CN110761714A - Method and device for pushing and pulling pipe of coal mine gas extraction protective hole - Google Patents
Method and device for pushing and pulling pipe of coal mine gas extraction protective hole Download PDFInfo
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- CN110761714A CN110761714A CN201911013167.0A CN201911013167A CN110761714A CN 110761714 A CN110761714 A CN 110761714A CN 201911013167 A CN201911013167 A CN 201911013167A CN 110761714 A CN110761714 A CN 110761714A
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- 239000003245 coal Substances 0.000 title claims abstract description 63
- 238000000605 extraction Methods 0.000 title claims abstract description 41
- 238000000034 method Methods 0.000 title claims abstract description 24
- 230000001681 protective effect Effects 0.000 title description 3
- 239000002893 slag Substances 0.000 claims abstract description 34
- 238000007599 discharging Methods 0.000 claims abstract description 23
- 238000007789 sealing Methods 0.000 claims description 19
- 239000000428 dust Substances 0.000 claims description 15
- 239000002817 coal dust Substances 0.000 claims description 8
- 238000004140 cleaning Methods 0.000 claims description 5
- 238000003780 insertion Methods 0.000 claims description 4
- 230000037431 insertion Effects 0.000 claims description 4
- 238000010276 construction Methods 0.000 claims description 3
- 239000007788 liquid Substances 0.000 claims description 2
- 239000000178 monomer Substances 0.000 claims 1
- 239000013049 sediment Substances 0.000 claims 1
- 238000011084 recovery Methods 0.000 abstract description 2
- 239000003818 cinder Substances 0.000 description 6
- 238000005553 drilling Methods 0.000 description 6
- 238000005065 mining Methods 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B7/00—Special methods or apparatus for drilling
- E21B7/20—Driving or forcing casings or pipes into boreholes, e.g. sinking; Simultaneously drilling and casing boreholes
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B19/00—Handling rods, casings, tubes or the like outside the borehole, e.g. in the derrick; Apparatus for feeding the rods or cables
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B21/00—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/13—Methods or devices for cementing, for plugging holes, crevices or the like
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F7/00—Methods or devices for drawing- off gases with or without subsequent use of the gas for any purpose
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- Auxiliary Devices For Machine Tools (AREA)
Abstract
The invention relates to a coal mine gas extraction hole-protecting pipe pushing and pulling method and a device, belonging to the technical field of gas extraction; the hole protecting pipe is clamped and fixed through the clamping device, the clamping device is connected with the driving device, the clamping device rotates along with the driving device under the driving of a gear of the driving device, the hole protecting pipe is pushed to enter a drilled hole through a pneumatic motor, meanwhile, the tail end of the hole protecting pipe is connected with the slag discharging device, coal slag and the like are continuously discharged, and when the hole protecting pipe needs to be taken out, the pushing and pulling pipe device is reversely arranged on the last section of the hole protecting pipe to be pulled out; the invention can suck out the coal slag in the drill hole in time, is convenient to insert the hole protecting pipe into the drill hole, can pull out the hole protecting pipe in the drill hole, and can discharge the coal slag in the drill hole when the hole protecting pipe is pulled out, thereby realizing the recovery and the repeated utilization of the hole protecting sieve pipe, reducing the gas extraction cost in a soft coal layer, preventing hole collapse and improving the gas extraction quantity.
Description
Technical Field
The invention belongs to the technical field of gas extraction, and relates to a method and a device for protecting holes in coal mine gas extraction, in particular to a method and a device for protecting holes in a recoverable reusable sieve tube in coal mine gas extraction, which are particularly suitable for soft high-gas coal seams.
