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

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 bri