CN111927455A - Drilling type full-air-pressure ventilation strip type coal mining device and coal mining method - Google Patents
Drilling type full-air-pressure ventilation strip type coal mining device and coal mining method Download PDFInfo
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- CN111927455A CN111927455A CN202010944061.9A CN202010944061A CN111927455A CN 111927455 A CN111927455 A CN 111927455A CN 202010944061 A CN202010944061 A CN 202010944061A CN 111927455 A CN111927455 A CN 111927455A
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- 239000003245 coal Substances 0.000 title claims abstract description 177
- 238000005065 mining Methods 0.000 title claims abstract description 161
- 238000009423 ventilation Methods 0.000 title claims abstract description 103
- 238000005553 drilling Methods 0.000 title claims abstract description 38
- 238000000034 method Methods 0.000 title claims abstract description 18
- 239000011229 interlayer Substances 0.000 claims abstract description 4
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 239000007789 gas Substances 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21C—MINING OR QUARRYING
- E21C41/00—Methods of underground or surface mining; Layouts therefor
- E21C41/16—Methods of underground mining; Layouts therefor
- E21C41/18—Methods of underground mining; Layouts therefor for brown or hard coal
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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
- E21F1/00—Ventilation of mines or tunnels; Distribution of ventilating currents
- E21F1/04—Air ducts
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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
- E21F1/00—Ventilation of mines or tunnels; Distribution of ventilating currents
- E21F1/10—Air doors
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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
- E21F17/00—Methods or devices for use in mines or tunnels, not covered elsewhere
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Abstract
The invention discloses a drilling type full-wind-pressure ventilation strip-type coal mining device and a coal mining method, wherein the drilling type full-wind-pressure ventilation strip-type coal mining device comprises a coal mining area and a roadway, the coal mining area is provided with a plurality of strips of coal seams and a plurality of coal pillars of the coal seams distributed with strip interlayers of the coal seams, the lower part of the coal mining area is provided with an air inlet roadway of the roadway, and the upper part of the coal mining area is provided with an air return roadway; drilling a ventilation hole which is communicated with an air inlet tunnel and an air return tunnel up and down in a strip of the coal bed through a drilling machine, arranging an upper air door and an adjusting air window in the air return tunnel at the upper part of the coal pillar close to one side of the strip with the ventilation hole, and arranging a lower air door and an adjusting air window in the air inlet tunnel at the lower part of the coal pillar for controlling air to circulate up and down from the ventilation hole; the invention mainly arranges the working face according to the strip branch roadway in the whole coal mining section, and the effective full wind pressure ventilation is realized by the ventilation system of the whole mine without the ventilation of a local ventilator in the mining process after the working face is formed; full wind pressure ventilation is realized in strip branch roadway coal mining, and safe production is ensured.
Description
Technical Field
The invention relates to the technical field of coal mining, in particular to a drilling type full-air-pressure ventilation strip type coal mining device and a coal mining method.
Background
In actual mining, due to the fact that a local ventilator is required to be used for ventilation all the time, when the double power supplies and the double fans of ventilation cannot be started due to the fact, ventilation cannot be achieved in mining, harmful gases such as gas cannot be removed, oxygen cannot be breathed by field workers, and therefore serious hidden dangers and accidents are caused. When the strip branch roadway, namely the single-ended roadway, is used for excavating operation, a local ventilator must be used, so that the strip branch roadway coal mining method is not a full-wind-pressure ventilation mining mode, is actually used for excavating and replacing mining, and is very unfavorable for coal mine safety production. Therefore, a drilling type full-wind-pressure ventilation strip coal mining device and a coal mining method are urgently needed to be designed so as to solve the problems of hidden dangers and accidents caused by unsmooth ventilation in the coal mining process.
Disclosure of Invention
Aiming at the problems in the prior art, the invention aims to provide a drilling type full-wind-pressure ventilation strip coal mining device and a coal mining method.
