CN112228028A - Remote-control efficient hydraulic coal seam cutting permeability increasing device and construction method - Google Patents
Remote-control efficient hydraulic coal seam cutting permeability increasing device and construction method Download PDFInfo
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- CN112228028A CN112228028A CN202010959124.8A CN202010959124A CN112228028A CN 112228028 A CN112228028 A CN 112228028A CN 202010959124 A CN202010959124 A CN 202010959124A CN 112228028 A CN112228028 A CN 112228028A
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- 239000003245 coal Substances 0.000 title claims abstract description 48
- 238000010276 construction Methods 0.000 title claims abstract description 26
- 230000035699 permeability Effects 0.000 title claims abstract description 22
- 238000005553 drilling Methods 0.000 claims abstract description 65
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 63
- 239000002131 composite material Substances 0.000 claims abstract description 27
- 230000007246 mechanism Effects 0.000 claims abstract description 27
- 230000033001 locomotion Effects 0.000 claims abstract description 23
- 239000000523 sample Substances 0.000 claims abstract description 17
- 238000000605 extraction Methods 0.000 claims abstract description 10
- 238000000034 method Methods 0.000 claims abstract description 10
- 238000012544 monitoring process Methods 0.000 claims abstract description 7
- 238000001514 detection method Methods 0.000 claims description 7
- 238000007789 sealing Methods 0.000 claims description 5
- 238000005086 pumping Methods 0.000 claims description 3
- 230000008569 process Effects 0.000 abstract description 4
- 238000005065 mining Methods 0.000 abstract description 2
- 239000011435 rock Substances 0.000 abstract description 2
- 238000005516 engineering process Methods 0.000 description 4
- 239000012530 fluid Substances 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
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- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 239000002360 explosive Substances 0.000 description 1
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- 230000003068 static effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000008400 supply water Substances 0.000 description 1
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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
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/25—Methods for stimulating production
- E21B43/26—Methods for stimulating production by forming crevices or fractures
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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
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/006—Production of coal-bed methane
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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
- E21B44/00—Automatic control systems specially adapted for drilling operations, i.e. self-operating systems which function to carry out or modify a drilling operation without intervention of a human operator, e.g. computer-controlled drilling systems; Systems specially adapted for monitoring a plurality of drilling variables or conditions
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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
- E21B47/00—Survey of boreholes or wells
- E21B47/02—Determining slope or direction
- E21B47/024—Determining slope or direction of devices in the borehole
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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
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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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Abstract
The invention provides a remote-control high-efficiency hydraulic coal seam cutting permeability increasing device and a construction method, relates to the technical field of mining and rock drilling, and realizes the control of a drill bit motion trail and the remote control of coal seam cutting. The coal seam permeability-increasing device comprises a composite drill bit, a probe tube, a drill rod mechanism, a torrent outer tube, a drilling machine, an adapter and a high-pressure water supply pipeline, wherein the probe tube monitors the dynamic state of the drill bit and transmits monitoring information to a remote control system, and the composite drill bit adjusts the moving track of the drill bit through a motor, a rotor and a stator; the torrent outer tube is annularly arranged in the drill rod mechanism, the high-pressure water supply pipeline supplies water to the torrent outer tube through the adapter, and the drilling machine controls the drill rod mechanism and the composite drill bit to rotate. The construction method for cutting the permeability of the coal seam by using the device adjusts the motion track of the drill bit through remote control, realizes all-dimensional uniform cutting of the coal body in the drill withdrawal process, and installs the gas extraction pipe network after cutting, thereby improving the slotting efficiency and ensuring the construction safety.
Description
Technical Field
The invention relates to the technical field of mining and rock drilling, in particular to a remote-control high-efficiency hydraulic coal seam cutting permeability increasing device and a construction method.
