CN113236348A - Coal seam slit gas treatment outburst prevention process - Google Patents
Coal seam slit gas treatment outburst prevention process Download PDFInfo
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- CN113236348A CN113236348A CN202110737376.0A CN202110737376A CN113236348A CN 113236348 A CN113236348 A CN 113236348A CN 202110737376 A CN202110737376 A CN 202110737376A CN 113236348 A CN113236348 A CN 113236348A
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- 239000003245 coal Substances 0.000 title claims abstract description 83
- 238000000034 method Methods 0.000 title claims abstract description 25
- 230000002265 prevention Effects 0.000 title claims abstract description 24
- 230000008569 process Effects 0.000 title claims abstract description 20
- 238000005065 mining Methods 0.000 claims abstract description 65
- 238000005520 cutting process Methods 0.000 claims abstract description 31
- 238000005553 drilling Methods 0.000 claims abstract description 29
- 238000007789 sealing Methods 0.000 claims abstract description 27
- 238000000605 extraction Methods 0.000 claims abstract description 24
- 230000007246 mechanism Effects 0.000 claims description 14
- 239000004568 cement Substances 0.000 claims description 3
- 238000010276 construction Methods 0.000 abstract description 7
- 230000000694 effects Effects 0.000 abstract description 5
- 238000004891 communication Methods 0.000 abstract description 3
- 238000009423 ventilation Methods 0.000 abstract description 2
- 239000010410 layer Substances 0.000 description 6
- 230000008030 elimination Effects 0.000 description 4
- 238000003379 elimination reaction Methods 0.000 description 4
- 239000011241 protective layer Substances 0.000 description 4
- 238000005086 pumping Methods 0.000 description 4
- 239000011435 rock Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000000565 sealant Substances 0.000 description 1
- 239000002910 solid waste Substances 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
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Classifications
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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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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21C—MINING OR QUARRYING
- E21C25/00—Cutting machines, i.e. for making slits approximately parallel or perpendicular to the seam
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21C—MINING OR QUARRYING
- E21C35/00—Details of, or accessories for, machines for slitting or completely freeing the mineral from the seam, not provided for in groups E21C25/00 - E21C33/00, E21C37/00 or E21C39/00
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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
-
- 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
- E21F1/006—Ventilation at the working face of galleries or tunnels
-
- 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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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Mechanical Engineering (AREA)
- Drilling And Exploitation, And Mining Machines And Methods (AREA)
Abstract
The invention provides a coal seam slotting gas control outburst prevention process, which belongs to the technical field of mine ventilation safety, and comprises the following steps of firstly, mining a working face air lane and a working face machine lane at two sides of a coal seam along the longitudinal direction; then, excavating an initial cutting channel with two ends respectively communicated with the working face air way and the working face machine way in the middle of the coal seam along the transverse direction; then, a sealing wall is arranged at the front part of the working face air lane and the front part of the working face machine lane, and a gas extraction pipe is arranged at the sealing wall positioned at the front part of the working face air lane; then, a communicating tunnel is communicated between the front parts of the working face air tunnel and the working face machine tunnel, and the communicating tunnel is positioned at the front end of the sealing wall; and finally, the primary cutting channel, the working face air way, the communication way and the working face machine way are enclosed to form a coal seam mining part, and the coal seam mining part is matched with a sawing mining device. The invention not only can reduce the labor intensity of drilling construction and the gas extraction period, but also can eliminate the blank zone of gas extraction caused by the deviation of the drilling track, thereby improving the effectiveness of outburst prevention effect.
Description
Technical Field
The invention relates to the technical field of mine ventilation safety, in particular to a coal seam slotting gas treatment outburst prevention process.
