CN105134112A - Hole-flushing method for gas extraction drilled hole under coal mine - Google Patents
Hole-flushing method for gas extraction drilled hole under coal mine Download PDFInfo
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- CN105134112A CN105134112A CN201510579809.9A CN201510579809A CN105134112A CN 105134112 A CN105134112 A CN 105134112A CN 201510579809 A CN201510579809 A CN 201510579809A CN 105134112 A CN105134112 A CN 105134112A
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Abstract
The invention discloses a hole-flushing method for a gas extraction drilled hole under a coal mine. A hole-flushing device composed of a water tank, a high-pressure pump, a high-pressure hard pipe, a high-pressure hose, a self-propelled drill bit, a base, a winch and a pushing mechanism is adopted for crashing and flushing blocked and collapsed parts of the gas extraction drilled hole which blockage and collapse occur on under the coal mine through the rock-breaking capacity of self-propelled water jet, and the drilled hole is dredged and reamed; traction force provided by the self-propelled drill bit is utilized for moving the high-pressure hose forwards in a straightening mode; the characteristics that the resin pipe has certain rigidity and can transmit pushing force are utilized for moving the self-propelled drill bit forwards within a larger range. The hole-flushing method mainly has the effects of dredging and reaming the blocked and collapsed drilled hole under the coal mine so as to improve gas extraction efficiency. Compared with the prior art, the hole-flushing method has the advantages of being convenient to operate, capable of improving hole-flushing efficiency and the like and is mainly suitable for dredging the blocked extraction drilled hole in the process of gas extraction on a soft coal bed.
Description
Technical field
The invention belongs to coal production field, relate to a kind of hole flushing method of coal mine gas extraction borehole, use when being adapted at the extraction borehole of dredge blockage in lower permeability seam gas pumping process.
Background technology
China's highly gassy mine quantity is large, and distribution is wide, and most of highly gassy mine is coal and gas outburst mine.Meanwhile, pit mining degree of depth cumulative year after year, coal seam gas-bearing capacity increases further, and projecting coal bed quantity is increase trend.Boring Gas pre-drainage administers one of the most general method of coal mine gas disaster, but projecting coal bed generally soft, and especially southwest, the colliery minable coal seam of 93.14% is all the weak seam with coal and gas prominent danger.Because coal rock strength is low, after mash gas pumping drilling pore-forming, receive the impact of geostatic stress, gas stress and mining stress field, weak seam borehole wall, easily across collapsing, is holed yielding.When boring collapse, block time, gas circulation interrupted, very easily cause scrapping of boring, shorten boring application life, affect extracting result, threat Safety of Coal Mine Production.
Easily there is the problems such as collapse hole for weak seam, scholar is had to propose the solutions such as solid hole, anti-collapse hole of holing, disclosed in Chinese patent literature CN102226389A " coal mine drilling anti-collapse hole pipe network and anti-collapse hole method " and CN103114810A disclosed " the anti-collapse hole of a kind of coal bed drilling creeps into lower sleeve device and boring method with brill ", but there is following problem in implementation process in the method proposed: drill bit and drilling tool often complex structure, heaviness after improving, manufacturing cost is higher, be not suitable with the on-the-spot narrow space of coal mine underground construction, cause drilling efficiency low; And still can not solve the collapsing of boring, blockage problem completely.And in colliery a large amount of exist collapse, block boring, the main method de-plugging adopting mechanical drilling tool again to creep into drainage holes now." the clear hole drill tool " of CNI02312660A bulletin devises the clear hole drill tool of the simple machinery of a kind of structure, but use mechanical drilling tool complement not only cost of holing high, and exist rig low to hole difficulty, drilling efficiency, move back after brill needs waste plenty of time, boring and need again the problems such as sealing of hole.The successful Application of Bound moisture jet in weak seam is anti-reflection, someone proposes to utilize water jet hole flushing, disclosed in CN103015898A, " a kind of mining water power working rig " devises a kind of gas pumping hole waterpower working rig, this design has used high-pressure water jet to carry out hole flushing to mash gas pumping drilling, the method more in the past mechanical drill has more high efficiency, but still there is following problem: the waterpower working rig build of design is huge, be difficult to adapt to the narrow and small working space in down-hole; The winding steel pipe hardness used is large, fatiguability damages, and bit freezing easily occurs in drilling process in pressure progradation, bores partially.
Summary of the invention
The present invention be directed to weak seam mash gas pumping drilling easily to collapse, block, affect gas pumping efficiency, threaten the problems such as Safety of Coal Mine Production, according to the actual job environment in colliery and the coal and rock character of boring, propose to utilize self-propelled high pressure water jet and the active propulsion to power pipeline, coal mine gas is collapsed, block the method that boring carries out dredging de-plugging.Improve gas pumping efficiency.
The invention provides following technical scheme:
The hole flushing method of the coal mine gas extraction borehole that the present invention proposes, adopt the boring hole flushing device be made up of water tank, high-pressure pump, high pressure hard tube, high-pressure hose, self-feeding bit, base, capstan winch and propulsive mechanism, step is as follows:
(1) according to position and the angle of the hole that collapses, blocking boring, fix the bottom support frame of base, and adjust the length of propulsive mechanism support on the angle of supporting leg and guide rail on base and guide rail;
(2) then capstan winch and propulsive mechanism are fixed on base, and connect the power pipeline of high pressure hard tube and high-pressure hose composition, and connect self-feeding bit;
(3) water under high pressure produced by high-pressure pump flows to through piping and high pressure sealing water tail the high pressure hard tube be wrapped on capstan winch, high pressure hard tube can through propulsive mechanism before feeding boring, and the propulsive force provided by propulsive mechanism makes high pressure hard tube be fed forward along boring;
(4) when the high-pressure hose of water under high pressure through high pressure hard tube front end and self-feeding bit, self-feeding bit produces high-pressure water jet and is divided into front jet, middle jet and rear jet three part.The rock of front jet to blocking, the part that collapses carries out fragmentation dredging, and has the effect of certain reaming; Middle jet has centralizing function to drill bit, can effectively prevent bit drills inclined; What rear jet was drill bit creep into provides and makes high-pressure hose exceptionally straight from entering power, the pulling force of whole power pipeline high-pressure hose above and below propulsive mechanism to the conveying that can realize long term distance under the acting in conjunction of the thrust that high pressure hard tube is provided by frictional force, thus realize the dredging to medium-length hole.
