CN102071958B - Inverse Y-shaped ventilation method for coal mining working face - Google Patents
Inverse Y-shaped ventilation method for coal mining working face Download PDFInfo
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- CN102071958B CN102071958B CN201110028792XA CN201110028792A CN102071958B CN 102071958 B CN102071958 B CN 102071958B CN 201110028792X A CN201110028792X A CN 201110028792XA CN 201110028792 A CN201110028792 A CN 201110028792A CN 102071958 B CN102071958 B CN 102071958B
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- roadway
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- lane
- connection roadway
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- 238000009423 ventilation Methods 0.000 title claims abstract description 24
- 238000000034 method Methods 0.000 title claims abstract description 20
- 239000003245 coal Substances 0.000 title claims abstract description 13
- 238000005065 mining Methods 0.000 title claims abstract description 12
- 238000000605 extraction Methods 0.000 claims description 13
- 238000010276 construction Methods 0.000 claims description 7
- 230000015572 biosynthetic process Effects 0.000 claims description 2
- 238000009825 accumulation Methods 0.000 abstract description 4
- 238000007789 sealing Methods 0.000 abstract description 3
- 238000005192 partition Methods 0.000 abstract description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 6
- 239000011435 rock Substances 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 238000012423 maintenance Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 241001211590 Lanelater Species 0.000 description 1
- 240000007594 Oryza sativa Species 0.000 description 1
- 235000007164 Oryza sativa Nutrition 0.000 description 1
- 238000005273 aeration Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000002674 ointment Substances 0.000 description 1
- 235000009566 rice Nutrition 0.000 description 1
- 230000003245 working effect Effects 0.000 description 1
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Abstract
The invention relates to an inverse Y-shaped ventilation method for a coal mining working face. In the method, a transportation roadway is arranged on one side of the coal mining working face; a railway roadway and a return air roadway are sequentially arranged on the other side of the coal mining working face; coal pillars are positioned between the railway roadway and the return air roadway; contact roadways are formed at certain intervals; sealed partition walls are arranged among the contact roadways; before the working face is actually mined, the contact roadways near the working face are communicated so as to form a return air contact roadway; a beside-roadway wall body is built along the border of a gob, which is close to the back of the working face; a sealing wall is constructed at the position which is 1 to 2m away from the back of the return air contact roadway so as to seal a gob-side entry and the return air roadway; when the working face is actually mined, air flow passes through the railway roadway and the transportation roadway to enter the coal mining work face and returns to the return air roadway through the gob-side entry and the return air contact roadway; and the stroke of the air flow forms an inverse Y shape. The ventilation method is characterized by simple structure and stable air flow, solves the problem of gas accumulation at the upper corner of an actual mining working face and the problem that the god-side entry is difficult to maintain, and has obvious social and economic benefits.
Description
Technical field
The present invention relates to the coal mine work area aeration technology, the anti-Y type of especially a kind of coal-face method of ventilation.
Background technology
The ventilation system of coal-face is the important composition unit of mine ventilation system, its safety in production and economic benefit that directly has influence on full mine whether reasonable in design.Especially gaseous mine, the selection of rational ventilation mode can obviously reduce the gas density of work plane, and can effectively control the gas density of return aircourse, and the safe and efficient production of safeguard work face is had great importance.In fact; Receive the influence of mine pressure; Roadway workface is arranged and the selection of draft type is not to follow one's bent, the domestic U type ventilation system that generally adopts, and this draft type is simple in structure, unstable airflow, the roadway maintenance engineering quantity is little, inleakage is low; But its maximum shortcoming is a face upper corner angle occurs gas exceeding limit easily, and therefore 80% face gas explosion accident takes place according to statistics.