The technical scheme adopted by the invention for solving the technical problems is as follows: a drilling type full-wind-pressure ventilation strip coal mining device comprises a coal mining area and a roadway, wherein the coal mining area is provided with strips of a plurality of coal seams and coal pillars of the plurality of coal seams distributed with strip interlayers of the coal seams, the strips of the coal seams are provided with and not limited to a strip I, a strip II, a strip III, a strip IV and a strip V, the coal pillars of the coal seams are clamped among the strip I, the strip II, the strip III, the strip IV and the strip V and are not limited to the coal pillar I, the coal pillar II, the coal pillar III and the coal pillar IV, the lower part of the coal mining area is provided with an air inlet roadway of the roadway, the upper part of the coal mining area is provided with a return airway, one end of the return airway is communicated with an air connection roadway, the outer part of one side of the coal mining area is provided with a coal transporting direction upwards, and the coal transporting roadway of the mining area upwards is communicated with the air inlet;
the strip of the coal bed is internally provided with a ventilation hole which is vertically communicated with the air inlet tunnel and the air return tunnel through a drilling machine, the air return tunnel at the upper part of the coal pillar close to one side of the strip with the ventilation hole is internally provided with an upper air door and an adjusting air window, and the air inlet tunnel at the lower part of the coal pillar is internally provided with a lower air door and an adjusting air window which are used for controlling the air to vertically circulate from the ventilation hole.
Specifically, the coal mining area mines in an upward mining mode according to the inclination angle of the coal bed, the inclination angle of the coal bed is an upward mining inclination angle, and the upward mining inclination angle is 4-20 degrees.
Specifically, the mining direction of the elevation mining mode is from an air inlet roadway to an air return roadway.
Specifically, the mining length of the coal seam strip from bottom to top is 50-80m, and the mining width of the coal seam strip is 4-15 m.
Specifically, the mining included angle between the strip of the coal seam and the air inlet roadway is 110-140 degrees.
Specifically, coal transportation equipment is arranged in the coal conveying roadway and the air inlet roadway in the mining area, and is used for conveying coal out according to the coal conveying direction.
Specifically, the diameter of the ventilation hole is 0.4-1 m.
A coal mining method of a drilling type full wind pressure ventilation strip type coal mining device comprises the following steps:
1) the coal mining area completes mining of a first strip according to the inclination angle of the coal bed in an overhead mining mode, a lower air door and an adjusting air window are installed at the lower end of a first coal pillar, and an upper air door and an adjusting air window are installed at the upper end of the first coal pillar; normal ventilation is from an air inlet lane to a lower air door and an adjusting air window, passes through a gob area with a strip I to an upper air door and an adjusting air window, and passes through a return air lane to a return air lane connection lane to form full air pressure ventilation;
2) constructing a mining second strip, installing a drilling machine at the position of the air inlet roadway, which is right opposite to the mining second strip, and starting to open the ventilation hole, wherein the drilling machine opens the ventilation hole along the upward direction of the working surface of the mining second strip until the whole mining second strip is penetrated;
3) when the coal seam is high in hardness and not easy to collapse, the short pipe is installed in the drill rod withdrawing direction along with the drill rod withdrawing when the drill rod is ready to be withdrawn after the ventilation holes of the second strip are communicated, and when the drill rod is completely withdrawn, ventilation pipelines are completely installed and laid in the whole drilling hole to form the ventilation holes;
4) when the coal seam is low in hardness and easy to collapse, the strip II is sleeved outside the drill rod from bottom to top through the short pipe while drilling the ventilation hole through the drilling machine, the strip II extends into the drill hole along the direction of the drill rod, the drill rod is connected with the short pipe with the same length, the short pipe with the same length is installed at the same time after the drill rod is drilled, and the ventilation pipeline is completely installed and laid in the whole drill hole to form the ventilation hole;
5) meanwhile, the lower air door and the air adjusting window, the upper air door and the air adjusting window are closed, and fresh air flows along with the air inlet lane, through the ventilation pipeline in the mining strip II, through the air return lane and then into the air return lane connection lane, so that full-air-pressure ventilation is formed;
6) adopting mining equipment to implement coal mining operation at the position of the air inlet tunnel corresponding to the second mining strip, mining along with the advance of mining, mining all coal around the ventilation pipeline, detaching and taking the ventilation pipeline at the pipeline connection position each time, then continuing to mine coal, repeating the steps until the second mining strip is finished, and carrying out full wind pressure ventilation in the second mining strip;
7) after the second stripe is mined, a lower air door, an adjusting air window, an upper air door and an adjusting air window which are the same as the upper end and the lower end of the first coal pillar are arranged at the upper end and the lower end of the second coal pillar, and the whole working face keeps normal full air pressure ventilation;
8) and then, installing the drilling machine at the position of the air inlet roadway, which is right opposite to the position for mining the third strip, starting to open the air vent, repeating the steps from 2 to 7, and completing the mining of the third strip, and repeating the steps to complete the mining of the fourth strip, the fifth strip and the strip of the whole working face.