(5) after hole flushing, high pressure hard tube and high-pressure hose are regained by propulsive mechanism and capstan winch;
(6) after hole flushing, gas pumping effect is evaluated, to not meeting the requirements of, re-use hole flushing device come and go several times boring is dredged, reaming, to ensure to obtain good extracting result.
The self-feeding bit that this method is used comprises the center self-oscillation nozzle of bit body and bit body, limit nozzle, middle part nozzle and posterior nozzle, and bit body has front platform and internal cavities; Described bit body front portion is spherical, and front end face is front platform, and Platform center and self-feeding bit axis arrange center self-oscillation nozzle, and platform is evenly arranged limit nozzle around center self-oscillation nozzle surrounding; Described bit body rear end is openend, is provided with internal thread for connecting high-pressure hose; The internal cavities of bit body is leading portion taper shape and the columniform combination cavity of back segment, and the tapering of conical section is
The propulsive mechanism that this method is used comprises frame, synchronous pulley, compression belt wheel, special-shaped synchronous cog belt, the air motor being with reductor, speed reducer output shaft, follower shaft, compression wheel shaft, compressor arm, spring, wing nut, conduit saddle mechanism, dust cover and corresponding link member.
A pair synchronous pulley is arranged in frame, one is driving wheel, is connected with the speed reducer output shaft of air motor, and another is driven pulley, connected by special-shaped synchronous cog belt between two belt wheels, the external surface of special-shaped synchronous cog belt has the U-lag mated with high-pressure hose external diameter.
Compressing belt wheel for a pair is arranged in frame by compressing wheel shaft, with synchronous pulley up and down just to coordinating, two compress between belt wheel by another special-shaped synchronous cog belt connection, there is provided propulsive force by special-shaped synchronous cog belt with the produced frictional force that fully contacts of high pressure hard tube, thus realize the compression to high-pressure resin pipe;
Compress one end of wheel shaft, spring and spring cup to be all enclosed within compressor arm, wing nut is screwed into compressor arm upper end and is tight against spring cup, lower spring end is pressed in and compresses on wheel shaft, can be made the spring-compressed on compressor arm by adjustment wing nut, realizes compressing belt wheel up-down adjustment;
Conduit saddle mechanism is arranged on whole propulsion plant foremost, it has adjustment stock, stock lower end is regulated to be arranged in frame by pivot pin, the rotation of different angles can be carried out around pivot pin, and in frame, multiple adjustment hole is set in same radius centered by pivot pin, regulate stock to be provided with an adjustment locating hole, regulate locating hole corresponding with each adjustment hole respectively and after being connected and fixed, realize the angular adjustment regulating stock, form the first order and regulate; Regulate the upper end adjusting bolt of stock to fix " T " font guide rail, guide rail can be rotated around adjustment stock upper end by adjusting bolt, forms secondary and regulates; A hole is respectively opened so that guide wheel shaft passes through in guide rail two ends, is with reeded directive wheel to install on guide wheel shaft, is space that high-pressure resin pipe passes through between two directive wheels; Guide wheel shaft two ends are fixed by pad and cottor pin, and have respectively overlapped an extension spring at two ends to keep the balance of overall guide wheel shaft and directive wheel;
Capstan winch described in this method for being wound around pitch tube, and realizes carrying out automatic unwrapping wire and take-up to pitch tube; Capstan winch and propulsive mechanism are all fixed on base, device can be made to correspond to the boring of diverse location and angle by each parts of adjusting base.
Described hole flushing method of the present invention has following characteristics:
1. have higher efficiency of breaking rock and pace when self-feeding bit is crept in soft seam, hole flushing efficiency is high; The middle nozzle of self-feeding bit is to the centralizing function of drill bit, and it is inclined effectively can to prevent and treat bit drills; Self-feeding bit is that high-pressure hose provides certain pulling force, makes high-pressure hose exceptionally straight, avoids high-pressure hose to cause bit drills inclined because of bending;
2. high-pressure hose has good pliability, when high-pressure resin hard tube is in progradation, avoids the situation generation blocked in the borehole because pitch tube is too hard;
3. high-pressure resin hard tube has suitable hardness, can bend and is wound around and bears, transmit certain thrust, compensate for self-feeding bit limits hole flushing degree of depth defect because tractive force is not enough, the hole flushing degree of depth is increased greatly; Pitch tube internal diameter is comparatively large, and water under high pressure can be made to pass through with the less pressure loss, meets self-feeding bit and breaks rock and creep into required hydraulic pressure;
4. this hole flushing method can carry out effective reaming to boring while hole flushing, improves gas pumping effect;
When 5. using this hole flushing method to carry out hole flushing to blocking, the boring of collapsing, even if to there is small deviation during hole, also can not cause and can not the phenomenon of hole flushing occur, avoid machine drilling because be difficult to hole can not the problem of hole flushing;
When 6. using this hole flushing method to carry out hole flushing to the boring blocking, collapse, because the diameter of pitch tube, high-pressure hose and self-feeding bit is less than the diameter of the gas pumping pipe in drainage holes, therefore, directly can enter hole flushing from drainage tube, avoid sealing of hole again;
7. compare mechanical drilling tool hole flushing, when adopting the hole flushing of this hole flushing method, there is not the steps such as the installation of drilling rod and withdrawal, greatly improve hole flushing efficiency.
