针对孟巴矿特厚煤层二分层1210孤岛综放面高地温高湿环境、采空区遗煤多及构造带漏风等复杂条件下开采的特点,分析了煤自燃防治的重点区域,根据生产期间不同时期工作面CO气体的变化情况,综合论证不同防灭火技术的作用效果,采用定期监测、端头封堵后复合胶体隔离、注氮惰化等综合防灭火技术,有效地阻断了煤自燃发展的必要条件,确保了1210孤岛综放面的正常生产和回收。
According to the complex conditions in the second layer of Mengba mine, with high ground temperature, high moisture, large amount of residual coal in goaf, serious air leak and big fault of 1210 fully mechanized island caving workface, the key zones of fire preventing were analyzed. On the basis of CO variation in working face during mining, combining with the applicability of different fire preventing technology, a comprehensive fire control scheme was applied, including regular monitoring, gel injection after ends sealing, nitrogen injection, to interdict the necessary condition of coal spontaneous combustion, and the normal production of 1210 working face was ensured.