China's mine of western adopts work plane three lanes to arrange " U+L " type draft type mostly; Work plane one side is arranged two tunnels, is provided with connection roadway between the tunnel, and this draft type can solve upper corner methane accumulation problem to a certain extent; But return gets into the return aircourse through the goaf; Do not isolate, directly be communicated with between the false lane of return air and the goaf, belong to the goaf and ventilate, the regulation of seriously 116 of violations " safety regulations in coal mine " " air intake of getting working face and return air must not through goaf or roof fall district "; Gas density in the connection roadway of tunnel can not be controlled simultaneously, still is easy to generate gas exceeding limit.
The mode of gob side entry retaining is taked in the working face extraction tunnel; Return gets into the return aircourse through gob side entry retaining, forms Y type ventilation system, makes main flow direction of leaking out of work plane and goaf stay the lane; Fundamentally solve a upper corner methane accumulation difficult problem, significantly reduced the face gas accident that transfinites.The disadvantage of this mode is that to protect the lane difficulty along sky bigger; The stope of large-scale advanced mine advances length often to reach km even reaches two over thousands of rice; Stope drift active workings are longer service time; Under the influence of the long-term aggravating activities of top board, implement gob side entry retaining and objectively have a bigger difficult problem, for example can not effectively solve the large deformation of gob side entry retaining country rock problem, stay the lane later stage to need bigger tunnel to expand brush reinstatement works amount etc.
Summary of the invention
In order to solve the problem that exists in the coal-face ventilation system, the present invention proposes the anti-Y type of coal-face method of ventilation.
For realizing above-mentioned purpose, the present invention adopts following technical scheme: the anti-Y type of this coal-face method of ventilation, and it has designed a kind of tunnel of realizing that anti-Y type ventilates, and comprises gob side entry retaining, transportation lane, track lane, return airway, connection roadway and return air connection roadway; Side at coal-face is provided with a transportation lane; The opposite side of coal-face is disposed in order track lane and the return airway that is parallel to each other; Track lane and transportation lane while double as intake; Be coal column between track lane and the return airway, and whenever open a connection roadway, track lane and return airway are communicated with at a distance from a segment distance; Have the partition wall of sealing in the middle of the connection roadway, prevent to leak out; Before the working face extraction, near the connection roadway the work plane is got through, formed the return air connection roadway; During working face extraction,, construct the other body of wall in lane along the edge, goaf, make the track lane that is in the work plane rear become gob side entry retaining immediately following the rear of work plane; At return air connection roadway rear 1～2m construction fire dam that gob side entry retaining and return airway is airtight; During working face extraction, distinguished and admirable through track lane and transportation lane entering coal-face, flow in the return airway again through gob side entry retaining, return air connection roadway; Distinguished and admirable stroke forms anti-Y type; When work plane is pushed into next connection roadway, this connection roadway is opened return air, and at its rear construction envelope wall; The rest may be inferred, finishes until working face extraction.
The spacing of connection roadway presses rule to confirm according to the interim ore deposit of gob side entry retaining, is 1/4～1/2 of coal-face (4) width.
Track lane and return airway spacing are 20～40m.
The length maximum of gob side entry retaining is no more than the spacing of connection roadway.
The width of the other body of wall in lane is 0.8～1.2 times of mining height, and height is identical with mining height.
The invention has the beneficial effects as follows: the anti-Y type of this coal-face method of ventilation has fundamentally solved the difficult problem of stope upper corner methane accumulation.Through the anti-Y type draft type of gob-side entry retaining method realization work plane, simple in structure, unstable airflow has realized that the gas density of return aircourse is controlled, can effectively control return airway gas exceeding limit phenomenon; Solved the difficult problem of maintenance of gob side entry retaining; Because staying the lane to remain at the ore deposit pressure manifests the unconspicuous stage; Avoided staying lane surrouding rock deformation peak region fully; Can significantly reduce the maintenance difficulties and the support cost that stay the lane; Innovated original work plane gob-side entry retaining Y-type ventilation technology, generally adopting work plane and deep-well or the soft rock condition of one side three lanes " U+L " type ventilation system to stay difficulty big work plane in lane to adopt the Y type to ventilate to administer coal-bed gas for China western part provides new way, new method, has remarkable social benefit and economic benefit.
