its required pressure is subject to the overlying formation pressure impact, nozzle outlet pressure can be determined by following formula:

Wherein: ---for creep into, anti-reflection fracture pressure, MPa;

，

Wherein:

---upper overlying strata stone proportion;

---rock thickness;

---the tensile strength of rock, MPa gets 2MPa;

---pipeline and coiled tubing frictional resistance, MPa is generally 20% of overpressure.

Coal Pore Structure

Coal Pore Structure directly affects gas pressure and flow required when holing reparation, according to China's coal geology feature, Coal Pore Structure is divided into 4 types, wherein, II, III, IV class coal, because its Coal Pore Structure is soft, the f value is less.

When holing repair for I class coal, gather the operating area coal sample, test its mechanical strength or f value, according to the size of test value, select suitable injection pressure.Inject flow by the ability decision of water injecting pump, in the situation that keeps pressure, in conjunction with broken coal amount and discharge speed, determine suitable injection rate (injection rate); For II, III, when IV class coal is holed repair, when repair is carried out in the boring of this class coal body, required injection pressure is difficult for too large, can play the effect of washing away cherry coal gets final product, because the cherry coal particle is less, do not exist individual particle to stop up the possibility of boring, required injection flow is larger, can make the cherry coal that washes away return timely outside the tap, otherwise it is untimely that cherry coal returns row, piles up and stop up easily boring, the coiled tubing of waterpower equalization machine is stuck in the hole, is difficult to play the purpose that boring is repaired.

Table 1 Coal Pore Structure 4 class partitionings

3. coal body compressive strength

The mechanical property of rock refers to the deformation properties of rock, such as elasticity, plasticity, fragility, wilfulness and creep properties, and the intensity property of rock, namely rock to press, draw, curved, the resistivity of the external force such as cutting.In production practices, generally use a comprehensive index " solid coefficient f " to represent the complexity of the rock failure mechanism of rock, claim that usually f is the Pu Shi rock consolidating coefficient.

In the formula: R---the uniaxial compressive strength of rock, MPa.

According to the size of f index, rock is divided into 10 grades 15 kinds.

Table 2 Classification of Rock table

In the time can't using Observations Means to carry out the Coal Pore Structure judgement, but samples of coal pulled, directly test its f value according to test condition, or by test R value calculating f value, afterwards, judge Coal Pore Structure according to the size of f value, according to judging type, determine injected water volume and pressure according to Coal Pore Structure, the repair of holing.

Creep into for boring, need test or calculate its R value, required injection pressure that overlying formation pressure and compressive strength sum can be used as waterpower equalization machine drill when advancing.

Determining of injection pressure, flow

Injection pump:Mining waterpower equalization machine is according to the industrial and mineral needs, have the models such as different injection pressures, flow, the maximum pressure of injection pump and the size of flow have directly determined the service condition of waterpower equalization machine, therefore, when selecting working rig, to according to on-site actual situations, choose the mining waterpower equalization machine of suitable types.

Flexible pipe:At present, the main transfer pipeline that waterpower equalization machine uses is coiled tubing, premenstruum (premenstrua) laboratory test, internal diameter is the coiled tubing of 12mm, be 200L/min at injected water volume, line loss pressure is 5Mpa/100m, and internal diameter is the coiled tubing of 16mm, be 200 L/min at injected water volume, line loss pressure is 4Mpa/100m.

Nozzle:According to boring creep into, anti-reflection, repair required injection pressure, finally use nozzle to realize, according to size, the number of nozzle bore, determine injection pressure.

Computational methods:Use Bernoulli equation between 2 inside and outside the jet expansion face, ignoring the difference in height between 2, can be able to lower relational expression:

In the formula:

,

---the inside and outside static pressure of nozzle;

,

---outer fluid mean flow rate in the nozzle.

Equation of continuity between 2 can get:

Nozzle flow channel is tube-shaped structure, namely

,

, can get:

Because

,

, can get jet and simplify expression formula:

According to following formula, according to the required pressure of water jet, can carry out the calculating of flow.