Background
The coal bed firmness coefficient difference (f is less than 1) of most high gas and coal and gas outburst mines in China, the mining depth is gradually increased along with the mining, and a plurality of shallow low gas mines can be converted into deep high gas mines. The soft coal layer is caused by fault and layer slip, and is mainly composed of crushed coal and minced coal, and the strength of the coal body is low. If the borehole is drilled into a soft coal seam, the borehole will often collapse and fail. In gas extraction, the failed drill hole can not effectively extract gas in the coal seam, so that the residual gas in the coal seam can become hidden danger of gas disaster accidents, the collapse of the drill hole is prevented, and the key of gas control in the soft coal seam is to improve the effective length of the drill hole.
The screen pipe hole protecting technology is formed under the condition that the geological conditions are more and more complicated along with the expansion of production scale. When drilling in a soft coal seam, in order to avoid collapse and blockage of the drill hole caused by unstable hole walls and other reasons, after the drilling operation is completed, a PVC or PE sieve tube is arranged in the drill hole and used as a hole protecting tube and an extraction tube. The large amount of coal slag deposited near the screen can make the screen difficult to extract due to the borehole collapse. In the subsequent coal mining process, the sieve tube is damaged by a coal mining machine and then is conveyed out together with coal. However, the sieve tube made of the PVC pipe is relatively expensive, and if the sieve tube is used only once, a large number of sieve tubes are needed in the gas extraction stage, which causes waste of the PVC pipe and increases the cost of gas extraction. During hole protection operation, a large amount of coal slag is left in a drilled hole, and if the coal slag cannot be removed in time, the resistance of a hole sealing pipe is too large, and a lower pipe fails; during the pipe drawing operation, the local collapse coal body covers the pipe wall, and if the local collapse coal body cannot be cleaned, the hole protection pipe cannot be drawn out.
"an inflatable drilling and sealing section residue cleaning device and a use method thereof" with the publication number of CN108204213A, which is disclosed in patent number 6, 26.2018, ensure that the cleaning work is smoothly carried out by utilizing the position relationship of two forms of inflation and non-inflation of an expansion device; the invention discloses a method for sending a hole protecting pipe of a gas extraction hole of a soft coal seam with the publication number of CN102587961A in 7, 18 and 2012 of Chinese invention patent, wherein when the hole protecting and sending extraction pipe enters a drill hole, high-pressure air is pressed into the extraction pipe, the air flows out from the position between the wall of the drill hole and the extraction pipe, and simultaneously, generated coal slag is discharged, so that the problems of large resistance and the like caused by the coal slag are solved; a pipe drawing device and a pipe drawing machine disclosed in patent No. CN206971090U of Chinese invention patent 2018, 2, 6 and are connected with an outer ring through a slider device to form a pipeline channel which can be used for drawing out a pipeline.
Disclosure of Invention
The invention overcomes the defects of the prior art, provides a method and a device for pushing and pulling a hole-protecting pipe for coal mine gas extraction, and aims to suck out coal slag in a drill hole in time, conveniently insert the hole-protecting pipe into the drill hole, pull out the hole-protecting pipe in the drill hole, discharge the coal slag in the drill hole when pulling out the hole-protecting pipe, realize the recovery and the repeated utilization of a hole-protecting sieve pipe, and solve the problem that the coal slag in the drill hole influences the pipe insertion and the pipe pulling.
In order to achieve the above object, the present invention is achieved by the following technical solutions.
A coal mine gas extraction hole protecting push-pull pipe device comprises a clamping device, a driving device and a slag discharging device, wherein the clamping device comprises a clamp holder, a baffle and a bearing, the baffle is installed inside the bearing and is matched with the inner diameter of the bearing, so that the baffle can rotate relative to the bearing, and the bearing is arranged on a plane supporting plate through a fixing support; a clamp holder for clamping the hole protection pipe is arranged in the center of the baffle plate, and the axis of the clamp holder is communicated with the drill hole; the driving device comprises pneumatic single columns, connecting rods, a pneumatic motor, a driven gear and a driving gear, the supporting plate is provided with a slide way, the pneumatic motor is arranged on the slide way and can slide back and forth along the slide way, and the fixed ends of the pneumatic single columns are respectively fixed with the outer circumference of the baffle; the shaft center of the driving gear is connected with a pneumatic motor through a connecting rod, the pneumatic motor is used for driving the driving gear to rotate forwards and reversely, the driven gear is meshed with the driving gear, the holder is fixed with the driven gear, the holder is driven by the driven gear to rotate, the holder is connected with the telescopic rod end of the pneumatic single support, and the tail end of the hole protecting pipe is connected with the slag discharging device.