The method, compared with the method for prior art, has easy to operate, can effectively realize fast to blocking, collapse boring carry out hole flushing order ground advantage, use when being mainly adapted at the extraction borehole of dredge blockage in lower permeability seam gas pumping process.
Accompanying drawing explanation
Fig. 1 is the structural representation of hole flushing device;
Fig. 2 is the left view of the self-feeding bit of hole flushing device;
Fig. 3 is A-A sectional drawing of self-feeding bit;
Fig. 4 is B-B sectional drawing of self-feeding bit;
Fig. 5 is the enlarged drawing of the center self-oscillation nozzle section of self-feeding bit;
Fig. 6 is the schematic diagram of nozzle drift angle, self-feeding bit limit and subtended angle;
Fig. 7 is the front view (not being with dust cover) of propulsion plant;
Fig. 8 is A-A sectional drawing of propulsion plant;
Fig. 9 is B-B sectional drawing of propulsion plant;
Figure 10 and Figure 11 is front view and E-E sectional drawing of propulsion plant conduit saddle mechanism.
Figure 12 a and Figure 12 b is front view and the top view of hole flushing device pedestal;
Figure 13 a and Figure 13 b is the top view of propulsive mechanism and bottom support frame on hole flushing device pedestal;
Figure 14 is the structural representation of hole flushing device capstan winch;
Figure 14 a is the A-A sectional drawing of Figure 14.
Drawing reference numeral illustrates:
1-water tank, 2-high-pressure pump, 3-capstan winch, 4-high pressure hard tube, 5-propulsive mechanism, 6-base, 7-high-pressure hose, 8-self-feeding bit;
5.1-frame, 5.2-special-shaped synchronous cog belt, 5.3-synchronous pulley, 5.4-sunk screw, 5.5-axle end baffle plate, 5.6-compress wheel shaft, 5.7-compress belt wheel, 5.8-compressor arm, 5.9-spring, 5.10-spring cup, 5.11-wing nut, 5.12-conduit saddle mechanism, 5.13-follower shaft, 5.14-round nut, 5.15-bearing pin (comprising cottor pin), 5.16-plain cushion, 5.17-bolt and and nut, 5.18-speed reducer output shaft, the air motor of 5.19-band reductor, 5.20-fillister head screw, 5.21-dust cover, 5.22-guide rail, 5.23-guide wheel shaft, 5.24-extension spring, 5.25-nylon directive wheel, 5.26-regulate stock, 5.27-regulate locating hole,
6.1-bottom support frame, 6.2-guide rail, 6.3-supporting leg, 6.4-fixed head, 6.5-additional body, 6.6-propulsive mechanism support;
8.1-front platform, 8.2-self-oscillation nozzle, 8.3-limit nozzle, 8.4-middle part nozzle, 8.5-posterior nozzle, 8.6-internal thread, 8.7-internal cavities, 8.8-upstream nozzle, 8.9-the self-excited oscillation cavity, 8.10-downstream nozzle.
3.1-manual wire-arranging mechanism, 3.2-high pressure sealing water tail, 3.3-spoke, 3.4-capstan winch baffle plate, 3.5-capstan winch central axis, the air motor of 3.6-band reductor.
Detailed description of the invention
Below in conjunction with accompanying drawing, the method for the invention is described further.
Main Function of the present invention be to underground coal mine blocking, boring of collapsing dredges, reaming, to improve gas pumping efficiency.Coal mine gas extraction borehole hole flushing method and technology principle of the present invention is: high-pressure resin pipe, high-pressure hose, self-feeding bit and high-pressure water shot stream generation apparatus, pitch tube be wound around with thrust unit in hole flushing process with the use of.The mash gas pumping drilling block underground coal mine, collapsed, utilizes the rock breaking capacity of self-advancing type water jet to carry out fragmentation, flushing to blocking, the part that collapses, to dredge, reaming to boring; The tractive force utilizing self-feeding bit to provide makes the exceptionally straight advance of high-pressure hose; And utilizing pitch tube to have certain rigidity, energy transmitting thrust characteristic, self-feeding bit is advanced in the larger context, and high-pressure hose then compensate for because of too large the caused defect of pitch tube hardness.Meanwhile, high-pressure hose has good pliability, avoids because pitch tube is too hard and blocks in the borehole.
As shown in Figure 1, this method adopts the boring hole flushing device that is made up of water tank (1), high-pressure pump (2), high pressure hard tube (4), high-pressure hose (7), self-feeding bit (8), base (6), capstan winch (3) and propulsive mechanism (5) to blocking, collapses that part is dredged, reaming.The water outlet of water tank connects high-pressure pump (2), high-pressure pump is connected with capstan winch (3) by high-voltage tube, and by high pressure sealing water tail, water under high pressure is flowed to the high pressure hard tube (4) be wrapped on capstan winch (3), high pressure hard tube (4) passed propulsive mechanism (5) before feeding boring, the propulsive force provided by propulsive mechanism makes high pressure hard tube be fed forward along boring, high pressure hard tube (4) front end connects high-pressure hose (7) and self-feeding bit (8) successively, and self-feeding bit (8) produces from entering thrust.
