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A prevention and control method of gas combustion caused by hard roof collapse in high gas stope

A technology with a hard roof and a collapsed roof, which is used in gas discharge, dust prevention, mining equipment, etc., can solve problems such as the lack of systematic consideration of safety accident prevention measures, achieve a simple and easy construction method, and reduce the probability of gas explosion. , the control effect is remarkable

Active Publication Date: 2016-09-14
SHANDONG UNIV OF SCI & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In the past, sufficient attention has not been paid to the gas ignited by the collapse of the hard roof under similar conditions, so the prevention and control measures for such safety accidents have not been systematically considered.

Method used

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  • A prevention and control method of gas combustion caused by hard roof collapse in high gas stope
  • A prevention and control method of gas combustion caused by hard roof collapse in high gas stope
  • A prevention and control method of gas combustion caused by hard roof collapse in high gas stope

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Embodiment Construction

[0033] Such as Figure 1-8 As shown, the prevention and control method of the gas caused by the collapse of the hard roof in the high gas stope is realized through the following steps:

[0034] 1) Carry out advance pre-pumping of gas in this coal seam;

[0035] 2) Set up a Y-shaped combination ventilation lane on the upper part of the mining face to form a positive pressure parallel booster ventilation system on the mining face for ventilation;

[0036] 3) High-level drainage of gas in the upper area of ​​the goaf;

[0037] 4) Pre-splitting blasting is carried out on the hard roof above the coal seam, high-pressure water injection is carried out on the pre-splitting deep holes after blasting, and high-pressure water is used to further crack the cracks generated by blasting. Generating heat to cool down.

[0038] As a preferred mode, the Y-shaped combined ventilation lane in the step 2) is composed of the lower air inlet lane 1, the upper air inlet lane 2 and the special ret...

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Abstract

The invention discloses a method for preventing a hard roof of a high-gas stope from collapsing and falling to burn gas, and relates to the technical field of coal mine safety. Preventing measures are taken from multiple aspects of the factors of gas detonation caused by collapsing and falling of the hard roof of a stope face of a highly gassy mine, the construction method is easy and convenient to implement, through experiments of many times, the preventing effect is obvious, cost is low, the method is suitable for being applied and popularized within a large range of a mine lot, the probability that the hard roof of the highly gassy mine causes gas detonation is reduced, and the potential hazard to personal safety of underground coal miners is reduced.

Description

technical field [0001] The invention relates to the technical field of coal mine safety, in particular to a method for preventing and controlling the combustion of gas caused by the collapse of a hard roof in a high-gas stope. Background technique [0002] As early as 1887, the Prussian Mine Gas Committee pointed out for the first time the possibility of gas explosion and combustion caused by the mutual friction of rocks; and believed that the fire source of the gas ignition was when the roof of the goaf fell or a large number of rocks in the old roadway suddenly broke formed by friction. Before 2000 in my country, gas explosions or deflagration occurred in goafs in Jincheng, Yangcheng, Qinshui and other coal mines in Shanxi. According to measurements, when the gas concentration reaches more than 5% when the goaf is 22m away from the working face, if the old roof in the suspended roof area collapses in a large area, the probability of gas explosion (combustion) accidents in...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21F7/00
CPCE21F1/00E21F5/00E21F7/00
Inventor 秦广鹏蒋金泉曹静张培鹏
Owner SHANDONG UNIV OF SCI & TECH
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