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针对张双楼煤矿9421综采工作面倾角大,工作面上方存在7425采空区及7、9煤层合层区,停采时间长等导致的采空区煤自燃严重的难题,结合9421工作面采空区火区特点,采取了注超高水材料封堵技术、三相泡沫防灭火技术及工作面均压通风防灭火技术等综合治理措施,有效封堵漏风通道,抑制了煤自燃氧化升温过程的发展,火风压得到控制,确保了工作面的安全回撤。
In view of the serious problem of spontaneous combustion of coal in goaf 9421 working face in Zhangshuilou Coal Mine with large dip angle, 7425 goaf above working face and coalesced zone in 7,9 coal seam, The characteristics of the fire area of goaf, take the injection of ultra-high water material sealing technology, three-phase foam fire extinguishing technology and face ventilation pressure fire extinguishing technology and other comprehensive measures to effectively block air leakage channel, inhibit spontaneous combustion of coal oxidation The process of development, fire pressure control, to ensure the safety of face retracement.