Claims

1. the creeping into an of coal mine down-hole drilling, anti-reflection, reparation and gas drive displacement integrated approach is characterized in that, finish successively following steps by mining water power working rig:

A, creep into

8) move back brill and finish, can carry out creeping into of next boring;

B, the coal seam is anti-reflection

C, boring are repaired

D, gas drive is anti-reflection

2. coal mine down-hole drilling as claimed in claim 1 creeps into, anti-reflection, repair and gas drive displacement integrated approach, it is characterized in that, described mining water power working rig comprises main frame, carry out platform, clean water pump station, hydraulic power unit and switchboard, carry out in the platform flexible pipe controller and water under high pressure controller are installed, main frame links to each other with the flexible pipe controller by oil pipe, link to each other with the water under high pressure controller by water pipe, the flexible pipe controller links to each other with hydraulic power unit by oil pipe, the water under high pressure controller links to each other with clean water pump station by water pipe, carries out platform, clean water pump station and hydraulic power unit are electrically connected with switchboard by power cable respectively; Described main frame comprises the hoist cylinder of sledge shape base and the side-inverted of sledge shape base, and hoist cylinder is equipped with cover by the left support abutment on its sidewall and right support abutment and moves footpath tumbler cylinder main shaft, and hoist cylinder is connected with oil pipe between main frame and the execution platform; Cover moves footpath tumbler cylinder main shaft one end and is provided with the water under high pressure passage, and the import and export of water under high pressure passage are respectively equipped with water under high pressure tube connector and water under high pressure joint, and the water under high pressure tube connector is connected with water pipe between main frame and the execution platform; Cover moves tumbler cylinder main shaft both sides, footpath and is provided with left support arm and right support arm, and left support arm and right support arm front end are provided with defeated pipe device; Left support arm and right support arm front end also are equipped with closed tube hydraulic motor, hydraulic clutch and reducer, closed tube hydraulic motor and main frame and the oil pipe of carrying out between the platform are connected, the reducer output is provided with drive sprocket, cover moves footpath tumbler cylinder main shaft and is provided with the driven sprocket corresponding with drive sprocket, and drive sprocket and driven sprocket are provided with chain; Cover moves footpath tumbler cylinder main shaft and is provided with cylinder, is wound with flexible pipe on the cylinder, and Water jet sprayer is installed on the flexible pipe, and flexible pipe one end stretches in the defeated pipe device, the other end links to each other with the water under high pressure joint by high-pressure hose; Defeated pipe device defeated pipe direction and cylinder excircle are tangent.

3. the creeping into of coal mine down-hole drilling as claimed in claim 2, anti-reflection, reparation and gas drive displacement integrated approach, it is characterized in that, described cover moves footpath tumbler cylinder main shaft and comprises the splined shaft with sliding tray, reciprocal axle, slippage cover, spline housing and spindle nose, spline housing is sheathed on the splined shaft outside, spline housing is connected by cylinder hoop and cylinder, and spindle nose is fixed on the splined shaft right side; Slippage cover and splined shaft endoporus matched in clearance, the slippage cover is set on the reciprocal axle, back and forth axle is provided with left-hand screw groove and the right spiral that the end communicates, and slippage puts and offers slider bore, is provided with slide block in the slider bore, slider top is provided with slide key, slide key and left-hand screw groove and right spiral are slidingly matched, and offer square hole on the spline housing, are provided with the slide block set that is sheathed on the slide block outside in the square hole, slide block set is fixed in slippage by screw and puts, and the sliding tray of slide block set and splined shaft is slidingly matched; Back and forth the right-hand member of axle passes spindle nose, spindle nose is positioned at right support abutment, is installed with the first gear on the spindle nose end face, and back and forth the axle outer end is provided with the second gear, the first gear and the second gear one side are provided with duplicate gear, and duplicate gear is meshed with the first gear and the second gear respectively.

4. the creeping into of coal mine down-hole drilling as claimed in claim 3, anti-reflection, reparation and gas drive displacement integrated approach is characterized in that be provided with stage clip and steel ball in the described slide block, jackscrew is pressed on the stage clip by the steel ball top.