Background
The pre-pumping of coal seam gas and the exploitation of the protective layer are effective outburst elimination measures for safety exploitation of the outburst coal seam. No matter whether the mining condition of a protective layer exists or not, surface drilling, cross-layer drilling or bedding drilling and pre-pumping coal bed gas are necessary choices for eliminating outbursts of the coal bed. The gas drilling of the pre-pumping coal seam becomes a main factor for restricting the mine production succession due to large drilling engineering quantity and long construction period. And in a few mines, soft mudstone at the top/bottom of a coal mining layer is used as a protective layer, and outburst elimination of a outburst coal layer is realized by matching with drilling and pre-pumping coal layer gas. The exploitation of the mudstone as a protective layer not only increases the investment of gas control, but also needs drilling to extract coal bed gas, and in addition, the more exploited mudstone also forms the discharge of solid waste.
In the single outburst coal seam gas treatment process, a working face machine tunnel and an air tunnel top/bottom plate rock tunnel are generally constructed firstly, coal seam strip gas is pre-pumped by utilizing the rock tunnel to construct coal seam through-layer drilling holes, outburst elimination of a coal seam strip area is realized, then coal seam bedding drilling holes are constructed in the machine tunnel and the air tunnel, and the coal seam gas is pre-pumped by matching with coal seam strengthening anti-reflection measures. However, due to the limited prediction range of bedding drilling, the amount of bedding drilling engineering for two-lane construction of a working face is very large, and due to the fact that the length of a single hole of a drilling hole is large, the drilling track is deviated, and the coal seam gas is pre-pumped in the bedding drilling hole, so that the whole area of the coal seam in the range of the working face is difficult to effectively cover, so-called blank zones are formed, so that local outburst elimination cannot reach the standard, and potential safety hazards are buried for the mining of the working face.
Disclosure of Invention
In view of the above, the invention provides a coal seam slotting gas treatment outburst prevention process, which can reduce the labor intensity of drilling construction and the gas extraction period, can eliminate a gas extraction blank zone caused by the deviation of a drilling track, and improves the effectiveness of an outburst prevention effect.
In order to solve the technical problem, the invention provides a coal seam slotting gas treatment outburst prevention process, which comprises the following steps:
s1, mining a working face air lane and a working face machine lane along the longitudinal direction at two sides of the coal seam;
s2, excavating an initial cutting channel with two ends respectively communicated with the working face air way and the working face machine way along the transverse direction in the middle of the coal seam;
s3, arranging a sealing wall at the front part of the working face air lane and the front part of the working face machine lane, arranging a gas extraction pipe at the sealing wall at the front part of the working face air lane, wherein the rear end of the gas extraction pipe extends into the working face air lane, and the front end of the gas extraction pipe extends out of the sealing wall;
s4, a communicating roadway is communicated between the front parts of the working face air roadway and the working face machine roadway and is positioned at the front end of the sealing wall;
and S5, enclosing a coal seam mining part by the primary cutting channel, the working face air way, the communicating way and the working face machine way, wherein the coal seam mining part is matched with a sawing and mining device.
Further, in step S2, the number of the initial cut channels is 1.
Further, in step S2, the number of the initial cutting channels is 2 to 5, and all the initial cutting channels are arranged in parallel.
Further, the coal seam mining section includes a mined coal seam at the rear end and an unmined coal seam at the front end.
Further, the sawing and mining device comprises a sawing and mining control winch and a sawing and mining mechanism which are arranged in front of the sealing wall, and the sawing and mining mechanism is connected with the sawing and mining control winch and matched with the coal seam mining part for sawing and mining.
And furthermore, limiting devices matched with the sawing and mining mechanism are arranged in the working face air way and the working face machine way.
Further, the outer surfaces of the primary cutting channel, the working face air lane and the working face machine lane are coated with cement sealing layers.
Further, the sawing and mining mechanism adopts a frame shearer, or a sawing shearer, or a planing shearer, or a drilling shearer, or an impact shearer, or a drum shearer.
Furthermore, the width of the primary cutting channel, the working face air lane and the working face machine lane is 4-8 m, and the height of the primary cutting channel, the working face air lane and the working face machine lane is 2-5 m.
