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针对W4204综放工作面煤自然发火导致工作面多次被迫封闭的事故,深入剖析了遗煤自然发火的原因、易自燃区域位置和防治难点。在此基础上,重新设计了防灭火工艺巷及钻孔,该综合技术成功运用,消除了封闭工作面火区隐患,保证了工作面的安全启封和剩余设备的安全回撤。
In view of the accident of spontaneous combustion of coal in W4204 fully mechanized top coal caving face that caused the working face to be closed for many times, the reason of natural spontaneous combustion of coal, the location of spontaneous combustion zone and the difficulty of prevention and cure are analyzed thoroughly. On this basis, the fire prevention technology lane and drilling are redesigned. The integrated technology has been successfully applied to eliminate the hidden danger in the fire area of the enclosed working face and ensure the safe unsealing of the working face and the safety retraction of the remaining equipment.