The invention has the following beneficial effects:
the invention designs a drilling type full wind pressure ventilation strip coal mining device and a coal mining method, which mainly arrange a working face according to strip branch roadways in the whole coal mining section, and do not need a local ventilator to ventilate in the mining process after the working face is formed, but realize effective full wind pressure ventilation by a ventilation system of the whole mine; the problem that when local ventilation is used, when the double power supplies and the double fans cannot be started due to reasons, ventilation cannot be achieved is solved; the full wind pressure ventilation is realized in the strip-type branch roadway coal mining, the risk and potential safety hazard caused by the implementation of mining operation by using a local ventilator for ventilation are avoided, the realized safe ventilation is realized, and the safety production is ensured.
Drawings
Fig. 1 is a schematic structural diagram of a drilling type full wind pressure ventilation strip coal mining device.
Fig. 2 is a schematic sectional view taken along the line a-a in fig. 1.
Fig. 3 is a schematic sectional view taken along the direction B-B in fig. 1.
In the figure: 1-a coal conveying roadway on the upper mountain of a mining area; 2-connecting the tunnel with the return airway; 3-air inlet lane; 4-return airway; 5-direction of mining; 6-elevation dip angle; 7-mining included angle; 8-coal conveying direction; 9-lower air door and adjusting air window; 10-upper air door and adjusting air window; 11-a ventilation hole; 12-lane one; 13-lane two; 14-lane three; 15-strip four; 16-lane five; 17-coal pillar one; 18-coal pillar two; 19-coal column three; 20-coal pillar four.
Detailed Description
The technical solutions in the embodiments of the present invention will be described in further detail in the following clearly and completely with reference to the accompanying drawings in the embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in fig. 1-3, a drilling type full wind pressure ventilation strip coal mining device comprises a coal mining area and a roadway, wherein the coal mining area is provided with a plurality of strips of coal seams and a plurality of coal pillars of the coal seams distributed with strip interlayers of the coal seams, the strips of the coal seams are provided with and not limited to a strip one 12, a strip two 13, a strip three 14, a strip four 15 and a strip five 16, and are arranged in sequence by analogy, the coal pillars of the coal seams are clamped among the strip one 12, the strip two 13, the strip three 14, the strip four 15 and the strip five 16 and are not limited to a coal pillar one 17, a coal pillar two 18, a coal pillar three 19 and a coal pillar four 20, and are arranged in sequence by analogy, the lower part of the coal mining area is provided with an air inlet roadway 3, the upper part of the coal mining area is provided with an air return roadway 4, one end of the air return roadway 4 is communicated with an air return roadway connection 2, and the outer part of one side.
A ventilation hole 11 which is communicated with the air inlet lane 3 and the air return lane 4 up and down is drilled in the strip of the coal bed through a drilling machine, an upper air door and an adjusting air window 10 are arranged in the air return lane 4 at the upper part of the coal pillar close to one side of the strip with the ventilation hole 11, and a lower air door and an adjusting air window 9 are arranged in the air inlet lane 3 at the lower part of the coal pillar and used for controlling the air to circulate up and down from the ventilation hole 11.
The coal conveying roadway 1 on the upper mountain of the mining area is communicated with the air inlet roadway 3 and is distributed with the air return roadway 4 in a staggered mode, and air enters the air inlet roadway 3 from the coal conveying roadway 1 on the upper mountain of the mining area, then enters the air return roadway 4 through the lower air door and the adjusting air window 9, the mined strips, the upper air door and the adjusting air window 10 (or through the ventilation holes 11), and finally enters the air return roadway connecting roadway 2 to form full-air-pressure ventilation.