The technical scheme of the invention has the following beneficial effects:
the invention utilizes mechanical equipment to cut a seam in a coal seam, and comprises an initial cutting channel transversely arranged in the coal seam, wherein two ends of the initial cutting channel are respectively communicated with a working face air way and a working face machine way which are longitudinally arranged to enclose a coal seam mining part; sealing walls are arranged on the front portion of the working face air roadway and the front portion of the working face machine roadway, and the coal seam mining portion is matched with a sawing mining device. And (4) cutting seams into the coal seam by using a sawing and mining device. Compared with the traditional permeability-increasing method, the method is not suitable for bedding drilling, reduces the labor intensity of drilling construction and the gas extraction period, eliminates the gas extraction blank zone caused by the deviation of the drilling track, and improves the effectiveness of outburst prevention effect. The invention not only can reduce the labor intensity of drilling construction and the gas extraction period, but also can eliminate the blank zone of gas extraction caused by the deviation of the drilling track, thereby improving the effectiveness of outburst prevention effect.
Drawings
FIG. 1 is a schematic flow chart of a coal seam slotting gas treatment outburst prevention process of the invention;
FIG. 2 is a schematic diagram of a frame of a coal seam slotting gas treatment outburst prevention process of the invention;
a working face airway 1; a working face machine lane 2; a primary cutting channel 3; a sealing wall 4; a gas extraction pipe 5; a communicating lane 6; a coal seam mining section 7; the mined coal seam 7 a; an unexplored coal seam 7 b; a sawing and mining control winch 8; a sawing and mining mechanism 9; a stop device 10.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to fig. 1-2 of the embodiments of the present invention. It is to be understood that the embodiments described are only a few embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the described embodiments of the invention, are within the scope of the invention.
As shown in fig. 1-2: a coal seam gas treatment outburst prevention process for cutting seams comprises the steps of firstly, mining a working face air lane and a working face machine lane on two sides of a coal seam along the longitudinal direction; then, excavating an initial cutting channel with two ends respectively communicated with the working face air way and the working face machine way in the middle of the coal seam along the transverse direction; then, a sealing wall is arranged at the front part of the working face air lane and the front part of the working face machine lane, a gas extraction pipe is arranged at the sealing wall positioned at the front part of the working face air lane, the rear end of the gas extraction pipe extends into the working face air lane, and the front end of the gas extraction pipe extends out of the sealing wall; then, a communicating tunnel is communicated between the front parts of the working face air tunnel and the working face machine tunnel, and the communicating tunnel is positioned at the front end of the sealing wall; and finally, the primary cutting channel, the working face air way, the communication way and the working face machine way are enclosed to form a coal seam mining part, and the coal seam mining part is matched with a sawing mining device.
Specifically, as shown in fig. 1 and 2, a coal seam slotting gas treatment outburst prevention process includes the following steps:
s1, mining a working face air lane 1 and a working face machine lane 2 along the longitudinal direction at two sides of the coal seam;
s2, excavating an initial cutting channel 3 with two ends respectively communicated with the working face air way 1 and the working face machine way 2 along the transverse direction in the middle of the coal bed;
s3, arranging a sealing wall 4 at the front parts of the working face air lane 1 and the working face machine lane 2, arranging a gas extraction pipe 5 at the sealing wall 4 at the front part of the working face air lane 1, wherein the rear end of the gas extraction pipe 5 extends into the working face air lane 1, and the front end of the gas extraction pipe 5 extends out of the sealing wall 4;
s4, a communicating roadway 6 is communicated between the front parts of the working face air roadway 1 and the working face machine roadway 2, and the communicating roadway 6 is positioned at the front end of the sealing wall 4;
s5, the primary cutting channel 3, the working face air way 1, the communicating way 6 and the working face machine way 2 enclose a coal seam mining part 7, and the coal seam mining part 7 is matched with a sawing and mining device.