Furthermore, the slag discharging device is a negative pressure dust collector.
Furthermore, the bottom of the supporting plate is connected with a lifting support.
Furthermore, a supporting device for supporting the clamper is arranged on the supporting plate.
Furthermore, the gripper is connected with the telescopic rod ends of the two pneumatic single support columns which are arranged in parallel.
Furthermore, the hole protecting pipes are of a multi-section structure, each section of hole protecting pipe is connected through threads, and anti-falling pins are arranged at the threads and penetrate through male and female connectors of the two sections of hole protecting pipes.
A method for pushing and pulling a coal mine gas extraction protective hole comprises the following steps:
the method comprises the following steps: after the drilling construction is finished, inserting the head end of a first section of hole protecting pipe into a drilled hole, inserting the pipe body of the first section of hole protecting pipe into the push-pull pipe device, connecting the tail end pipe orifice of the first section of hole protecting pipe with the slag discharging device, pushing the first section of hole protecting pipe into the drilled hole while rotating by using the push-pull pipe device, and simultaneously starting the slag discharging device to suck out pulverized coal in the drilled hole.
Step two: the head end of a second section of hole protecting pipe is connected with the tail end of a first section of hole protecting pipe, a slag discharging device is connected with the tail end pipe orifice of the second section of hole protecting pipe, the second section of hole protecting pipe is pushed into the drill hole while rotating by using the push-pull pipe device, and the slag discharging device is started to suck out the coal dust in the drill hole in the pushing process; repeating the step to push the hole protecting pipes into the drilled holes one by one; the push and pull tube device is removed.
Step three: sleeving the hole sealing pipe at the tail end of the hole protecting pipe, inserting hole sealing liquid for the hole sealing pipe into the drilled hole to seal the hole, and connecting a gas extraction pipe after hole sealing; and connecting the slag discharging device with the tail end of the last section of hole protecting pipe.
Step four: and when the gas extraction time of the drill hole exceeds the design period, reversely installing the pipe pushing and pulling device at the tail end of the last section of hole protecting pipe, connecting the slag discharging device with the pipe orifice at the tail end of the last section of hole protecting pipe, pulling out the hole protecting pipe while rotating, and cleaning coal scraps in the drill hole.
Preferably, the hole protecting pipe comprises a sieve mesh hole protecting pipe and a sieve mesh-free hole protecting pipe which have the same diameter, and the diameter of the sieve mesh hole protecting pipe and the density of the sieve mesh are both gradually reduced along with the increase of the depth of the drilled hole.
Preferably, the slag discharging device is a negative pressure dust collector, and the suction force of the negative pressure dust collector is increased along with the increase of the insertion depth of the hole protecting pipe.
Preferably, the inner diameter of the hole sealing pipe is 1.4-1.6 times of the outer diameter of the hole protecting pipe.
Compared with the prior art, the invention has the beneficial effects that.
According to the invention, each section of hole protecting pipe is inserted into a drill hole in a combined manner, in order to prevent the drill hole from being blocked by coal cinder and coal dust, the hole protecting pipe cannot be inserted, the coal cinder and the coal dust in the drill hole are sucked out through a negative pressure dust collector all the time in the pushing process, after the hole protecting pipe is sent to a final hole position, hole sealing is carried out through the hole sealing pipe, then a gas extraction pipe is connected externally for gas extraction, after the gas extraction is finished, the hole protecting pipe is pulled out through external force, in order to prevent the coal cinder and the coal dust from being not pulled out after the drill hole is blocked, the coal cinder and the coal dust are sucked out through the negative pressure dust collector all the time in the pulling process, in the process of pushing in and pulling out the hole protecting pipe, the hole protecting pipe can be pushed in and pulled out while rotating in order to facilitate labor saving; the device can suck out the coal cinder in the drill hole in time, the hole protecting pipe can be conveniently inserted into the drill hole, the hole protecting pipe in the drill hole can be pulled out, the coal cinder in the drill hole is discharged when the hole protecting pipe is pulled out, the hole protecting sieve pipe is recycled and reused, the gas extraction cost in a soft coal seam is reduced, hole collapse is prevented, and the gas extraction amount is increased.