Hole flushing step is as follows:
(1) according to position and the angle of the hole that collapses, blocking boring, fix the bottom support frame of base (6), and adjust the length of propulsive mechanism support on the angle of supporting leg and guide rail on base and guide rail.
(2) then capstan winch (3) and propulsive mechanism (5) are fixed on base, and connect high pressure hard tube (4) and high-pressure hose (7) power pipeline, and connect self-feeding bit (8).
(3) water under high pressure produced by high-pressure pump flows to through piping and high pressure sealing water tail the high pressure hard tube be wrapped on capstan winch, high pressure hard tube can through propulsive mechanism before feeding boring, and the propulsive force provided by propulsive mechanism makes high pressure hard tube be fed forward along boring.
(4) when the high-pressure hose of water under high pressure through high pressure hard tube front end and self-feeding bit, self-feeding bit (8) produces high-pressure water jet and is divided into three parts: front jet, middle jet and rear jet.The rock of front jet to blocking, the part that collapses carries out fragmentation dredging, and has the effect of certain reaming; Middle jet has centralizing function to drill bit, can effectively prevent bit drills inclined; What rear jet was drill bit creep into provides and makes high-pressure hose exceptionally straight from entering power, the pulling force of whole power pipeline high-pressure hose above and below propulsive mechanism to the conveying that can realize long term distance under the acting in conjunction of the thrust that high pressure hard tube is provided by frictional force, thus realize the dredging to medium-length hole.
(5) after hole flushing, high pressure hard tube and high-pressure hose are regained by propulsive mechanism and capstan winch.
(6) after hole flushing, gas pumping effect is evaluated, to not meeting the requirements of, re-use hole flushing device come and go several times boring is dredged, reaming, to ensure to obtain good extracting result.
The power pipeline of this device is the high-pressure hose (7) of high pressure hard tube (4) and part, high pressure hard tube (4) adopts high-pressure resin pipe, high-pressure resin pipe can be wrapped on the capstan winch (3) of certain diameter, there is suitable hardness, can bend and be wound around and bear, transmit certain thrust, and pitch tube internal diameter is comparatively large, water under high pressure can be made to pass through with the less pressure loss, and its front end is connected with the high-pressure hose (7) with self-feeding bit.High-pressure hose has good pliability while can resisting high pressure.In the tractive force situation that self-advancing type flow jet flow drill provides, high-pressure hose is exceptionally straight state, avoids occurring because high-pressure hose bends the situation causing drill chuck in hole.Therefore, the power that advances of whole pipeline be high-pressure hose (7) above " pulling force " and the acting in conjunction power of " thrust " that provides of propulsive mechanism (5) below.Such progression hole flushing efficiency is high, and unlike mechanical hole flushing easy bit freezing.
As shown in Figures 2 to 6, this method have employed the self-feeding bit (8) of structure uniqueness, and it comprises the center self-oscillation nozzle (8.2) of bit body and bit body, limit nozzle (8.3), middle part nozzle (8.4) and posterior nozzle (8.5).Bit body has front platform (8.1) and internal cavities (8.7).Described bit body rear end is openend, is provided with internal thread (8.6) for connecting high-pressure hose.The internal cavities (8.7) of bit body is for leading portion is conical and the columniform combination cavity of back segment, and the tapering of conical section is
Self-feeding bit (8) front portion is spherical, front end is a platform (8.1), Platform center arranges center self-oscillation nozzle (8.2), its surrounding is evenly arranged the limit nozzle (8.3) with certain subtended angle α and drift angle β, as shown in figure 12, subtended angle α is defined as with drift angle β: will cross limit nozzle starting point c and the straight line cc ＇ parallel with drill axis oo ＇ is defined as straight line one, straight line one and drill axis determined plane oo ＇ d ＇ d are defined as plane one; With straight line one for baseline, first in plane one, deflect certain angle to jet exit direction, limit to the direction away from drill axis, this angle initialization is subtended angle α, now nozzle-axis ce is defined as straight line two; Again by straight line two with limit nozzle starting point for initial point, with straight line one for axis of rotation, rotate certain cone angle, the nozzle-axis cf of gained is defined as straight line three, be the actual axis of front nozzle, now the angle of projection ec ＇ on self-feeding bit cross section of straight line two and straight line three and fc ＇ be set as drift angle β.All limits nozzle is all according to said method evenly arranged, and the angle and direction of deflection is all consistent.The middle part nozzle (8.4) in cross-section with certain deviation angle θ is evenly distributed with in the middle part of drill bit, as shown in Figure 9, cross section referred to the middle part axis of nozzle and the plane vertical with drill axis, and deviation angle θ refers to the middle part axis of nozzle and the angle of radial radius.Drill bit rear end is openend, inside is provided with internal thread (8.6) for connecting high-pressure hose, being evenly arranged above it with axis is the posterior nozzle (8.5) of certain cone angle Φ, and as shown in Figure 2, cone angle Φ refers to the axis of posterior nozzle and the angle of drill axis.
Composition graphs 2 and Fig. 4 visible, the number of limit nozzle (8.3) is 3-4, nozzle diameter is 0.5mm-1.0mm, distribution radius R1 is 1.0mm-10.0mm, subtended angle α is between 15 °-30 °, be preferably 25 °, drift angle β is between 60 °-90 °, and optimum is 360 °/n (n refers to limit nozzle number).Distribution radius R1 refers to the distance of limit injection stream export center to drill axis.