Background
Coal is used as a main energy source, the yield and the consumption of the coal occupy the leading positions for a long time, the geological conditions are more and more complex along with the exploitation of coal resources, the exploitation depth of the coal is increased year by year, the frequent occurrence of mine disasters is caused, the loss caused by gas and fire disasters is particularly serious, and the life safety of underground workers is seriously threatened. The hydraulic cutting technology is a new cutting technology, and water is pressurized by a high-pressure pump and then sprayed out by a superfine nozzle to form high-pressure jet flow so as to complete the operations of cleaning, cutting, crushing and the like. As a cold cutting technology, the hydraulic cutting has the advantages of no dust, no spark, no thermal effect and the like, is safe to operate, has high cutting efficiency, and is suitable for being used in a closed and explosive environment of a coal mine. The hydraulic cutting technology is applied to permeability increase of the coal bed, so that the permeability of the coal bed can be increased, the gas content can be reduced, the coal bed can be wetted, the dust concentration of a mine can be reduced, and the probability of fire disaster can be reduced.
In the hydraulic drilling and slotting construction process adopted in a coal mine at the present stage, the hydraulic drilling and slotting construction is mainly completed by field operation of underground personnel, and the track and the cutting direction of a drill bit cannot be controlled in the construction process; especially when a plurality of drilling are under construction simultaneously, if can not guarantee the parallel relation between the drilling, then can not guarantee fine intercommunication between the drilling for gas distributes unevenly, leaves the accident potential, increases the construction risk. Therefore, the drilling direction needs to be adjusted by remotely controlling the drill bit, so that the construction effect of the hydraulic cutting of the track-determined drilling hole is ensured.
Disclosure of Invention
In order to realize the control of the movement track of a drill bit and the remote control of coal seam cutting, improve the slotting efficiency and ensure the construction safety, the invention provides a remote-control high-efficiency hydraulic coal seam cutting permeability increasing device and a construction method, and the specific technical scheme is as follows.
A remotely-controlled high-efficiency hydraulic coal seam cutting permeability-increasing device comprises a composite drill bit, a probe tube, a drill rod mechanism, an outer torrent tube, a drilling machine, an adapter, a remote control system and a high-pressure water supply pipeline; the composite drill bit comprises a drill bit motor, a stator, a rotor and a drill bit, wherein the drill bit motor is connected with the stator, the stator is connected with the rotor, and the drill bit is fixed at the end part of the rotor; the composite drill bit is fixedly connected with the detection pipe, the detection pipe is fixed at the end part of the drill rod mechanism, the drilling machine controls the drill rod mechanism to rotate, and the torrent outer pipe is arranged in the drill rod mechanism; the high-pressure water supply pipeline is connected with the adapter, and the adapter supplies water to the torrent outer pipe; and the remote control system transmits wireless signals with the probe tube and the composite drill bit respectively.
Preferably, the high-pressure water supply pipeline comprises a water station, a pressure pump and a high-pressure water pipe, wherein the pressure pump is connected with the water station, and the high-pressure water pipe is connected with a water outlet of the pressure pump.
Preferably, the remote control system sends a wireless control signal to the drill motor, and the probe tube transmits the monitored drill position information to the remote control system.
Preferably, the drill rod mechanism comprises a plurality of drill rods, an inner pipe is arranged in the center of each drill rod, and a torrent outer pipe is arranged in an annular space between the outer wall of each drill rod and the corresponding inner pipe.
Preferably, the high-efficiency hydraulic coal seam anti-reflection device is used for construction of multiple drill holes, and the multiple search pipes and the composite drill bit are controlled to work by 1 remote control system in cooperation with the multiple drill holes.
A remote-control efficient hydraulic coal seam cutting permeability increasing construction method utilizes the remote-control efficient hydraulic coal seam cutting permeability increasing device and comprises the following steps:
A. connecting a probe tube, a drill rod mechanism and a composite drill bit, starting the drilling machine, monitoring the motion track of the drill bit by the probe tube in real time, and controlling a drill bit motor to adjust the motion track of the drill bit by a remote control system;
B. after the drill bit continues to drill to a preset depth, stopping drilling, and starting a pressure pump to pump high-pressure water to the torrent outer pipe;
C. high-pressure water is delivered to a slot on the drill bit through the torrent outer pipe, and the high-pressure water is sprayed to form high-pressure torrent to cut coal;
D. pumping high-pressure water continuously, starting a drilling machine to retreat, monitoring the motion track of the drill bit in real time by a detection pipe, and controlling a drill bit motor to adjust the motion track of the drill bit by a remote control system;
E. after the length of one drill rod is withdrawn, the drill machine and the pressure pump are closed, and the drill rod is dismounted;
F. repeating the steps D-E until all the drill rods exit from the drill hole;
G. and installing an extraction pipe in the drill hole, sealing the drill hole, and connecting the extraction pipe and the underground extraction pipe network after plugging is finished.