The coal mining area mines according to the inclination angle of the coal bed in an upward mining mode, the inclination angle of the coal bed is an upward mining inclination angle 6, and the upward mining inclination angle 6 is 4-20 degrees, so that when a drilling machine drills holes, coal powder and particles can automatically come out along with the rotation of the drill rod in time under the state of the inclination angle. The air inlet lane 3 is arranged at the lower part, and the air return lane 4 is arranged at the upper part; when the strip is mined, construction is carried out from bottom to top, namely the mining direction from the air inlet lane 3 to the air return lane 4 is arranged to be a face-up strip mining working face, namely mining is carried out in the direction indicated by the mining direction 5; the length of the strip working face is determined according to 50-80m, and the width is determined according to the conditions of the top plate and the bottom plate and is determined according to 4-15 m. The arrangement angle of the mining included angle 7 between the mining strip and the air inlet roadway 3 is between 110 and 140 degrees, and the main purpose is to ensure that the mining equipment has enough turning radius to smoothly enter the mining strip working face. Coal transportation equipment is arranged in the coal conveying roadway and the air inlet roadway on the mountainside of the mining area and is used for conveying coal out according to the coal conveying direction. The diameter of the ventilation hole is 0.4-1m, and the length of the drill rod is 3-6m as long as the length of the ventilation pipeline.
A coal mining method of a drilling type full wind pressure ventilation strip type coal mining device comprises the following steps:
1) the coal mining area completes mining of a first strip 12 according to the inclination angle of the coal bed in an overhead mining mode, a lower air door and an adjusting air window 9 are installed at the lower end of a first coal pillar 17, and an upper air door and an adjusting air window 10 are installed at the upper end of the first coal pillar 17; normal ventilation is ensured to be carried out from the air inlet lane 3 to the lower air door and the air adjusting window 9, passes through the goaf with the strip I12 to the upper air door and the air adjusting window 10, and passes through the return air lane 4 to the return air lane connection lane 2, so that full air pressure ventilation is formed;
2) constructing a second mining strip 13, installing a drilling machine at the position of the air inlet roadway 3, which is opposite to the second mining strip 12, and starting to open the air hole 11, wherein the drilling machine opens the air hole 11 along the upward direction of the working surface of the second mining strip 13 until the whole second mining strip 13 is penetrated;
3) when the coal seam has high hardness and is not easy to collapse, when the ventilation holes 11 of the second strip 13 are communicated and the drill rod is ready to be withdrawn, a plurality of short pipes with the diameter of 0.4-1m and the length of 3-6m are prepared at the position of the return airway 4 corresponding to the second strip 13; along with the withdrawal of the drill rod, the short pipes are installed in the withdrawal direction of the drill rod, the diameters of the short pipes are connected by threads, and when the drill rod is completely withdrawn, ventilation pipelines are completely installed and laid in the whole drill hole to form a ventilation hole 11;
4) when the coal seam is low in hardness and easy to collapse, the strip II 13 is sleeved outside the drill rod from bottom to top through the short pipe while drilling the ventilation hole 11 through the drilling machine, the short pipe extends into the drill hole along the direction of the drill rod, the drill rod is connected with the short pipe with the same length, the short pipe with the same length is installed at the same time after the drill rod is drilled, and the ventilation pipeline is completely installed in the whole drill hole to form the ventilation hole 11;
5) meanwhile, the lower air door and the adjusting air window 9, the upper air door and the adjusting air window 10 are closed, fresh air flows along with the air inlet lane 3, through the ventilation pipeline in the mining strip II 13, through the air return lane 4 and then into the air return lane connecting lane 2, so that full air pressure ventilation is formed, and at the moment, in order to reduce the cross wind of the mined-out area of the strip I12 and the pressure of the mined-out top plate, the mined-out area of the strip I12 can be filled with paste or high-water materials and the like;
6) adopting mining equipment to implement coal mining operation at the position of the air inlet lane 3 corresponding to the second mining strip 13, mining along with the advance of mining, mining all coal around the ventilation pipeline, detaching and taking the ventilation pipeline at the joint of each mining pipeline, then continuing mining coal, repeating the steps until the whole second mining strip 13 is mined, and carrying out full-air-pressure ventilation in the mining of the whole second mining strip 13;
7) after the strips 13 are mined, a lower air door, an adjusting air window 9, an upper air door and an adjusting air window 10 which are the same as the upper end and the lower end of the coal pillar I17 are arranged at the upper end and the lower end of the coal pillar II 18, and normal full air pressure ventilation is kept on the whole working face;
8) and then, installing the drilling machine on the position, facing the third strip 14, of the air inlet roadway 3, starting to open the ventilation hole 11, repeating the steps from 2 to 7, finishing the third strip 14, and repeating the steps to finish the strip mining of the fourth strip 15, the fifth strip 16 and the whole working face.