Composition graphs 3 is visible, and the front-end platform (8.1) of drill bit reduces the overall dimensions of drill bit, and be convenient on platform, get out center self-oscillation nozzle (8.2) and limit nozzle (8.3), its radius R 2 is 10.5mm-4.0mm.The number of posterior nozzle (8.5) is 6-8, and nozzle diameter is 0.5mm-1.5mm, and axial cone angle Φ is between 10 °-30 °, and optimum is 25 °.Bit body inside is cone and cylindrical combination cavity, combines the cone angle of cavity conical section between 20 °-45 °, this cone angle
selection principle be make the local losses of jet minimum, easy to process.
Composition graphs 4 is visible, and the number of middle part nozzle (8.4) is 3-4, and nozzle diameter is that 0.5mm-1.0mm, deviation angle θ are between 30 °-45 °.The Main Function of middle part nozzle is centralizing function, and it is more weak that broken rock repaiies hole effect, and the moment that the recoil strength of its jet produces simultaneously can make drill bit tighten.Therefore, can not too greatly can not be too little,
Composition graphs 5 is visible, and center self-oscillation nozzle (8.2) is arranged on self-feeding bit axis, is made up of successively upstream nozzle (8.8), the self-excited oscillation cavity (8.9) and downstream nozzle (8.10).Self-oscillation cavity length L is generally 2.3 ~ 3.3 times of upstream nozzle diameter d 1, and downstream nozzle diameter d 2 is generally 1.2 ~ 1.3 times of upstream nozzle diameter d 1.The main body of the self-excited oscillation cavity (8.9) is cylindrical cavity, and its diameter is 18 times of upstream nozzle diameter d 1; The vertical section of cavity is laterally zygomorphic parallelogram, and cavity upstream and downstream nozzle impingement wall is taper surface, and upstream nozzle impact walls is upstream convex, and downstream nozzle impact walls is recessed to downstream.
The nozzle of self-propelled high pressure water jet drill bit all directions has following effect:
1. the jet through central nozzle ejection has comparatively macro-energy, forms darker boring direct impact in rib process;
2. limit nozzle produce jet and axial direction angled, make the jet of ejection at a high speed have higher tangential velocity and produce higher shearing stress, can play front rib and hit and degrade effect, thus expand boring, for the advance of drill bit and high-pressure hose provides passage;
3. through in nozzle produce high-speed jet spray perpendicular to drill hole wall, in drill hole wall scour process, make drill bit can not be close to hole wall and creep into, prevent bit drills inclined.Meanwhile, the vertical jet sprayed by the crack of hole wall, crack fully " opening ", can obtain better extracting result;
4. spray high-speed jet through rear nozzle contrary with drill bit advancing direction and should have certain angle with axial direction, meanwhile, the injection flow of rear nozzle should be larger than the flow of front nozzle.The Main Function of rear nozzle comprises: for drill bit provides thrust, the advance of traction high-pressure hose, gets rid of drilling cuttings and reaming.
One of another key point of the present invention have employed propulsive mechanism (5), see Fig. 7 to Figure 11, it comprises frame (5.1), synchronous pulley (5.3), compress belt wheel (5.7), special-shaped synchronous cog belt (5.2), air motor (5.19) with reductor, speed reducer output shaft (5.18), follower shaft (5.13), compress wheel shaft (5.6), threaded compressor arm (5.8), spring (5.9), wing nut (5.11), conduit saddle mechanism (5.12), dust cover (5.21) and corresponding link member.
See Fig. 7, Fig. 8 and Fig. 9, the upper and lower both sides of high-pressure hose are respectively symmetrical arranged a pair belt wheel, and downside is drive pulley (5.3), comprises driving pulley and driven pulley, upside, for compressing belt wheel (5.7), is installed in frame (5.1).Driving pulley (5.3) is connected by the air motor (5.19) of speed reducer output shaft (5.18) with band reductor, the special-shaped synchronous cog belt (5.2) having and be with U-shaped groove is overlapped between driving pulley and driven pulley (5.3), when air motor (5.19) drive driving pulley (5.3) rotate time, driven pulley (5.3) by special-shaped synchronous cog belt (5.2) effect next play rotation.Air motor (5.19) used has explosion-proof performance, adopt piston type pneumatic motor more, rotating can be realized, also stepless time adjustment can be carried out, rotating speed is relatively slow, but the moment of torsion provided is large, and carry out adjusting rotary speed by adjusting air inflow quantity, thus match from not different rate of penetrations in the same time.
The compressor arm (5.8) compressing belt wheel (5.7) be a top is cylinder bottom is cubical rod member, and Upper cylindrical is threaded, its size and wing nut (5.11) supporting, the cubical cross section in bottom is square, and its size is supporting with compression wheel shaft (5.6).
The left side compressing wheel shaft (5.6) is cylindrical drive shaft, and the right is hollow cubic body, and its size can make it just be enclosed within the cube of compressor arm (5.8) bottom, thus realizes moving up and down of contact roller.
Whole compressor arm (5.8) is welded in the frame (5.1) of propulsion plant.Compress on wheel shaft (5.6) and install contact roller (5.7), between two contact rollers (5.7), cover has identical special-shaped synchronous cog belt (5.2).Holddown spring lid (5.10) and spring (5.9) is come by the wing nut (5.11) tightened on compressor arm (5.8), thus promote moving down of contact roller (5.7), complete the compression to high-pressure hose, providing of frictional force is provided.This compression mode has certain elasticity, can work under bad environment.