Description of drawings
Below in conjunction with accompanying drawing and embodiment the present invention is described further.
Accompanying drawing 1 is the example structure sketch map of the anti-Y type of this coal-face method of ventilation.
Among the figure, the 1. other body of wall in lane, 2. gob side entry retaining, 3. goaf, 4. coal-face, 5. transportation lane, 6. track lane, 7. return airway, 8. connection roadway, 9. coal column, 10. pressure bulkhead, 11. return air connection roadways, 12. fire dams.
The specific embodiment
In accompanying drawing 1, the anti-Y type of this coal-face method of ventilation, it has designed a kind of tunnel of realizing that anti-Y type ventilates, and comprises gob side entry retaining 2, transportation lane 5, track lane 6, return airway 7, connection roadway 8 and return air connection roadway 11; Side at coal-face 4 is provided with a transportation lane 5; The opposite side of coal-face 4 is disposed in order the track lane 6 and return airway 7 that is parallel to each other; Track lane 6 and 5 while of transportation lane double as intake; Be coal column 9 between track lane 6 and the return airway 7, and whenever open a connection roadway 8, track lane 6 and return airway 7 are communicated with at a distance from a segment distance; Have pressure bulkhead 10 in the middle of the connection roadway 8, prevent to leak out; Before the working face extraction, near the connection roadway 8 the coal-face 4 is got through, formed return air connection roadway 11; Immediately following the rear of coal-face 4, the other body of wall 1 in lane is constructed at 3 edges along the goaf, makes the track lane 6 that is in the work plane rear become gob side entry retaining 2; 1～2m construction fire dam 12 is airtight with gob side entry retaining 2 and return airway 7 at return air connection roadway 11 rears; During working face extraction, distinguished and admirable through track lane 6 and transportation lane 5 entering coal-faces 4, flow into again in the return airway 7 through gob side entry retaining 2, return air connection roadway 11; Distinguished and admirable stroke forms anti-Y type; When work plane is pushed into next connection roadway 8, this connection roadway 8 is opened formation return air connection roadway 11 return air, and at its rear construction fire dam 12; The rest may be inferred, finishes until working face extraction.
The interval S of connection roadway 8 presses rule to confirm according to the interim ore deposit of gob side entry retaining 2, is 1/4～1/2 of coal-face 4 width, i.e. S=(1/4～1/2) L.
Track lane 6 is 20～40m with the spacing B of return airway 7.
The length maximum of gob side entry retaining 2 is no more than the interval S of connection roadway 8.
The width of the other body of wall 1 in lane is 0.8～1.2 times of mining height, and height is identical with mining height.The step that realizes the anti-Y type of this coal-face method of ventilation is following:
When (1) preparing this section coal-face 4; In coal seam, coal-face 4 both sides, arrange three tunnels; Wherein the return side arrangement pitch is a track lane 6 and return airway 7 of 20～40m, and every at a distance from certain connection roadway 8 of distance layout, and connection roadway 8 connects track lane 6 and return airway 7; Opposite side is arranged transportation lane 5, track lane 6 and transportation lane 5 double as intakes;
(2) before the working face extraction, keep return air connection roadway 11 unimpeded, remaining connection roadway 8 usefulness pressure bulkheads 10 sealing; Prevent to leak out; Distinguished and admirable by track lane 6 and transportation lane 5 entering coal-faces 4, in return air connection roadway 11 inflow return airways 7, distinguished and admirable flow process forms instead " Y " type.
When (3) work plane normally advances back production; Immediately following the work plane rear along the goaf 3 edge; Adopt building block to pile up perhaps ointment material filling and construct the other body of wall 1 in lane, make the track lane 6 at work plane rear become gob side entry retaining 2, goaf 3 seal; Prevent that the goaf from leaking out, can effectively avoid in the return aircourse problem of gas exceeding limit easily.