5. the creeping into of coal mine down-hole drilling as claimed in claim 2, anti-reflection, reparation and gas drive displacement integrated approach, it is characterized in that, described defeated pipe device comprise arrange on transmission case body, upper cover plate, lower cover and the lower cover put pipe hydraulic motor and hydraulic clutch, put the pipe hydraulic motor and be connected with oil pipe between main frame and the execution platform; Be provided with side by side the chain on two pairs of sprocket wheels and the every pair of sprocket wheel in the transmission case body, wherein a sprocket wheel in the pair of sprocket is provided with drive sprocket axle, another is provided with the driven chain wheel shaft to a sprocket wheel in the sprocket wheel, drive sprocket axle is provided with driving gear, the driven chain wheel shaft is provided with the driven gear that is meshed with driving gear, and the drive sprocket axle outer end drives with hydraulic clutch and is connected; The chain outside is fixed with fixture block by little bent plate, and the fixture block outside is provided with groove, forms the defeated tube chamber that contains flexible pipe between the relative fixture block of lateral surface.

6. the creeping into of coal mine down-hole drilling as claimed in claim 5, anti-reflection, reparation and gas drive displacement integrated approach, it is characterized in that, described transmission case body bottom is provided with track by fixed block, and fixed block is provided with the adjustment screw that withstands on the track side surfaces, and top, track another side is pressed in the chain inboard.

7. the creeping into of coal mine down-hole drilling as claimed in claim 2, anti-reflection, reparation and gas drive displacement integrated approach, it is characterized in that, described support arm and cover move between the tumbler cylinder main shaft of footpath and are provided with adjusted device, and the tuning center of support arm overlaps with the center of rotation that cover moves footpath tumbler cylinder main shaft; Adjusted device comprises the copper sheathing of spindle nose outside and the ring gear of copper sheathing outside, the outer circumference surface of ring gear and right support arm are connected, be provided with the pinion shaft with the ring gear engagement in the right support abutment, the end of pinion shaft is provided with turbine, turbine is meshed with the worm screw that stretches to the right support abutment outside, the outside tuning hydraulic motor that connects of worm screw, the tuning hydraulic motor is connected with oil pipe between main frame and the execution platform.

8. coal mine down-hole drilling as claimed in claim 2 creeps into, anti-reflection, repair and gas drive displacement integrated approach, it is characterized in that, described flexible pipe controller is flexible pipe Long-distance Control instrument, it comprises on proportional flow direction combination valve peculiar to vessel and the proportional flow direction combination valve peculiar to vessel by the fixing indication panel of junction plate, be connected with action bars by the reversing swinging moving axis on the proportional flow direction combination valve peculiar to vessel, offer chute on the action bars, motor and reductor are installed on the junction plate, the output shaft of motor and reductor is positioned at the indication panel centre position, the output shaft of motor and reductor is provided with crank, the crank other end is equipped with slide-bar, and slide-bar and chute are slidingly matched.

9. the creeping into of coal mine down-hole drilling as claimed in claim 2, anti-reflection, reparation and gas drive displacement integrated approach, it is characterized in that, described water under high pressure controller is water under high pressure Long-distance Control instrument, it comprises the indicating dial that arranges by adapter sleeve on high-pressure water valve and the high-pressure water valve, the motor and the reductor that are positioned at the indicating dial rear portion are installed above the adapter sleeve, and the output of motor and reductor is positioned at the indicating dial center; The output of motor and reductor is provided with pointer and crank, and the crank other end is hinged with connecting rod by bearing pin, and the connecting rod other end is hinged mutually by the slide valve lever of rotating shaft with high-pressure water valve.

10. such as the creeping into of arbitrary described coal mine down-hole drilling among the claim 2-9, anti-reflection, reparation and gas drive displacement integrated approach, it is characterized in that, described mining water power working rig also comprises the remote console that is made of Long-distance Control button and display instrument, remote console is electrically connected with switchboard by power cable and control signal cable, and display instrument is connected with monitoring host computer by holding wire and carries out the video camera of platform.