In one embodiment of the present invention, as shown in fig. 1, in step S2, the number of the initial cut channels 3 is 1.
In one embodiment of the present invention, in step S2, the number of the preliminary cutting channels 3 is 2 to 5, and all the preliminary cutting channels 3 are arranged in parallel. Obviously, the number of the initial cutting channels 3 may also be more, such as 3, 4, or 5, and the like, and is specifically set according to the thickness of the coal seam.
In one embodiment of the invention, as shown in FIG. 2, the coal seam mining section 7 includes a mined coal seam 7a at the rearward end and an unmined coal seam 7b at the forward end.
In one embodiment of the invention, as shown in fig. 2, the sawing and mining device comprises a sawing and mining control winch 8 and a sawing and mining mechanism 9 which are arranged in front of the sealing wall 4, wherein the sawing and mining mechanism 9 is connected with the sawing and mining control winch 8 and is matched with the coal seam mining part 7 for sawing and mining.
In one embodiment of the present invention, as shown in fig. 2, a limiting device 10 cooperating with the sawing and mining mechanism is provided in the face air lane 1 and the face machine lane 2.
In one embodiment of the invention, as shown in fig. 1, the outer surfaces of the primary cut channel 3, the face airway 1 and the face machine airway 2 are coated with a cement sealant.
In one embodiment of the invention, as shown in fig. 1, the sawing and mining mechanism 9 is a frame shearer loader, but it is clear that the sawing and mining mechanism 9 can also be of another type, for example a sawing shearer loader, or a planing shearer loader, or a drilling shearer loader, or an impact shearer loader, or a shearer loader.
In one embodiment of the present invention, as shown in fig. 1, the width of the primary cut channel 3, the working face air lane 1 and the working face machine lane 2 is 4m, and the height thereof is 2 m; it is clear that the width and height of the said primary cut channel 3, the said face airway 1 and the said face airway 2 are not limited to the above values, but may be other, but the width should be between 4m and 8m and the height should be between 2m and 5 m.
The working method (or working principle) of the invention is as follows: the invention utilizes mechanical equipment to cut a seam in a coal seam, and comprises an initial cutting channel transversely arranged in the coal seam, wherein two ends of the initial cutting channel are respectively communicated with a working face air way and a working face machine way which are longitudinally arranged to enclose a coal seam mining part; sealing walls are arranged on the front portion of the working face air roadway and the front portion of the working face machine roadway, and the coal seam mining portion is matched with a sawing mining device. And (4) cutting seams into the coal seam by using a sawing and mining device. Compared with the traditional permeability-increasing method, the method is not suitable for bedding drilling, reduces the labor intensity of drilling construction and the gas extraction period, eliminates the gas extraction blank zone caused by the deviation of the drilling track, and improves the effectiveness of outburst prevention effect.
In the present invention, unless otherwise explicitly specified or limited, for example, it may be fixedly attached, detachably attached, or integrated; can be mechanically or electrically connected; the terms may be directly connected or indirectly connected through an intermediate, and may be communication between two elements or interaction relationship between two elements, unless otherwise specifically limited, and the specific meaning of the terms in the present invention will be understood by those skilled in the art according to specific situations.
While the foregoing is directed to the preferred embodiment of the present invention, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (9)
1. A coal seam slotting gas treatment outburst prevention process is characterized by comprising the following steps:
s1, mining a working face air lane and a working face machine lane along the longitudinal direction at two sides of the coal seam;
s2, excavating an initial cutting channel with two ends respectively communicated with the working face air way and the working face machine way along the transverse direction in the middle of the coal seam;
s3, arranging a sealing wall at the front part of the working face air lane and the front part of the working face machine lane, arranging a gas extraction pipe at the sealing wall at the front part of the working face air lane, wherein the rear end of the gas extraction pipe extends into the working face air lane, and the front end of the gas extraction pipe extends out of the sealing wall;
s4, a communicating roadway is communicated between the front parts of the working face air roadway and the working face machine roadway and is positioned at the front end of the sealing wall;
and S5, enclosing a coal seam mining part by the primary cutting channel, the working face air way, the communicating way and the working face machine way, wherein the coal seam mining part is matched with a sawing and mining device.