A drilling type full wind pressure ventilation strip coal mining device and a coal mining method mainly arrange a working face according to strip branch roadways in the whole coal mining section, and effective full wind pressure ventilation is realized by a ventilation system of the whole mine without a local ventilator for ventilation in the mining process after the working face is formed; when local ventilation is not used, the situation that ventilation cannot be achieved when the double power supplies and the double fans cannot be started due to reasons is avoided.
The present invention is not limited to the above embodiments, and any structural changes made under the teaching of the present invention shall fall within the scope of the present invention, which is similar or similar to the technical solutions of the present invention.
The techniques, shapes, and configurations not described in detail in the present invention are all known techniques.
Claims (8)
1. A drilling type full-wind-pressure ventilation strip coal mining device is characterized by comprising a coal mining area and a roadway, wherein the coal mining area is provided with strips of a plurality of coal seams and coal pillars of the plurality of coal seams distributed with strip interlayers of the coal seams, the strips of the coal seams are provided with and not limited to a strip I, a strip II, a strip III, a strip IV and a strip V, the coal pillars of the coal seams are clamped among the strip I, the strip II, the strip III, the strip IV and the strip V and are not limited to a coal pillar I, a coal pillar II, a coal pillar III and a coal pillar IV, the lower part of the coal mining area is provided with an air inlet roadway of the roadway, the upper part of the coal mining area is provided with an air return roadway, one end of the air return roadway is communicated with an air transportation roadway, the outer part of one side of the coal mining area is provided with a coal transportation roadway on the upper mountain of the coal mining area with the upward coal transportation direction, and;
the strip of the coal bed is internally provided with a ventilation hole which is vertically communicated with the air inlet tunnel and the air return tunnel through a drilling machine, the air return tunnel at the upper part of the coal pillar close to one side of the strip with the ventilation hole is internally provided with an upper air door and an adjusting air window, and the air inlet tunnel at the lower part of the coal pillar is internally provided with a lower air door and an adjusting air window which are used for controlling the air to vertically circulate from the ventilation hole.
2. The belt coal mining device according to claim 1, wherein the coal mining area mines in a face-down mining mode according to the inclination angle of the coal seam, the inclination angle of the coal seam is a face-down mining inclination angle, and the face-down mining inclination angle is 4-20 degrees.
3. The apparatus according to claim 2, wherein the mining direction of the bottom mining mode is from an air intake roadway to a return roadway.
4. The apparatus of claim 1, wherein the mining length of the coal seam strip from bottom to top is 50-80m, and the mining width of the coal seam strip is 4-15 m.
5. The device of claim 1, wherein the mining included angle between the coal seam strip and the air intake roadway is 110-140 degrees.
6. The mining device of claim 1, wherein coal transportation equipment is installed in the coal-conveying roadway and the air-intake roadway of the mining area for conveying coal out according to the coal conveying direction.
