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Single and low-air-permeability coal bed gas control method

A coal seam gas and gas permeability technology, applied in the field of underground safety, can solve the problems of difficult gas extraction, frequent and single gas exceeding the limit, etc.

Active Publication Date: 2013-11-27
山西潞安环保能源开发股份有限公司常村煤矿
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AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a single, low-permeability coal seam gas control method, to solve the current problem of difficult gas drainage when mining a single, low-permeability coal seam, and frequent gas overruns in the return airway and the upper corner during the mining process

Method used

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  • Single and low-air-permeability coal bed gas control method
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  • Single and low-air-permeability coal bed gas control method

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Embodiment Construction

[0016] Such as figure 1 , 2 , 3 shows a single, low permeability coal seam gas control method,

[0017] 1) Establish a high-level gas drainage lane. The high-level gas drainage lane is located on the roof of the middle sandstone layer, with a horizontal distance of 32 meters from the return air lane and a vertical height of 27 meters from the coal seam roof. The cross-section of the high-level gas drainage lane is 3.5mx2. 8m;

[0018] 2) When one end of the high-level gas drainage roadway is 80 meters away from the cut hole, excavate down along the horizontal angle of 10° to the second layer of siltstone on the roof of the coal seam; the other end of the high-level gas drainage roadway stops mining at the working face of the coal seam When the line is parallel to the position, the oblique downward excavation is connected with the belt lane, and an exhaust fan is installed at the connection port;

[0019] 3) Establish a half-coal rock roadway, the horizontal distance of the ...

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Abstract

The invention belongs to the field of underground safety and particularly relates to a single and low-air-permeability coal bed gas control method. By combining high position lane pumping with high position drilling to conduct comprehensive control on goaf gas and by combining a half-coal tunnel with low position drilling to control corner gas on a working face, a gas comprehensive control method suitable for a single and low-air-permeability coal bed is achieved, and safe extraction of the coal bed working face is ensured. The single and low-air-permeability coal bed gas control method is simple and easy to use and good in gas control effect.

Description

technical field [0001] The invention belongs to the field of downhole safety, and in particular relates to a single, low-permeability coal seam gas control method. Background technique [0002] Gas hazard is one of the serious underground hazards. Gas is the general term for harmful gases underground. Because gas is flammable, it is very easy to cause mine fires. High gas concentration can easily trigger gas explosion and cause serious accidents. Due to the particularity of coal seams, different types of coal seams have their own characteristics, and there are different difficulties in the mining process. Among them, the single and soft coal seams have low air permeability, and the gas extraction is difficult. Problems such as limited frequency seriously threaten the safe mining of the working face and seriously restrict the long-term strategic development of the mine. Contents of the invention [0003] The purpose of the present invention is to provide a single, low-per...

Claims

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Application Information

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IPC IPC(8): E21F7/00
Inventor 卢志刚李会双郑祥举王振刚白志鹏刑萌韩院生杨亮煜赵卫
Owner 山西潞安环保能源开发股份有限公司常村煤矿
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