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Method for reinforcing and sealing coal mine and preventing gas

A gas and coal mine technology, applied in the field of coal mine reinforcement and airtight gas prevention and control, can solve problems such as air leakage and gas gushing out, achieve the effects of improving overall strength, preventing corrosion reaction, and ensuring long-term stability

Active Publication Date: 2010-01-27
SHANXI JINCHENG ANTHRACITE COAL MINING GRP CO LTD
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Problems solved by technology

[0003] The present invention provides a method for coal mine reinforcement and airtight prevention and control of gas in order to solve the problems of air leakage and gas gushing caused by disturbance of the coal rock layer and cracking in the existing coal mine mining process.

Method used

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  • Method for reinforcing and sealing coal mine and preventing gas
  • Method for reinforcing and sealing coal mine and preventing gas
  • Method for reinforcing and sealing coal mine and preventing gas

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Embodiment Construction

[0019] The object of implementation of the present invention is the following four airtight walls of the mine

[0020] Site overview: ①11301 上 Into the shelf Yokogawa, ②11212 下 Hengchuan, ③ end of Lane 92230 and ④ 8212 下 The four seals of the alley are all built of stone, 0.5 meters thick, the depth of the two side grooves is 0.5-0.8 meters, and the cross-section is 10-15 square meters. ①11301 上 Into the shelf Yokogawa, ②11212 下 The airtight walls of Hengchuan are basically intact, but the ventilation negative pressure is relatively large, and the air leakage to the outside is serious. CH 4 up to 1.3%, the roadway is supported by I-beams and wooden sheds, and the direct roof is siltstone, which is basically complete; # In the coal seam, the immediate top is K 4 Limestone, relatively complete; ④8212 下 Roadway closed, CH 4 : 0.2%, CO 2 : 17%. The roadway is supported by I-shaped steel, and the direct roof is siltstone, the roof is relatively broken, and the roof is ser...

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Abstract

The invention relates to the technology of coal mine gas governance, in particular to a method for reinforcing and sealing coal mine and preventing gas. The method solves the problems of air leak and gas emission caused by cracks formed by disturbing coal petrology bed during coal mining in the prior art. The method comprises the following steps: modifying and reinforcing the support of neighbor sealing tunnels; drilling and grouting at the outer side of a sealing wall; and spraying polymer material at the surface of the sealing wall to reach a target for reinforcing the sealing wall and plugging the cracks of the wall. After reinforcing and plugging the sealing wall of the tunnel, softly cracked coal rock is cemented into one body, so that the whole intensity of wall rock in a whole sealing region is greatly improved, the average sectional shrinking ratio of the wall rock of the tunnel is less than 3%, the average air leak ratio of the sealing zone of the tunnel is reduced by more than 96%, and gas emission amount meets the requirement of the safety rules of the coal mine.

Description

technical field [0001] The invention relates to a coal mine gas control technology, in particular to a method for coal mine reinforcement and airtight prevention and control of gas. Background technique [0002] At present, the resources of most coal mines are facing exhaustion, and miners have also begun to mine the isolated island faces and coal pillars left over from the past. Affected by this kind of mining, most of the ventilation facilities built before have been damaged to varying degrees, and some roadways have been sealed and deformed. Cracks lead to air leakage and a large amount of gas gushing out, increasing the ineffective air volume of mine ventilation and the gas gushing out of the roadway. In order to prevent a large amount of air leakage and block gas, in the process of mining these legacy coal mines, a large amount of materials and man-hours have to be invested in maintenance, and the maintenance is repeated many times, and the effect is not good. Therefor...

Claims

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Application Information

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IPC IPC(8): E21F7/00E21D21/00E21F15/00
Inventor 贺天才王茂盛程根马郑跃斌杨军虎周玉怀张江斌李迎军
Owner SHANXI JINCHENG ANTHRACITE COAL MINING GRP CO LTD
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