It is further preferred that a plurality of boreholes are constructed simultaneously and that the remote control system controls the movement trajectory of the drill bit in the plurality of boreholes.
The remotely-controlled high-efficiency hydraulic coal seam cutting permeability increasing device and the construction method provided by the invention have the beneficial effects that:
(1) this coal seam anti-reflection device composite bit and detecting tube are mutually supported to can judge in real time and adjust the movement track of drill bit, the skew of composite bit adjustment drilling direction, thereby guarantee the harmony between a plurality of drilling, keep parallel arrangement between the drilling, thereby can make the coal seam crack between the drilling realize better lining up, and guarantee the evenly distributed of gas.
(2) The high pressure water supply pipeline supplies water to the torrent outer tube through crossover sub, and remote control system can realize the control to drill bit in a plurality of drilling simultaneously to guarantee the harmony that a plurality of drilling were under construction simultaneously.
(3) The method for hydraulic coal seam cutting permeability-increasing construction utilizes the structural characteristics of a coal seam permeability-increasing device, and controls the axial position of a drill hole by adjusting the motion track of a drill bit in real time; the hydraulic cutting is accomplished at the in-process that withdraws from the drilling rod in torrent outer tube cooperation drill bit position, because each drilling is arranged in coordination to and remote control system controls through the mode of "centralized control, work alone", has improved the efficiency of drilling and hydraulic cutting seam, and remote control can also promote the security performance.
Drawings
FIG. 1 is a schematic structural diagram of a remotely-controlled high-efficiency hydraulic coal seam cutting permeability increasing device;
FIG. 2 is a schematic view of a composite drill bit mounting configuration;
FIG. 3 is a schematic view of a multi-borehole cooperative arrangement;
in the figure: the method comprises the following steps of 1-a composite drill bit, 2-a probe tube, 3-a drill rod mechanism, 4-a torrent outer tube, 5-a drilling machine, 6-a conversion joint, 7-a remote control system, 8-a water station, 9-a pressure pump, 10-a high-pressure water tube, 11-a drill bit motor, 12-a stator, 13-a rotor, 14-a drill bit and 15-an inner tube.
Detailed Description
Specific embodiments of a remotely-controlled high-efficiency hydraulic coal seam cutting permeability increasing device and a construction method provided by the invention are described with reference to fig. 1 to 3.
The utility model provides a its structure of high-efficient water conservancy cutting coal seam anti-reflection device of remote control includes composite drill bit 1, detecting tube 2, drilling rod mechanism 3, torrent outer tube 4, rig 5, crossover sub 6, remote control system 7 and high pressure water supply pipeline, can set up a plurality of drilling rod mechanisms between rig 5 and the composite drill bit 1, sets up the detecting tube between drilling rod mechanism and the composite drill bit, and high pressure water supply pipeline passes through crossover sub and links to each other with the rig. The composite drill bit 1 comprises a drill bit motor 11, a stator 12, a rotor 13 and a drill bit 14, wherein the drill bit motor 11 is connected with the stator 12, the stator 12 is connected with the rotor 13, and the drill bit 14 is fixed at the end part of the rotor. The motor of the drill bit 14 can be a hydraulic hole bottom motor or a screw motor, and the screw motor is a positive displacement hydraulic motor and is the inverse application of the principle of a 'Mono pump', namely a single-screw pump. The stator and the rotor are provided with spiral teeth and grooves, the inner surface of the stator is a layer of rubber with the spiral teeth and the groove cavities, the surface of the steel rotor contained in the stator is also provided with the spiral teeth and the groove cavities, the steel rotor is usually in static fit with the stator, and a plurality of closed cavities divided by a plurality of continuous sealing lines are formed; when a fluid under pressure is supplied to the stator and rotor, a part of the seal chambers is filled with a high-pressure fluid and periodically communicates with the high-pressure chamber or the low-pressure chamber, so that under the pressure of the working fluid, an unbalanced hydraulic force is generated in the cross section of each working cavity, thereby causing a total rotational moment M along the pitch length of the rotor, and controlling the drill bit to be offset by an offset angle of typically 5-10 DEG, and correcting the offset of the drill bit movement trajectory in long-distance drilling by the offset.
