Simulation experiment device of gas extraction and coal spontaneous combustion of spontaneous combustion-prone and high gas concentration coal seam goaf

A simulation experiment device, gas extraction technology, applied in gas emission, safety devices, mining equipment, etc., can solve the problems of limited practical guidance value, etc., and achieve the effect of preventing spontaneous combustion of coal and gas exceeding the limit.

Inactive Publication Date: 2014-05-07
CHINA UNIV OF MINING & TECH (BEIJING) +1
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  • Abstract
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Problems solved by technology

At present, numerical simulation is often used to study this problem, but because numerical simulation often has t

Method used

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  • Simulation experiment device of gas extraction and coal spontaneous combustion of spontaneous combustion-prone and high gas concentration coal seam goaf
  • Simulation experiment device of gas extraction and coal spontaneous combustion of spontaneous combustion-prone and high gas concentration coal seam goaf

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specific Embodiment

[0032] Such as figure 1 , figure 2 As shown, it includes U-shaped working face coal mining system, ventilation system, gas system, drainage system, and data test collection system. The U-shaped working face is composed of an air inlet roadway, a return air roadway, working face, goaf, etc. The ventilation system includes extraction fans and auxiliary devices. The mining system includes gas drainage pumps, drainage pipes, valves, flowmeters, and negative pressure gauges. The data testing and acquisition system includes wind speed sensors, temperature sensors, co sensors, connecting lines, data acquisition modules, power supplies, industrial computers, and data processing software. Wait.

[0033] The working face and the goaf are separated by canvas, and some micro-holes are arranged on the canvas to generate air leakage, simulating the situation of air leakage in the goaf under real conditions. The arrangement of micropores on the canvas is unevenly distributed. There are m...

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Abstract

The invention discloses a simulation experiment device of gas extraction and coal spontaneous combustion of a spontaneous combustion-prone and high gas concentration coal seam goaf. The simulation experiment device of the gas extraction and the coal spontaneous combustion of the spontaneous combustion-prone and high gas concentration coal seam goaf comprises a U-shaped working surface coal mining system, a ventilation system, a gas system, an extraction system, a data test and acquisition system. The U-shaped working surface coal mining system comprises an air inlet roadway, an air return roadway, a working surface and a goaf. The ventilation system comprises an exhaust ventilator and an accessory of the exhaust ventilator. The gas system comprises a gas bottle, a valve, a pressure gauge and a gas feeding pipe. The extraction system comprises a gas drainage pump, a gas drainage pipe, a valve, a flowmeter and a negative pressure sensor. The data test and acquisition system comprises an air velocity sensor, a gas concentration sensor, a temperature sensor, a co sensor, a data acquisition module, an IPC (Industrial Personal Computer) and the like. The simulation experiment device of the gas extraction and the coal spontaneous combustion of the spontaneous combustion-prone and high gas concentration coal seam goaf can truly simulate the relation between the gas extraction and the coal spontaneous combustion of the spontaneous combustion-prone and high gas concentration coal seam goaf to achieve the simultaneous testing of gas drainage and coal spontaneous combustion.

Description

technical field [0001] The invention relates to a coal mining technology, in particular to a simulation experiment device for gas drainage and coal spontaneous combustion in a goaf of a highly gassy coal seam prone to spontaneous combustion. Background technique [0002] Mine gas is a general term for various gases gushing out of coal and rock during coal mine production. In recent years, with the increase of mining depth, there are more and more high-gas mines, coal and gas outburst mines, and gas accidents continue. At present, the main measure taken for gas control is gas drainage, including gas drainage in goafs. However, some coal mines are carrying out gas drainage in goafs to control the problem of excessive gas in the upper corner, accompanied by coal spontaneous combustion. Danger. If the gas extraction negative pressure is too large, the air leakage in the goaf will increase, which will increase the risk of coal spontaneous combustion. If the negative pressure o...

Claims

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Application Information

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IPC IPC(8): E21F7/00E21F1/02
Inventor 李祥春杨春燕杨春丽聂百胜朱茹敏王紫薇
Owner CHINA UNIV OF MINING & TECH (BEIJING)
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