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芙蓉煤矿上平硐63114采煤工作面采空区于1985年9月出现煤炭自然发火,采用了调节风压法,安全回采完整个工作面煤炭。 一、概况 芙蓉煤矿上平硐是个年产近30 万吨的矿井,平硐开拓边界抽出式通风,高沼气矿井,B组煤有自然发火倾向。63114工作面采B_3煤层,煤厚1.6～2米 ,其上的B_4煤层已经采过。其下的B_2煤层还未布置工作面,属近距离煤层群开采,单一工作面,U型通风。B_3与B_4煤层间距最薄为0.15米,最厚为5米,开采层顶板为粘土岩、泥岩、泥质沙岩。工作面切眼与村办煤矿近邻。 63114采煤工作面回风巷由于矿压大,顶板
Furong Coal Mine Shangdian 63114 Coal Face In the gob of September 1985, spontaneous combustion of coal occurred. The method of regulating wind pressure was adopted to safely recover the coal from the entire working face. I. Introduction Furong coal mine is an adit with an annual output of nearly 300,000 tons of mines, opening up the boundaries of extraction out of ventilation, high-gas mines, B group has a natural tendency to fire. 63114 face mining B_3 coal seam, coal thickness of 1.6 to 2 meters, the B_4 coal seam has been adopted. The B_2 coal seam underneath has not laid face, which belongs to the mining of near distance coal seams, single face, U-shaped ventilation. B_3 and B_4 coal seam spacing of the thinnest of 0.15 meters, the thickest of 5 meters, the top of the mining layer of clay rock, mudstone, shaly sandstone. Working face cut eye and village coal mine neighborhood. 63114 coal face return airway due to mine pressure, roof