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柴家沟煤矿42105综放面开采煤层具有煤自然发火期短、厚度变化大、顶板来压周期长及推进速度慢的特点,大大的提高了采空区遗煤自燃危险程度,针对煤自燃机理制定了和实施了采空区两道注胶体隔离墙、采空区半封闭式注氮及支架后部遗煤喷洒阻化剂的预防措施,从降低采空区漏风、惰化采空区及降低遗煤的氧化性等方面预防了煤自燃火灾的发生,同时加大了监测力度,有效安全的保证了工作面的推进。
Coal mining in 42105 fully mechanized caving face of Chaijiagou coal mine has the characteristics of short spontaneous combustion period of coal, large thickness variation, long period of roof pressing and slow propulsion speed, which greatly improves the spontaneous combustion danger of coal left in goaf, The preventive measures of semi-enclosed nitrogen injection in the goaf and spray-on of the coal residue in the rear of the scaffold were formulated and implemented. Two measures were taken to reduce the air leakage and inerting gob area. Reduce coal oxidation and other aspects to prevent the occurrence of coal spontaneous combustion, while increasing the monitoring efforts, effective and safe to ensure the advance of the work surface.