Drawings
Fig. 1 is a schematic view of the construction of the hole-protecting device according to the present invention in use.
Fig. 2 is a schematic structural diagram of the hole-protecting device of the present invention.
Fig. 3 is a schematic view of the hole guard device according to the present invention, wherein the driving gear drives the driven gear to rotate.
Fig. 4 is a schematic view of the connection of the pneumatic single column, the chuck and the bearing of the hole protecting device.
The vacuum cleaner comprises a lifting support 1, a pneumatic single column 2, a supporting guard plate 3, a holder 4, a pneumatic motor 5, a supporting plate 6, a baffle 7, a bearing 8, a fixing support 9, a driven gear 10, a driving gear 11, a connecting rod 12, a drill hole 13, a hole protecting pipe 14 and a negative pressure dust collector 15.
Detailed Description
In order to make the technical problems, technical solutions and advantageous effects to be solved by the present invention more clearly apparent, the present invention is further described in detail with reference to the embodiments and the accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention. The technical solution of the present invention is described in detail below with reference to the embodiments and the drawings, but the scope of protection is not limited thereto.
As shown in fig. 1 and 2, the coal mine gas extraction hole protecting and pipe pushing and pulling device comprises a clamping device, a driving device and a slag discharging device, wherein the clamping device comprises a clamp 4, a baffle 7 and a bearing 8, the baffle 7 is installed inside the bearing 8, the baffle 7 is matched with the inner diameter of the bearing 8, the baffle 7 can rotate relative to the bearing 8, and the bearing 8 is arranged on a plane supporting plate 6 through a fixing support 9; the supporting plate 6 is provided with a supporting guard 3 for supporting the clamper 4. The bottom of the supporting plate 6 is connected with a lifting bracket 1. A clamp 4 for clamping a hole protection pipe 14 is arranged at the center of the baffle 7, and the axis of the clamp 4 is communicated with a drill hole 13; as shown in fig. 3 and 4, the driving device includes pneumatic single columns 2, a connecting rod 12, a pneumatic motor 5, a driven gear 10 and a driving gear 11, a supporting plate 6 is provided with a slideway, the pneumatic motor 5 is arranged on the slideway so as to be capable of sliding back and forth along the slideway, and the fixed ends of the two pneumatic single columns 2 are respectively fixed with the outer circumference of a baffle 7; the shaft center of the driving gear 11 is connected with the pneumatic motor 5 through the connecting rod 12, the pneumatic motor 5 is used for driving the driving gear 11 to rotate forwards and backwards, the driven gear 10 is meshed with the driving gear 11, the holder 4 is fixed with the driven gear 10, the holder 4 is driven by the driven gear 10 to rotate, the holder 4 is connected with the telescopic rod ends of the two pneumatic single supporting columns 2 which are installed in parallel, the hole protecting pipes 14 are of a multi-section structure, each section of hole protecting pipe 14 is connected through threads, the tail end of the last section of hole protecting pipe 14 is connected with the slag discharging device, and the slag discharging device is a negative pressure dust collector 15.
One end of the supporting plate 6 is arranged close to the coal seam, the other end of the supporting plate is suspended, and a slide way is arranged on the supporting plate 6; the bottom end of the lifting bracket 1 is fixed at one end part of the supporting plate 6 tightly attached to the coal seam, and a chuck matched with the hole protecting pipe 14 is installed at the axis of the clamper 4.