As shown in Figure 10 and Figure 11, propulsion plant front end is a conduit saddle mechanism (5.12), and it forms by regulating stock (5.26), nylon directive wheel (5.25), guide rail (5.22), extension spring (5.24) and other link member.Stock (5.26) lower end is regulated to be arranged in frame (5.1) by pivot pin, the rotation of different angles can be carried out around pivot pin, and in frame, multiple adjustment hole is set in same radius centered by pivot pin, stock is regulated to be provided with an adjustment locating hole (5.27), regulate locating hole corresponding with each adjustment hole respectively and be fixed on the angle of a certain needs by screw bolt and nut, realize the angular adjustment regulating stock, the formation first order regulates, and this is that the first order regulates.Regulate the upper end bolt of stock (5.26) to secure a guide rail (5.22), guide rail (5.22) is " T " font, and a hole is respectively opened so that guide wheel shaft (5.23) passes through in two ends; With reeded nylon directive wheel (5.25) string on one side of guide wheel shaft (5.23), be space that high-pressure resin pipe passes through between two directive wheels (5.25); Guide wheel shaft (5.23) two ends are fixed by pad (5.16) and cottor pin (5.15), and have respectively overlapped an extension spring (5.24) at two ends to keep the balance of overall guide wheel shaft (5.23) and directive wheel (5.25); Regulate the whole front end of stock (5.26) it can be made along with guide rail (5.22) is around screws by adjusting bolt, be convenient in feeding hole level and smooth for high-voltage tube, thus avoid high-voltage tube excessive at the too urgent resistance that causes of port wall turning, this is that the second level regulates.Whole deposit mechanism regulates stock (5.26) and the second level to regulate guide rail (5.22) to realize high-pressure resin pipe to send into smoothly in the boring at diverse location and inclination angle by the first order.
In addition, whole propulsion plant aluminium alloy sheet dust cover (5.21) protection, can effectively reduce entering of dust, improves propelling effect and the application life of mechanism, ensures the safety of operating personnel.
See Figure 12 a, Figure 12 b, Figure 13 a and Figure 13 b, the base (6) of this device is made up of bottom support frame (6.1), supporting leg (6.3), guide rail (6.2), propulsive mechanism support (6.6), additional body (6.5) and fixed head (6.4) etc.
Bottom support frame (6.1) surrounding is hinged with folding additional body (6.5), when it is extended, increases the tactile floor space of base, thus ensures the stability of whole base.The lower end of supporting leg (6.3) and guide rail (6.2) is all hinged on bottom support frame (6.1), guide rail (6.2) is upper installs propulsive mechanism support (6.6), (6.6) are distributed with a series of adjustment hole to propulsive mechanism support along its length, be connected with guide rail (6.2) by adjustment hole, realize the adjustment of propulsive mechanism support (6.6) flexible length on guide rail; The upper end of supporting leg (6.3) adopts adjustment screw to be connected with the adjustment hole of propulsive mechanism support (6.6), thus regulates the angle of guide rail (6.2); On the bottom support frame (6.1) that capstan winch (3) and propulsive mechanism (5) are separately fixed at base respectively by fixed head (6.4) and propulsive mechanism support (6.6), position is all adjustable, the adjustment of the angle of its middle guide and the length of propulsive mechanism support significantly regulates, and is boring for differing heights and different angles and regulates; And to design fixed head be adjustment among a small circle, be convenient to install capstan winch and propulsive mechanism on the one hand, be conducive to being fixed on suitable installation site on the other hand, make it coordinate mutually with complete equipment.Whole understructure is simple, easy to adjust, is applicable to adjust the boring of diverse location and angle in the narrow space of underground coal mine.
As shown in Figure 14 and Figure 14 a, the capstan winch (3) of this device is made up of the air motor (3.6) of capstan winch baffle plate (3.4), spoke (3.3), high pressure sealing water tail (3.2), capstan winch central axis (3.5), band reductor and manual wire-arranging mechanism (3.1) etc.Capstan winch baffle plate (3.4) and spoke (3.3) constitute the winding disc of high pressure hard tube (4), and its turning cylinder is capstan winch central axis (3.5); Be high pressure sealing water tail (3.2) in one end of central axis (3.5), for connecting the pressure duct of high-pressure pump (2); Central axis (3.5) other end is the air motor (3.6) of band reductor, drives winding disc to rotate, realizes unwrapping wire and the take-up of high pressure hard tube (4); The fltting speed of the payingoff speed of capstan winch (3) and propulsive mechanism (5) can be made synchronous by the air inflow of governor motor (3.6), and it can be made to reverse carry out take-up; Be a manual wire-arranging mechanism (3.1) in the front end of capstan winch (3), manual winding displacement can be carried out to capstan winch.
The foregoing is only the schematic detailed description of the invention of the present invention; and be not used to scope surely of the present invention; on the basis of technology disclosed by the invention and scheme; those skilled in the art can according to technology contents disclosed in this patent; do not need performing creative labour just can make some modifications and variations to some technical characteristics wherein, these modifications and variations are all in protection scope of the present invention.
