关键词: 高瓦斯矿井, 综放工作面, 采空区瓦斯抽采, U型通风, CFD模拟

Abstract: In order to solve the problemthat the gas in the upper corner of the mining face of the U ventilation modewas easy to exceed the limit in the high gassy mine,based on the research method of numerical simulation and field test, the effect ofthree-dimensional gas drainage measures in gob on gas control in the upper corner of the mining face was studied. Taking 4312 fully mechanized mining face inChengzhuangcoal mine of Shanxi Jincheng Anthracite Mining Group Co., Ltdasthe research object,high performance gas extraction measures were selected through numerical simulation, and the three-dimensional gas extraction system of “high position bores+extraction pipe buriedin the link roadway of gob”in gob was established.In the numerical simulation of the system, the maximum value of gas concentrationin the upper corner of the mining face decreased to 0.42% numerical simulation. In the field application of the system, the value of gas concentrationin the upper corner of the mining facewas between 0.30 and 0.45%.The field application effect verified the correctness of the numerical simulation results. The research results showed that the three-dimensional efficient gas extraction system could solve the problemthat the gas in the upper corner of the mining face of the U ventilation method was easy to exceed the limit in the high gassy mine.