Firstly, the pneumatic motor 5 drives the driving gear 11 to rotate, the driving gear 11 drives the driven gear 10, the driven gear 10 rotates to drive the holder 4 to rotate, the hole protecting pipe 14 matched with the holder 4 rotates to drive the bearing 8 to rotate, the baffle 7 matched with the inner ring of the bearing 8 rotates to drive the two pneumatic single columns 2 to rotate, forward rotation and reverse rotation can be continuously realized according to forward rotation rotating time set by the pneumatic motor 5, when the hole protecting pipe 14 needs to be pulled out, the two pneumatic single columns 2 oil cylinders extend to drive the pneumatic motor 5 on the right side and the lifting support 1 moves backwards to pull out the hole protecting pipe, rotation and pulling out are realized, when the hole protecting pipe 14 needs to be pushed into a drill hole, the two pneumatic single columns 2 oil cylinders contract, the pneumatic motor 5 and the lifting support 1 move forwards to push in the hole protecting pipe, and the rotation and the pushing in are realized.
The diameter of the sieve mesh hole protecting pipe is equal to that of the sieve mesh hole protecting pipe, and the diameter of the sieve mesh hole protecting pipe and the density of the sieve mesh are gradually reduced along with the increase of the depth of entering the drill hole.
The hole protecting pipes 14 are connected through threads, and anti-drop pins are arranged at the threads and penetrate through male and female joints of the two sections of hole protecting pipes.
The suction of the vacuum cleaner 15 increases with the depth of insertion of the grommet.
The inner diameter of the hole sealing pipe is 1.4-1.6 times of the outer diameter of the hole protecting pipe 14.
The specific working process is as follows:
the method comprises the following steps: and (3) drilling, namely drilling holes by using a 113mm drill bit, inserting the head end of a first 5m long phi 108 x 6mm sieve-hole-free hole protection pipe 14 into the drilled hole 13 after the holes are drilled, inserting the pipe body of the hole protection pipe 14 into the push-pull pipe device, connecting the pipe orifice at the tail end of the hole protection pipe 14 with a negative pressure dust collector 15, pushing the first section of sieve-hole-free hole protection pipe into the drilled hole 13 by using the sieve pipe hole protection device, and starting the negative pressure dust collector 15 to suck out the pulverized coal in the drilled hole 13.
Step two: connecting a second section of 5m long hole-protecting pipe 14 without sieve holes to the tail end of a first section of hole-protecting pipe 14, connecting two sections of hole-protecting pipes by using the threads between the hole-protecting pipes 14, connecting a male joint and a female joint at the thread positions, connecting a negative pressure dust collector 15 to the tail end pipe opening of the second section of hole-protecting pipe without sieve holes, pushing the second section of hole-protecting pipe 14 without sieve holes into the drill hole 13 by using the sieve pipe hole-protecting device, and starting the negative pressure dust collector 15 to suck out the coal dust in the drill hole 13 in the pushing process; as the length of the grommet 14 increases, the negative pressure of the negative pressure cleaner 15 gradually increases.
Step three: and repeating the second step, when the number of the hole protecting pipes 14 without the sieve holes entering the drill hole reaches 4, replacing the hole protecting pipes 14 without the sieve holes with the hole protecting pipes 14 with the sieve holes of the same specification, wherein the diameter of the sieve holes and the density of the sieve holes of the hole protecting pipes 14 with the sieve holes are gradually reduced along with the increase of the depth of the drill hole.
Step four: and pushing the hole protecting pipe 14 with the sieve holes into the drill hole 13 by using the sieve pipe hole protecting device until the hole protecting pipe 14 with the sieve holes is pushed still, and at the moment, the hole protecting pipe 14 with the sieve holes in the next section is not required to be connected with the tail end of the previous section, and the pipe pushing and pulling device is removed.