Claims (6)
1. the hole flushing method of coal mine gas extraction borehole, it is characterized in that: described method adopts the hole flushing device be made up of water tank (1), high-pressure pump (2), high pressure hard tube (4), high-pressure hose (7), self-feeding bit (8), base (6), capstan winch (3) and propulsive mechanism (5), and step is as follows:
(1) according to position and the angle of the hole that collapses, blocking boring, fix the bottom support frame of base (6), and adjust the length of propulsive mechanism support on the angle of supporting leg and guide rail on base and guide rail;
(2) then capstan winch (3) and propulsive mechanism (5) are fixed on base (6), and connect the power pipeline that high pressure hard tube (4) and high-pressure hose (7) form, connect self-feeding bit (8);
(3) water under high pressure produced by high-pressure pump (2) flows to through piping and high pressure sealing water tail the high pressure hard tube be wrapped on capstan winch, high pressure hard tube is through propulsive mechanism before feeding boring, and the propulsive force provided by propulsive mechanism makes high pressure hard tube be fed forward along boring;
(4) when the high-pressure hose of water under high pressure through high pressure hard tube front end and self-feeding bit, self-feeding bit (8) produces high-pressure water jet and is divided into front jet, middle jet and rear jet three part; The rock of front jet to blocking, the part that collapses carries out fragmentation dredging, and has the effect of certain reaming; Middle jet has centralizing function to drill bit, prevents bit drills inclined; What rear jet was drill bit creep into provides and makes high-pressure hose exceptionally straight from entering power, the pulling force of whole power pipeline high-pressure hose above and below propulsive mechanism to realizing long term distance conveying under the acting in conjunction of the thrust that high pressure hard tube is provided by frictional force, thus realize the dredging to medium-length hole;
(5) after hole flushing, high pressure hard tube and high-pressure hose are regained by propulsive mechanism and capstan winch;
(6) after hole flushing, gas pumping effect is evaluated, to not meeting the requirements of, re-use hole flushing device come and go several times boring is dredged, reaming, to ensure to obtain good extracting result;
Described self-feeding bit (8) comprises center self-oscillation nozzle (8.2), limit nozzle (8.3), middle part nozzle (8.4) and posterior nozzle (8.5) on bit body and bit body; Described bit body front portion is spherical, front end face is front platform (8.1), Platform center and self-feeding bit axis arrange center self-oscillation nozzle (8.2), platform is evenly arranged limit nozzle (8.3) around center self-oscillation nozzle (8.2) surrounding; Described bit body rear end is openend, is provided with internal thread (8.6) for connecting high-pressure hose; Bit body has internal cavities (8.7), and it is leading portion taper shape and the columniform combination cavity of back segment, and the tapering of conical section is
Described propulsive mechanism (5) comprises frame (5.1), synchronous pulley (5.3), compression belt wheel (5.7), special-shaped synchronous cog belt (5.2), the air motor (5.19) being with reductor, speed reducer output shaft (5.18), follower shaft (5.13), compresses wheel shaft (5.6), compressor arm (5.8), spring (5.9), wing nut (5.11), conduit saddle mechanism (5.12) and corresponding link member;
A pair synchronous pulley (5.3) is arranged in frame (5.1), one is driving wheel, be connected with the speed reducer output shaft (5.18) of air motor (5.19), another is driven pulley, connected by special-shaped synchronous cog belt (5.2) between two belt wheels, the external surface of special-shaped synchronous cog belt has the U-lag mated with high-pressure hose external diameter;
Compressing belt wheel (5.7) for a pair is arranged in frame (5.1) by compressing wheel shaft (5.6), with synchronous pulley (5.3) up and down just to coordinating, two compress between belt wheel (5.7) by the connection of another special-shaped synchronous cog belt (5.2), there is provided propulsive force by special-shaped synchronous cog belt (5.2) with the produced frictional force that fully contacts of high pressure hard tube (4), thus realize the compression to high-pressure resin pipe;
Compressing one end of wheel shaft (5.6), spring (5.9) and spring cup (5.10) is all enclosed within compressor arm (5.8), wing nut is screwed into compressor arm (5.8) upper end and is tight against spring cup (5.10), spring (5.9) lower end is pressed in and compresses on wheel shaft (5.5), by regulating wing nut (5.11) that the spring (5.9) on compressor arm (5.8) can be made to compress, realize compressing belt wheel (5.7) up-down adjustment;
Conduit saddle mechanism (5.12) is arranged on whole propulsion plant foremost, it has adjustment stock (5.26), stock (5.26) lower end is regulated to be arranged in frame (5.1) by pivot pin (5.15), the rotation of different angles can be carried out around pivot pin, and in frame, multiple adjustment hole is set in same radius centered by pivot pin, stock is regulated to be provided with an adjustment locating hole (5.27), regulate locating hole corresponding with each adjustment hole respectively and after being connected and fixed, realize the angular adjustment regulating stock, form the first order and regulate; Regulate the upper end adjusting bolt of stock (5.26) to fix " T " font guide rail (5.22), guide rail (5.22) can be rotated around adjustment stock (5.26) upper end by adjusting bolt, forms secondary and regulates; A hole is respectively opened so that guide wheel shaft (5.23) passes through in guide rail (5.22) two ends, being with reeded directive wheel (5.25) to install on guide wheel shaft (5.23), is space that high-pressure resin pipe passes through between two directive wheels (5.25); Guide wheel shaft (5.23) two ends are fixed by pad (5.16) and cottor pin (5.15), and have respectively overlapped an extension spring (5.24) at two ends to keep the balance of overall guide wheel shaft (5.23) and directive wheel (5.25);
Capstan winch (3) is wound around high pressure hard tube (4), and realizes carrying out automatic unwrapping wire and take-up to high pressure hard tube;
Capstan winch (3) and propulsive mechanism (5) are all fixed on base (6), device can be made to correspond to the boring of diverse location and angle by each parts of adjusting base.
2. the hole flushing method of coal mine gas extraction borehole according to claim 1, is characterized in that: described base (6) is made up of bottom support frame (6.1), supporting leg (6.3), guide rail (6.2), propulsive mechanism support (6.6), additional body (6.5) and fixed head (6.4); Bottom support frame (6.1) surrounding is hinged with folding additional body (6.5), keeps the stability of whole base; The lower end of supporting leg (6.3) and guide rail (6.2) is all hinged on bottom support frame (6.1), guide rail (6.2) is upper installs propulsive mechanism support (6.6), (6.6) are distributed with a series of adjustment hole to propulsive mechanism support along its length, be connected with guide rail (6.2) by adjustment hole, realize the adjustment of propulsive mechanism support (6.6) flexible length on guide rail; The upper end of supporting leg (6.3) adopts adjustment screw to be connected with the adjustment hole of propulsive mechanism support (6.6), thus regulates the angle of guide rail (6.2); On the bottom support frame (9) that capstan winch (3) and propulsive mechanism (5) are separately fixed at base respectively by fixed head (6.4) and propulsive mechanism support (6.6), position is all adjustable.