The composite drill bit 1 is fixedly connected with the detecting tube 2, the moving track of the drill bit in the composite drill bit can be determined through the detecting tube 2, the detecting tube 2 is fixed at the end part of the drill rod mechanism, the drill rod mechanism is controlled by the drilling machine 5 to rotate, long-distance drilling can be achieved by connecting the drill rod mechanisms 3, the torrent outer tube 4 is arranged in the drill rod mechanism, and high-pressure water is supplied to the inside of the drilling hole through the torrent outer tube 4. The high-pressure water supply pipeline is connected with the adapter 6, the adapter 6 inputs high-pressure water from the high-pressure water supply pipeline into the torrent outer pipe of the drill rod mechanism, the adapter 6 supplies water to the torrent outer pipe, and the torrent outer pipe 4 and the drill rod mechanism 3 can be integrally arranged, so that the stability of high-pressure water supply is ensured. Remote control system 7 respectively with detecting tube 2 and 1 transmission radio signal of compound drill bit, can realize "centralized control, the autonomous working" of equipment in a plurality of drilling through remote control system to in coordination with the construction of each drilling, guarantee the harmony between a plurality of drilling, keep parallel arrangement between the drilling, thereby can make the coal seam crack between the drilling realize better lining up, and guarantee the evenly distributed of gas.
The high-pressure water supply pipeline comprises a water station 8, a pressure pump 8 and a high-pressure water pipe 10, the pressure pump 8 is connected with the water station 8, the water station stores a large amount of clear water for the pressure pump to extract, the high-pressure water pipe 10 is connected with a water outlet of the pressure pump 8, and the pressure pump 8 conveys water to the drilling machine through the high-pressure water pipe. The remote control system 7 sends a wireless control signal to the drill motor, so that the drill is controlled to move along a set direction and a preset track, adjacent drilling axes caused by drill position deviation in long drilling are avoided, the probe tube 2 transmits monitored drill position information to the remote control system, the remote control system 7 calculates and determines the moving track of the drill, the moving track of the drill is compared with the moving tracks of the drill in other drilling holes, and real-time control over the drill in multiple drilling holes is achieved. The drill rod mechanism 3 comprises a plurality of drill rods, an inner pipe 15 is arranged at the center of each drill rod, and a torrent outer pipe is arranged in an annular space between the outer wall of each drill rod and the inner pipe 15; each drill rod is of a double-layer structure, and the torrent outer pipe 4 is annular, so that high-pressure sealing is guaranteed.
The high-efficiency hydraulic coal seam cutting permeability-increasing device is used for simultaneous construction of a plurality of drill holes, wherein the plurality of drill holes are cooperatively constructed by controlling a plurality of detecting tubes and composite drill bits through 1 remote control system, and the remote control system integrally adjusts the movement of all the drill bits in real time according to the movement track of each drill bit.
A remote-control efficient hydraulic coal seam cutting permeability increasing construction method utilizes the remote-control efficient hydraulic coal seam cutting permeability increasing device and comprises the following steps:
A. connecting each component of a probe tube, a drill rod mechanism, a composite drill bit and the like, starting the drilling machine, monitoring the motion track of the drill bit by the probe tube in real time, and controlling a drill bit motor to adjust the motion track of the drill bit by a remote control system; and enabling the drill bit to drill according to the preset designed drilling path. When a plurality of drilling holes are constructed simultaneously, the drilling progress of the drill bits in each drilling hole needs to be kept basically consistent, and each drill bit drills along respective moving tracks, so that the cooperative drilling is realized, the parallel structure among the drilling holes is ensured, and the remote control system realizes the unified control of the moving tracks of the drill bits in the plurality of drilling holes.