Step five: and sleeving the tail end of the last hole-protecting pipe 14 with a hole-sealing pipe of 151.2 × 6mm, inserting the hole-sealing pipe into the drill hole 13, sealing the hole with cement slurry for 20 meters, and connecting the hole-sealing pipe with a gas-pumping pipe.
Step six: when the gas extraction time of the drilled hole exceeds 90d, reversely installing the sieve tube hole protecting device at the tail end of the last section of hole protecting tube 14, connecting a negative pressure dust collector 15 with the tail end pipe orifice of the last section of 14 hole protecting tube with sieve holes, pulling out the hole protecting tube 14 section by section and cleaning coal scraps in the drilled hole; when the hole protecting pipe 14 is not pulled out, the pneumatic motor can be started to enable the supporting plate 6 and the horizontal surface of the lifting support 1 to rotate left and right for a certain angle, and after the hole protecting pipe 14 is pulled out, the hole protecting pipe is orderly for standby.
While the invention has been described in further detail with reference to specific preferred embodiments thereof, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (10)
1. The coal mine gas extraction hole-protecting pipe-pushing and pulling device is characterized by comprising a clamping device, a driving device and a slag discharging device, wherein the clamping device comprises a clamp holder (4), a baffle (7) and a bearing (8), the baffle (7) is installed inside the bearing (8), the baffle (7) is matched with the inner diameter of the bearing (8), the baffle (7) can rotate relative to the bearing (8), and the bearing (8) is arranged on a plane supporting plate (6) through a fixing support (9); a clamp holder (4) for clamping a hole protection pipe (14) is arranged at the center of the baffle (7), and the axis of the clamp holder (4) is communicated with the drill hole (13); the driving device comprises pneumatic single columns (2), connecting rods (12), a pneumatic motor (5), a driven gear (10) and a driving gear (11), a slide way is arranged on the supporting plate (6), the pneumatic motor (5) is arranged on the slide way and can slide back and forth along the slide way, and the fixed ends of the pneumatic single columns (2) are respectively fixed with the outer circumference of the baffle plate (7); the axle center of driving gear (11) passes through connecting rod (12) to be connected with pneumatic motor (5), and pneumatic motor (5) are used for driving corotation, the reversal of driving gear (11), and driven gear (10) and driving gear (11) gear engagement, holder (4) are fixed with driven gear (10), make holder (4) rotate under driven gear (10)'s drive, and holder (4) link to each other with the flexible rod end of pneumatic monomer pillar (2), the end connection of hole protecting pipe (14) row sediment device.
2. The coal mine gas extraction hole-protecting push-pull pipe device according to claim 1, characterized in that the slag discharging device is a negative pressure dust collector (15).
3. The coal mine gas extraction hole-protecting pipe-pulling device according to claim 1, characterized in that a lifting support (1) is connected to the bottom of the support plate (6).
4. The coal mine gas extraction hole-protecting push-pull pipe device according to claim 1, characterized in that a supporting device for supporting the holder (4) is arranged on the supporting plate (6).
5. The coal mine gas extraction hole-protecting pipe-pulling device according to claim 1, characterized in that the holder (4) is connected with the telescopic rod ends of two pneumatic single pillars (2) installed in parallel.
6. The coal mine gas extraction hole-protecting push-pull pipe device according to claim 1, characterized in that the hole-protecting pipe (14) is of a multi-section structure, and each section of hole-protecting pipe (14) is connected through threads.