3. the hole flushing method of coal mine gas extraction borehole according to claim 1, it is characterized in that: platform (8.1) radius R 2 of described self-feeding bit (8) is 10.5mm-4.0mm, the number of limit nozzle (8.3) is 3-4, nozzle diameter is 0.5mm-1.0mm, distribution radius R1 around Platform center is 1.0mm-10.0mm, and the limit nozzle (8.3) of described self-feeding bit has subtended angle α and drift angle β; Subtended angle α is between 15 °-30 °, and drift angle β is between 60 °-90 °; Limit nozzle setting is: determine to be some limit nozzle starting point in front platform (8.1) upper distance drill axis 1.0mm-10.0mm distance, to cross limit nozzle starting point and the straight line parallel with drill axis is defined as straight line one, straight line one and the determined plane definition of drill axis are plane one; With straight line one for baseline, first in plane one, deflect certain angle to jet exit direction, limit to the direction away from drill axis, this angle initialization is subtended angle α; Now nozzle-axis is defined as straight line two; Again by straight line two with limit nozzle starting point for initial point, with straight line one for axis of rotation, rotate certain cone angle, the nozzle-axis of gained is defined as straight line three, be the actual axis of limit nozzle, now the angle that straight line two and straight line three project on self-feeding bit cross section be set as drift angle β; All limits nozzle is all according to said method evenly arranged, and the angle and direction of deflection is all consistent.
4. the hole flushing method of coal mine gas extraction borehole according to claim 1, it is characterized in that: in the middle part of the bit body of described self-feeding bit (8), be evenly distributed with the middle part nozzle (8.4) in cross-section with deviation angle θ, the number at described middle part nozzle (8.4) is 3-4, nozzle diameter is 0.5mm-1.0mm, deviation angle θ is between 30 °-45 °, deviation angle θ refers to the middle part axis of nozzle and the angle of radial radius, the axis of nozzle in the middle part of cross section referred to and the plane vertical with drill axis.
5. the hole flushing method of coal mine gas extraction borehole according to claim 1, it is characterized in that: the bit body rear end sidewall of described self-feeding bit (8) being evenly arranged with bit body axis is the posterior nozzle (8.5) of cone angle Φ, the number of posterior nozzle is 6-8, nozzle diameter is 0.5mm-1.5mm, axial cone angle Φ is between 10 °-30 °, and axial cone angle Φ refers to the axis of posterior nozzle and the angle of drill axis.
6. the hole flushing method of coal mine gas extraction borehole according to claim 1, is characterized in that: described self-oscillation nozzle (8.2) is made up of upstream nozzle (8.8), the self-excited oscillation cavity (8.9) and downstream nozzle (8.10) successively; Self-oscillation cavity length L is 2.3 ~ 3.3 times of upstream nozzle diameter d 1, and downstream nozzle diameter d 2 is 1.2 ~ 1.3 times of upstream nozzle diameter d 1; The main body of the self-excited oscillation cavity (8.9) is cylindrical cavity, and its diameter is 18 times of upstream nozzle diameter d 1; The vertical section of cavity is laterally zygomorphic parallelogram, and cavity upstream and downstream nozzle impingement wall is taper surface, and upstream nozzle impact walls is upstream convex, and downstream nozzle impact walls is recessed to downstream.
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| CN106194074A (en) * | 2016-08-31 | 2016-12-07 | 永煤集团股份有限公司 | Leting speeper boring to hole device and leting speeper drilling tool to hole method |
| CN108086929A (en) * | 2018-01-09 | 2018-05-29 | 长江大学 | A kind of adaptive hydraulic cyclone flushing tool in underground |
| CN108798533A (en) * | 2018-07-19 | 2018-11-13 | 中交第航务工程局有限公司 | A kind of drilling rod dredger for DCM ships |
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| CN108086929B (en) * | 2018-01-09 | 2024-03-22 | 长江大学 | Downhole self-adaptive hydrocyclone flushing tool |
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| CN113107578A (en) * | 2021-04-09 | 2021-07-13 | 河南理工大学 | Coal seam drilling hole combined blockage removal method for pneumatic regrinding powder discharge and chemical suspension powder discharge |
| CN113107578B (en) * | 2021-04-09 | 2022-05-20 | 河南理工大学 | Coal seam drilling hole combined blockage removal method for pneumatic regrinding powder discharge and chemical suspension powder discharge |
| CN112963111A (en) * | 2021-04-12 | 2021-06-15 | 中煤科工集团重庆研究院有限公司 | Hydraulic-driven automatic dredging device for gas extraction drill hole |
| CN113944431A (en) * | 2021-12-20 | 2022-01-18 | 成都迪普金刚石钻头有限责任公司 | Hydraulic auxiliary rock breaking PDC drill bit and auxiliary rock breaking method |
| CN117600722A (en) * | 2024-01-23 | 2024-02-27 | 深圳绿源轩电子技术有限公司 | Automatic welding device for megasonic vibrating plate |
| CN117600722B (en) * | 2024-01-23 | 2024-04-02 | 深圳绿源轩电子技术有限公司 | Automatic welding device for megasonic vibrating plate |
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