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结合白皎煤矿2274工作面掘进及贯通后上覆采空区发生的严重自然发火隐患,分析了隐患产生的原因,确立“灭火+防火”的联合治灾方案,提出了近距离复杂地质构造煤层上覆采空区自然发火综合治理技术。以施工观测钻孔对上覆采空区火灾隐患区域探查为先导,合理划定隐患范围;采取采空区注液态CO_2灭火降温、巷道喷浆堵漏以及注氮惰化等手段,成功处理上覆采空区自然发火隐患的同时,保障工作面安全回采。
Combined with the serious spontaneous fire hazard occurred in the tunnel of 2274 working face of Baijiao Coal Mine, the causes of the hidden danger were analyzed, and the united disaster management plan of “extinguishing fire and fire prevention” was established, and the short distance complex geology Comprehensive Control Technology of Spontaneous Combustion in Overlying Gob of Structural Coal Seam. Taking the construction observation borehole as the guide, the area of hidden danger in the overlying goaf was set as the guide, and the scope of the hidden danger was reasonably defined. With the measures such as extinguishing and cooling the liquid CO 2 in the goaf, the grouting in the roadway and the nitrogen inerting, the successful treatment Cover the gob while natural hazards, while ensuring safe mining face.