7. The method for pushing and pulling the coal mine gas extraction hole protecting pipe according to claim 1, which is characterized by comprising the following steps:
the method comprises the following steps: after the construction of the drill hole (13) is finished, inserting the head end of a first section of hole protecting pipe into the drill hole (13), inserting the pipe body of the first section of hole protecting pipe into the push-pull pipe device, connecting the tail end pipe orifice of the first section of hole protecting pipe with a slag discharging device, pushing the first section of hole protecting pipe into the drill hole (1) while rotating by using the push-pull pipe device, and simultaneously starting the slag discharging device to suck out the coal dust in the drill hole (13);
step two: the head end of a second section of hole protecting pipe is connected to the tail end of a first section of hole protecting pipe, a slag discharging device is connected to the tail end pipe orifice of the second section of hole protecting pipe, the second section of hole protecting pipe is pushed into a drill hole (13) while rotating by using the push-pull pipe device, and the slag discharging device is started to suck out coal dust in the drill hole (13) in the pushing process; repeating the step to push the hole protecting pipes into the drill holes one by one (13); removing the push-pull pipe device;
step three: sleeving the tail end of the hole protection pipe with a hole sealing pipe, inserting hole sealing liquid for the hole sealing pipe into the drill hole (13) to seal the hole, and connecting a gas extraction pipe after hole sealing; connecting a slag discharging device with the tail end of the last section of hole protecting pipe;
step four: and when the gas extraction time of the drill hole exceeds the design period, reversely installing the pipe pushing and pulling device at the tail end of the last section of hole protecting pipe, connecting the slag discharging device with the pipe orifice at the tail end of the last section of hole protecting pipe, pulling out the hole protecting pipe while rotating, and cleaning coal scraps in the drill hole.
8. The method for pushing and pulling the coal mine gas extraction hole protecting pipe according to claim 7, wherein the hole protecting pipe comprises a sieve hole protecting pipe with equal diameter and a sieve hole protecting pipe without sieve holes, and the sieve hole diameter and the sieve hole density of the sieve hole protecting pipe with the sieve holes are gradually reduced along with the increase of the depth of the drilled hole.
9. The method for pushing and pulling the coal mine gas extraction hole protecting pipe according to claim 7, wherein the slag discharging device is a negative pressure dust collector (15), and the suction force of the negative pressure dust collector (15) is increased along with the increase of the insertion depth of the hole protecting pipe.
10. The method for pushing and pulling the coal mine gas extraction hole protecting pipe according to claim 7, wherein the inner diameter of the hole sealing pipe is 1.4-1.6 times of the outer diameter of the hole protecting pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911013167.0A CN110761714A (en) | 2019-10-23 | 2019-10-23 | Method and device for pushing and pulling pipe of coal mine gas extraction protective hole |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911013167.0A CN110761714A (en) | 2019-10-23 | 2019-10-23 | Method and device for pushing and pulling pipe of coal mine gas extraction protective hole |
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| Publication Number | Publication Date |
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| CN110761714A true CN110761714A (en) | 2020-02-07 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911013167.0A Pending CN110761714A (en) | 2019-10-23 | 2019-10-23 | Method and device for pushing and pulling pipe of coal mine gas extraction protective hole |
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| CN (1) | CN110761714A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111287712A (en) * | 2020-03-24 | 2020-06-16 | 中煤科工集团西安研究院有限公司 | Rotary pushing device for underground coal mine hole-protecting sieve tube and using method thereof |
| CN113815198A (en) * | 2021-09-14 | 2021-12-21 | 宁波跃飞模具有限公司 | Core pulling mechanism of injection mold and core pulling method thereof |
| CN113931575A (en) * | 2021-11-16 | 2022-01-14 | 西南石油大学 | Miniature automatic drilling device and method for coal seam gas extraction |
-
2019
- 2019-10-23 CN CN201911013167.0A patent/CN110761714A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111287712A (en) * | 2020-03-24 | 2020-06-16 | 中煤科工集团西安研究院有限公司 | Rotary pushing device for underground coal mine hole-protecting sieve tube and using method thereof |
| CN113815198A (en) * | 2021-09-14 | 2021-12-21 | 宁波跃飞模具有限公司 | Core pulling mechanism of injection mold and core pulling method thereof |
| CN113931575A (en) * | 2021-11-16 | 2022-01-14 | 西南石油大学 | Miniature automatic drilling device and method for coal seam gas extraction |
| CN113931575B (en) * | 2021-11-16 | 2023-03-14 | 西南石油大学 | Miniature automatic drilling device and method for coal seam gas extraction |
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