CN102071958A

CN102071958A - Inverse Y-shaped ventilation method for coal mining working face

Info

Publication number: CN102071958A
Application number: CN 201110028792
Authority: CN
Inventors: 张农; 袁亮; 韩昌良; 李桂臣; 刘冠学; 阚甲广
Original assignee: China University of Mining and Technology CUMT; Huainan Mining Group Co Ltd
Current assignee: China University of Mining and Technology CUMT; Huainan Mining Group Co Ltd
Priority date: 2011-01-21
Filing date: 2011-01-21
Publication date: 2011-05-25
Anticipated expiration: 2031-01-21
Also published as: CN102071958B

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

The anti-Y type of coal-face method of ventilation

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, be subjected to 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, 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, be provided with connection roadway between the tunnel, this draft type can solve upper corner methane accumulation problem to a certain extent, but return enters the return aircourse through the goaf, do not isolate between false lane of return air and the goaf, directly be communicated with, belonging to the goaf ventilates, the serious regulation of violating " safety regulations in coal mine " 116 " 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 is uncontrollable 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 enters 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 achieving the above object, 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 be the double as intake simultaneously; Be coal column between track lane and the return airway, and open a connection roadway, track lane and return airway are communicated with every 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 process track lane and transportation lane enter coal-face, flow in the return airway again by 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 determine 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.By 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 problem of the maintenance difficulty 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 the work plane of one side three lanes " U+L " type ventilation system and deep-well or soft rock condition 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

The invention will be further described below in conjunction with drawings and Examples.

Accompanying drawing 1 is the example structure schematic diagram 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 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 open a connection roadway 8, track lane 6 and return airway 7 are communicated with every 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; At return air connection roadway 11 rears 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 process track lane 6 and transportation lane 5 enter coal-face 4, flow into again in the return airway 7 by 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 determine 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 as follows:

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 arrange a connection roadway 8 every certain distance, 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 admirablely enter coal-face 4 by track lane 6 and transportation lane 5, flow in the return airways 7 through return air connection roadway 11, 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, the employing building block is piled up or the other body of wall 1 in lane is constructed in the ointment material filling, make the track lane 6 at work plane rear become gob side entry retaining 2, with goaf 3 seal isolation, 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 during 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, enter 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

1. A reverse Y-type ventilation method for a coal mining face, which designs a roadway that can realize reverse Y-type ventilation, including gob-side retaining roadway (2), transport roadway (5), track roadway (6), return roadway Wind lane (7), connection lane (8) and return air connection lane (11); it is characterized in that: a transport lane (5) is provided on one side of the coal mining face (4); the coal mining face (4) ) on the other side of the track lane (6) and air return lane (7) parallel to each other; (7) are coal pillars (9), and a connecting lane (8) is opened at intervals to connect the track lane (6) and the return air lane (7); a sealed partition is built in the middle of the connecting lane (8). wall (10) to prevent air leakage; before the working face is recovered, the connection roadway (8) near the coal mining face (4) is opened to form a return air connection roadway (11); closely following the rear of the coal mining face (4) , build the roadside wall (1) along the edge of the goaf (3), so that the track roadway (6) behind the working face becomes a gobside roadway (2); 1-2m behind the return air connection roadway (11) The construction airtight wall (12) seals the gob-side entry (2) and the air return entry (7); when the working face is mined, the wind flows into the coal mining face (4) through the track entry (6) and the transport entry (5), Through the gob-side retaining alley (2), the return air connection alley (11) and then flows into the return air alley (7), the stroke of the wind flow forms a reverse Y shape. When the working face is pushed to the next connection alley (8), the The connection roadway (8) is opened to form the air return connection roadway (11) return air, and the airtight wall (12) is constructed behind it, and so on, until the mining of the working face is completed.

2. A reverse Y-shaped ventilation method for a coal mining face according to claim 1, characterized in that: the distance between the connecting lanes (8) is 1/4 to 1/2 of the width of the coal mining face (4).

3. A reverse Y-shaped ventilation method for coal mining face according to claim 1, characterized in that: the distance between the track lane (6) and the return air lane (7) is 20-40m.

4. A reverse Y-shaped ventilation method for a coal mining face according to claim 1, characterized in that: the length of the gob-side retaining entry (2) does not exceed the distance between the contact entry entry (8).

5. A reverse Y-shaped ventilation method for a coal mining face according to claim 1, characterized in that: the width of the roadside wall (1) is 0.8 to 1.2 times the mining height, and the height is the same as the mining height.