2. The coal seam slotting gas treatment outburst prevention process of claim 1, wherein in the step S2, the number of the primary cutting channels is 1.
3. The coal seam slotting gas treatment outburst prevention process of claim 1, wherein in the step S2, the number of the primary cutting channels is 2 to 5, and all the primary cutting channels are arranged in parallel.
4. The coal seam slit gas treatment outburst prevention process of any one of claims 1 to 3, wherein the coal seam mining part comprises a mined coal seam at a rear end and an unexplored coal seam at a front end.
5. The coal seam slotting gas treatment outburst prevention process as claimed in claim 1, wherein the sawing and mining device comprises a sawing and mining control winch and a sawing and mining mechanism which are arranged in front of the sealing wall, and the sawing and mining mechanism is connected with the sawing and mining control winch and is matched with the coal seam mining part for sawing and mining.
6. The coal seam slotting gas treatment outburst prevention process of claim 5, wherein limiting devices matched with the sawing and mining mechanism are arranged in the working face air way and the working face machine way.
7. The coal seam slotting gas treatment outburst prevention process of claim 1, wherein the outer surfaces of the primary cutting channel, the working face air way and the working face machine way are coated with cement sealing layers.
8. The coal seam slotting gas treatment outburst prevention process of claim 5, wherein the sawing and mining mechanism adopts a frame shearer, or a sawing shearer, or a planing shearer, or a drilling shearer, or an impact shearer, or a drum shearer.
9. The coal seam slotting gas treatment outburst prevention process of claim 1, wherein the width of the primary cutting channel, the working face air lane and the working face machine lane is 4 m-8 m, and the height is 2 m-5 m.
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| CN202110737376.0A CN113236348A (en) | 2021-06-30 | 2021-06-30 | Coal seam slit gas treatment outburst prevention process |
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| CN202110737376.0A CN113236348A (en) | 2021-06-30 | 2021-06-30 | Coal seam slit gas treatment outburst prevention process |
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| CN102116169A (en) * | 2011-01-27 | 2011-07-06 | 中国矿业大学 | Drainage method for pressure-relief gas baseboard stonehead of protected seam |
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| CN107152304A (en) * | 2017-07-06 | 2017-09-12 | 贵州大学 | A kind of calm mole of underground coal mine and application method |
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| CN112145223A (en) * | 2020-09-10 | 2020-12-29 | 李章明 | Rope saw cutting device and coal bed gas permeability increasing and pressure relieving method |
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| CN113279809A (en) * | 2021-06-18 | 2021-08-20 | 平顶山市安泰华矿用安全设备制造有限公司 | Outburst eliminating construction arrangement structure for coal seam sawing and mining |
-
2021
- 2021-06-30 CN CN202110737376.0A patent/CN113236348A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5265941A (en) * | 1992-08-20 | 1993-11-30 | Tamrock World Corporation, N.V. | Underground mining system and method for developing longwall panel |
| CN101737047A (en) * | 2008-11-19 | 2010-06-16 | 孙广义 | Method for mining coal of steeply inclined thin seam |
| CN102116169A (en) * | 2011-01-27 | 2011-07-06 | 中国矿业大学 | Drainage method for pressure-relief gas baseboard stonehead of protected seam |
| CN103775127A (en) * | 2013-12-31 | 2014-05-07 | 中国矿业大学 | Method for comprehensively treating gas in low-air-permeability high-gas-content coal seam group |
| CN105401976A (en) * | 2015-12-30 | 2016-03-16 | 重庆南桐矿业有限责任公司 | Outburst prevention measure in wire saw joint-cutting region of coal seam floor |
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