B. And after the drill bit continues to drill to a preset depth, stopping drilling, and starting the pressure pump to pump high-pressure water to the torrent outer pipe. The depth of the drilling hole is about 90-100m, and a plurality of drilling holes are arranged at the same time and are drilled at the same time; when the interval of a plurality of drilling is less, can use same high pressure feed water pipe way to each drilling water supply, also can set up high pressure feed water pipe way respectively as required and supply water.
C. High-pressure water is delivered to a slot on the drill bit through the torrent outer pipe, and the high-pressure water is sprayed to form high-pressure torrent to cut coal bodies. High-pressure water is sprayed through a slotted opening on the drill to form high-pressure torrent, so that the coal seam is cut and permeability is increased. Because the pressure of high-pressure water is constant, the lengths of the cutting seams of all the drill holes are generally not greatly different, so that the drill holes are kept parallel, the cutting seams can be communicated as much as possible, all the drill holes are communicated, and the gas is uniformly distributed
D. And continuously pumping high-pressure water, starting the drilling machine to retreat, monitoring the motion track of the drill bit by the detection pipe in real time, and controlling the drill bit motor to adjust the motion track of the drill bit by the remote control system. High-pressure water is used for drilling and uniformly cutting in the drill withdrawal process, and the plurality of drill holes are communicated with one another, so that the drilling and hydraulic cutting efficiency is improved.
E. And (5) closing the drilling machine and the pressure pump after the drill rod is withdrawn, and detaching the drill rod.
F. And D-E is repeated until all the drill rods exit the drill hole.
G. And installing an extraction pipe in the drill hole, sealing the drill hole, and connecting the extraction pipe and the underground extraction pipe network after plugging is finished.
In the method, if a plurality of drill holes are constructed simultaneously, the remote control system controls the motion tracks of the drill bits in the plurality of drill holes.
It is to be understood that the above description is not intended to limit the present invention, and the present invention is not limited to the above examples, and those skilled in the art may make modifications, alterations, additions or substitutions within the spirit and scope of the present invention.
Claims (7)
1. A remote-control high-efficiency hydraulic coal seam cutting permeability-increasing device is characterized by comprising a composite drill bit, a probe tube, a drill rod mechanism, a torrent outer tube, a drilling machine, an adapter, a remote control system and a high-pressure water supply pipeline; the composite drill bit comprises a drill bit motor, a stator, a rotor and a drill bit, wherein the drill bit motor is connected with the stator, the stator is connected with the rotor, and the drill bit is fixed at the end part of the rotor; the composite drill bit is fixedly connected with the detection pipe, the detection pipe is fixed at the end part of the drill rod mechanism, the drilling machine controls the drill rod mechanism to rotate, and the torrent outer pipe is arranged in the drill rod mechanism; the high-pressure water supply pipeline is connected with the adapter, and the adapter supplies water to the torrent outer pipe; and the remote control system transmits wireless signals with the probe tube and the composite drill bit respectively.
2. The remotely-controlled high-efficiency hydraulic coal seam cutting permeability increasing device for the coal seam as claimed in claim 1, wherein the high-pressure water supply pipeline comprises a water station, a pressure pump and a high-pressure water pipe, the pressure pump is connected with the water station, and the high-pressure water pipe is connected with a water outlet of the pressure pump.
3. The device of claim 1, wherein the remote control system sends a wireless control signal to the drill motor, and the probe tube transmits monitored drill bit position information to the remote control system.
4. The remotely-operated high-efficiency hydraulic cutting coal seam permeability increasing device is characterized in that the drill rod mechanism comprises a plurality of drill rods, an inner pipe is arranged in the center of each drill rod, and an outer torrent pipe is arranged in an annular space between the outer wall of each drill rod and the inner pipe.
