Simulation experiment device for gas extraction spontaneous combustion in coal bed gob region

Abstract

The invention relates to a simulation experiment device for gas extraction spontaneous combustion in a coal bed gob region. The simulation experiment device comprises two side wall channels and a U-shaped channel connected between the two side wall channels and composed of a bottom channel, one side wall channel forms an air inlet roadway, the other side wall channel forms an air return roadway, an inner hole of the bottom channel forms the gob region, coal storage sandwiched layers used for placing coal briquettes are arranged on the channel walls of the top and the bottom of the U-shaped channel, ventilating holes are formed in the walls of the sides, close to the inner cavity of the U-shaped channel, of the coal storage sandwiched layers, and multiple layers of coal storage plates usedfor placing the coal briquettes are arranged at intervals on the lateral channel walls of the U-shaped channel in the vertical direction. The simulation experiment device solves the problem that in the prior art, the coal briquettes are only placed at the bottom of the gob region, and since the number of the coal briquettes and the number of coal briquettes in a real extraction construction are large in difference, spontaneous combustion can not be formed.

Description

technical field [0001] The invention relates to a spontaneous combustion simulation experiment device for gas drainage in goafs of coal seams in the field of coal seam mining. Background technique [0002] In the process of coal seam mining, gas will flow out of coal and rock. 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 for gas control is gas drainage, which includes gas drainage in goafs. However, some coal mines are carrying out gas drainage in goafs to control the gas over-limit problem in the upper corner and are accompanied by spontaneous combustion of coal. Dangerous, the spontaneous combustion of coal is because the coal is oxidized after contact with the air, and the oxidation releases heat. When the heat reaches a certain value, the coal will spontaneously combust. [0003] If the negative pressure of gas drainage is too small, ther...

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Problems solved by technology

[0005] The purpose of the present invention is to provide a kind of spontaneous combustion simulation experiment device for gas drainage in coal seam goaf, to solve the problem that in the prior art, coal blocks are only placed at the bottom of the goaf, and the number of coal blocks is greatly different from that in real mining construction. spontaneous combustion problem

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