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Stereo treatment method for low-occurrence and high-emission gas according to sources and zones

A technology of gas and storage, which is applied in the field of low-occupancy and high-emission gas separation and three-dimensional management, and can solve the problems of difficult pre-pumping, high gas emission management, etc.

Active Publication Date: 2017-07-28
DATONG COAL MINE GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the low gas concentration, pre-pumping is difficult, but after the impact of mining, the analysis is fast and the gushing volume is high, making it extremely difficult to control "low gas occurrence, high gas gushing"

Method used

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  • Stereo treatment method for low-occurrence and high-emission gas according to sources and zones
  • Stereo treatment method for low-occurrence and high-emission gas according to sources and zones

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Embodiment Construction

[0017] Taking the gas extraction of extra-thick coal seam mining in Datong mining area as an example below, the present invention will be further described in conjunction with the accompanying drawings:

[0018] Firstly, at the mining front of this working face 1, a row of continuous first gas drainage boreholes 2-1 are arranged at an interval of 50m vertically downward from the surface in the advancing direction of this working face 1 to the bottom of the coal seam 3 of this working face. The length of this working face 1 is 200m , the thickness of the coal seam 3 in this working face is 20m, the distance between the first gas drainage borehole 2-1 and the return airway 9 is 50m, and according to the advance position of the working face 1, at least three first gas drainage boreholes 2-1 Working at the same time, for the fractured area of ​​the advanced coal and rock mass of this working face 1, this working face 1 and the goaf 4 of this working face, which are close to the are...

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Abstract

The invention relates to drainage methods for gas sources in different zones of a working face leading coal and rock mass fractured zone, a working face and a working face goaf, and a zone close to the working face goaf in the top-coal caving mining process of an extra-thick coal seam, in particular to a stereo treatment method for low-occurrence and high-emission gas according to sources and zones. The stereo treatment method for the low-occurrence and high-emission gas by sources and zones has the following advantages that (1) through a gas drainage drilling hole, a gas drainage roadway and a strike drainage drilling hole arranged continuously, gas in different zones of the working face leading coal and rock mass fractured zone, the working face and the working face goaf can be drained, and the gas concentration in the working face is minimized; and (2) gas in a working face deep goaf can be drained at any time, and the defects that the traditional drainage method cannot drain the gas in the working face deep goaf is overcome.

Description

technical field [0001] The invention relates to a method for extracting gas sources in different areas of the goaf adjacent to the working face in the advanced coal and rock mass rupture area of ​​the working face, the working face and the goaf area of ​​the working face, and the goaf area adjacent to the working face. Low-occurrence, high-emission gas distribution and three-dimensional management method. Background technique [0002] Gas is the No. 1 killer in coal mines. Although gas accidents in coal mines have dropped significantly year by year in recent years, they still account for a relatively large proportion. Serious and extraordinarily large gas accidents occur from time to time, seriously restricting the efficient development of resources. At present, the control of gas is mainly based on pre-mining pre-extraction. This control technology can effectively reduce the gas content of coal seams in advance and reduce the frequency of gas exceeding the limit after coal ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21F7/00
CPCE21F7/00
Inventor 于斌高瑞匡铁军孟祥斌
Owner DATONG COAL MINE GRP
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