5. The remotely-operated high-efficiency hydraulic cutting coal seam permeability increasing device according to any one of claims 1 to 4, wherein the high-efficiency hydraulic cutting coal seam permeability increasing device is used for construction of a plurality of drill holes, the plurality of drill holes are constructed in a coordinated mode, and the work of a plurality of probe tubes and a composite drill bit is controlled by 1 remote control system.
6. A remote-control high-efficiency hydraulic cutting coal seam permeability increasing construction method is characterized in that the remote-control high-efficiency hydraulic cutting coal seam permeability increasing device of any one of claims 1 to 4 is utilized, and the method comprises the following steps:
A. connecting a probe tube, a drill rod mechanism and a composite drill bit, starting the drilling machine, monitoring the motion track of the drill bit by the probe tube in real time, and controlling a drill bit motor to adjust the motion track of the drill bit by a remote control system;
B. after the drill bit continues to drill to a preset depth, stopping drilling, and starting a pressure pump to pump high-pressure water to the torrent outer pipe;
C. high-pressure water is delivered to a slot on the drill bit through the torrent outer pipe, and the high-pressure water is sprayed to form high-pressure torrent to cut coal;
D. pumping high-pressure water continuously, starting a drilling machine to retreat, monitoring the motion track of the drill bit in real time by a detection pipe, and controlling a drill bit motor to adjust the motion track of the drill bit by a remote control system;
E. after the length of one drill rod is withdrawn, the drill machine and the pressure pump are closed, and the drill rod is dismounted;
F. repeating the steps D-E until all the drill rods exit from the drill hole;
G. and installing an extraction pipe in the drill hole, sealing the drill hole, and connecting the extraction pipe and the underground extraction pipe network after plugging is finished.
7. The method for permeability-increasing construction of the remote-controlled high-efficiency hydraulic cutting coal seam according to claim 6, wherein a plurality of drill holes are constructed simultaneously, and the remote control system controls the motion tracks of drill bits in the plurality of drill holes simultaneously.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010959124.8A CN112228028A (en) | 2020-09-14 | 2020-09-14 | Remote-control efficient hydraulic coal seam cutting permeability increasing device and construction method |
| PCT/CN2020/127433 WO2022052288A1 (en) | 2020-09-14 | 2020-11-09 | Remotely controlled high-efficiency hydraulic cutting device for permeability increase of coal seam, and construction method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010959124.8A CN112228028A (en) | 2020-09-14 | 2020-09-14 | Remote-control efficient hydraulic coal seam cutting permeability increasing device and construction method |
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| CN112228028A true CN112228028A (en) | 2021-01-15 |
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| CN113187393A (en) * | 2021-03-16 | 2021-07-30 | 中煤科工集团重庆研究院有限公司 | Hydraulic cutting horizontal guiding device based on gravity guiding mechanism and using method |
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| CN114607336B (en) * | 2022-03-08 | 2023-10-27 | 煤炭科学技术研究院有限公司 | Colliery underground high-pressure gas-liquid two-phase jet impact pressure relief and reflection increasing method |
| CN115467647B (en) * | 2022-10-19 | 2023-07-18 | 中煤科工集团重庆研究院有限公司 | Water jet cutting method of parallel layer directional plane slot |
| CN116044361B (en) * | 2022-12-26 | 2024-09-10 | 重庆大学 | Coal seam horizontal long-drilling anti-reflection system based on hole bottom self-excitation |
| CN117780426B (en) * | 2024-01-17 | 2024-09-24 | 河南理工大学 | Device and method for coal seam gas extraction and permeability improvement |
| CN118462168A (en) * | 2024-05-20 | 2024-08-09 | 中煤科工集团沈阳研究院有限公司 | Long-distance directional ultrahigh-pressure cutting roof caving equipment and construction process |
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- 2020-09-14 CN CN202010959124.8A patent/CN112228028A/en active Pending
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| CN113187393B (en) * | 2021-03-16 | 2022-05-17 | 中煤科工集团重庆研究院有限公司 | Hydraulic cutting horizontal guiding device based on gravity guiding mechanism and using method |
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| WO2022052288A1 (en) | 2022-03-17 |
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