(4) along with the propelling of work plane, the length of gob side entry retaining 2 constantly increases, but its maximum length is no more than the spacing of connection roadway 8; When the advance of the face to next connection roadway 8; The enclosing wall 10 of new connection roadway 8 is opened, and the connection roadway 8 after opening promptly becomes new return air connection roadway 11, and is at 1～2m place, rear of new return air connection roadway 11 construction fire dam 12 that gob side entry retaining 2 is airtight simultaneously; And, prevent to leak out to the rear, tunnel at the correspondence position of return airway 7 fire dam 12 of also constructing.
(5) along with coal-face 4 is constantly pushed ahead; Continuous repeating step (4); Finish until working face extraction, work plane dirty distinguished and admirable through gob side entry retaining 2, return air connection roadway 11 gets into return airway 7 then; Because the length of gob side entry retaining 2 is little, the ore deposit pressure manifests acutely, surrouding rock deformation is little, does not need to expand brush again.
Claims (5)
1. the anti-Y type of coal-face method of ventilation, it has designed a kind of tunnel of realizing that anti-Y type ventilates, and comprises gob side entry retaining (2), transportation lane (5), track lane (6), return airway (7), connection roadway (8) and return air connection roadway (11); It is characterized in that: the side at coal-face (4) is provided with a transportation lane (5); The opposite side of coal-face (4) is disposed in order track lane (6) and the return airway (7) that is parallel to each other; Track lane (6) and transportation lane (5) be the double as intake simultaneously; Be coal column (9) between track lane (6) and the return airway (7), and whenever open a connection roadway (8), track lane (6) and return airway (7) are communicated with at a distance from a segment distance; Have pressure bulkhead (10) in the middle of the connection roadway (8), prevent to leak out; Before the working face extraction, near the connection roadway (8) the coal-face (4) is got through, formed return air connection roadway (11); Immediately following the rear of coal-face (4), the other body of wall (1) in lane is constructed at (3) edge along the goaf, makes the track lane (6) that is in the work plane rear become gob side entry retaining (2); At return air connection roadway (11) rear 1～2m construction fire dam (12) that gob side entry retaining (2) and return airway (7) is airtight; During working face extraction, distinguished and admirable through track lane (6) and transportation lane (5) entering coal-face (4), flow into again in the return airway (7) through gob side entry retaining (2), return air connection roadway (11); Distinguished and admirable stroke forms anti-Y type; When work plane is pushed into next connection roadway (8), this connection roadway (8) is opened formation return air connection roadway (11) return air, and at its rear construction fire dam (12); The rest may be inferred, finishes until working face extraction.
2. according to the anti-Y type of the said a kind of coal-face of claim 1 method of ventilation, it is characterized in that: the spacing of connection roadway (8) is 1/4～1/2 of coal-face (a 4) width.
3. according to the anti-Y type of the said a kind of coal-face of claim 1 method of ventilation, it is characterized in that: track lane (6) are 20～40m with the spacing of return airway (7).
4. according to the anti-Y type of the said a kind of coal-face of claim 1 method of ventilation, it is characterized in that: the length maximum of gob side entry retaining (2) is no more than the spacing of connection roadway (8).
5. according to the anti-Y type of the said a kind of coal-face of claim 1 method of ventilation, it is characterized in that: the width of the other body of wall in lane (1) is 0.8～1.2 times of mining height, and height is identical with mining height.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110028792XA CN102071958B (en) | 2011-01-21 | 2011-01-21 | Inverse Y-shaped ventilation method for coal mining working face |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110028792XA CN102071958B (en) | 2011-01-21 | 2011-01-21 | Inverse Y-shaped ventilation method for coal mining working face |
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| Publication Number | Publication Date |
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| CN102071958A CN102071958A (en) | 2011-05-25 |
| CN102071958B true CN102071958B (en) | 2012-07-25 |
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| CN201110028792XA Expired - Fee Related CN102071958B (en) | 2011-01-21 | 2011-01-21 | Inverse Y-shaped ventilation method for coal mining working face |
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| CN102071958A (en) | 2011-05-25 |
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