7. The apparatus according to claim 1, wherein the diameter of the ventilation hole is 0.4-1 m.
8. The coal mining method of the borehole type full wind pressure ventilation strip type coal mining device according to any one of claims 1 to 7, characterized by comprising the following steps:
1) the coal mining area completes mining of a first strip according to the inclination angle of the coal bed in an overhead mining mode, a lower air door and an adjusting air window are installed at the lower end of a first coal pillar, and an upper air door and an adjusting air window are installed at the upper end of the first coal pillar; normal ventilation is from an air inlet lane to a lower air door and an adjusting air window, passes through a gob area with a strip I to an upper air door and an adjusting air window, and passes through a return air lane to a return air lane connection lane to form full air pressure ventilation;
2) constructing a mining second strip, installing a drilling machine at the position of the air inlet roadway, which is right opposite to the mining second strip, and starting to open the ventilation hole, wherein the drilling machine opens the ventilation hole along the upward direction of the working surface of the mining second strip until the whole mining second strip is penetrated;
3) when the coal seam is high in hardness and not easy to collapse, the short pipe is installed in the drill rod withdrawing direction along with the drill rod withdrawing when the drill rod is ready to be withdrawn after the ventilation holes of the second strip are communicated, and when the drill rod is completely withdrawn, ventilation pipelines are completely installed and laid in the whole drilling hole to form the ventilation holes;
4) when the coal seam is low in hardness and easy to collapse, the strip II is sleeved outside the drill rod from bottom to top through the short pipe while drilling the ventilation hole through the drilling machine, the strip II extends into the drill hole along the direction of the drill rod, the drill rod is connected with the short pipe with the same length, the short pipe with the same length is installed at the same time after the drill rod is drilled, and the ventilation pipeline is completely installed and laid in the whole drill hole to form the ventilation hole;
5) meanwhile, the lower air door and the air adjusting window, the upper air door and the air adjusting window are closed, and fresh air flows along with the air inlet lane, through the ventilation pipeline in the mining strip II, through the air return lane and then into the air return lane connection lane, so that full-air-pressure ventilation is formed;
6) adopting mining equipment to implement coal mining operation at the position of the air inlet tunnel corresponding to the second mining strip, mining along with the advance of mining, mining all coal around the ventilation pipeline, detaching and taking the ventilation pipeline at the pipeline connection position each time, then continuing to mine coal, repeating the steps until the second mining strip is finished, and carrying out full wind pressure ventilation in the second mining strip;
7) after the second stripe is mined, a lower air door, an adjusting air window, an upper air door and an adjusting air window which are the same as the upper end and the lower end of the first coal pillar are arranged at the upper end and the lower end of the second coal pillar, and the whole working face keeps normal full air pressure ventilation;
8) and then, installing the drilling machine at the position of the air inlet roadway, which is right opposite to the position for mining the third strip, starting to open the air vent, repeating the steps from 2 to 7, and completing the mining of the third strip, and repeating the steps to complete the mining of the fourth strip, the fifth strip and the strip of the whole working face.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010944061.9A CN111927455A (en) | 2020-09-10 | 2020-09-10 | Drilling type full-air-pressure ventilation strip type coal mining device and coal mining method |
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| CN202010944061.9A CN111927455A (en) | 2020-09-10 | 2020-09-10 | Drilling type full-air-pressure ventilation strip type coal mining device and coal mining method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116971817A (en) * | 2023-09-25 | 2023-10-31 | 太原理工大学 | High-gas working face ventilation method for alternately entering and returning air in gallery |
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| CN109915198A (en) * | 2019-04-16 | 2019-06-21 | 河南理工大学 | Coal working face advance borehole full blast presses drawing-off gas method |
| CN111622759A (en) * | 2020-06-03 | 2020-09-04 | 中煤能源研究院有限责任公司 | Double-lane strip type triangular coal mining method |
| CN212296363U (en) * | 2020-09-10 | 2021-01-05 | 山东为华智能设备制造有限公司 | Drilling type full-wind-pressure ventilation strip coal mining device |
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2020
- 2020-09-10 CN CN202010944061.9A patent/CN111927455A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105275487A (en) * | 2015-10-27 | 2016-01-27 | 何满潮 | Long-arm mining N00 construction method ventilation system |
| CN107829736A (en) * | 2017-08-03 | 2018-03-23 | 西安科技大学 | A kind of colliery Striping noise and filling displacement coal column method |
| CN109915198A (en) * | 2019-04-16 | 2019-06-21 | 河南理工大学 | Coal working face advance borehole full blast presses drawing-off gas method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN116971817A (en) * | 2023-09-25 | 2023-10-31 | 太原理工大学 | High-gas working face ventilation method for alternately entering and returning air in gallery |
| CN116971817B (en) * | 2023-09-25 | 2023-12-12 | 太原理工大学 | High-gas working face ventilation method for alternately entering and returning air in gallery |
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