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针对某矿难抽采煤层综放采空区遗煤自燃问题,通过分析现场自然发火特征与危险性,制定出5-2S-2综放工作面采空区遗煤自燃综合防治技术,并应用于生产现场。实践表明,实施以采空区注氮为主,降低供风量、加快工作面推进速度、埋管灌浆、砌筑隔离墙等措施为辅的综合防灭火技术,有效防治了采空区遗煤自燃,保障了工作面的安全回采。
Aiming at the problem of coal spontaneous combustion of goaf in a fully mechanized sublevel caving face of a fully mechanized caving-prone coal mine, a comprehensive prevention and control technology of coal spontaneous combustion in goaf of 5-2S-2 fully mechanized caving mining face was developed by analyzing the characteristics and risks of spontaneous combustion in the site. At the production site. The practice shows that the integrated fire prevention technology supplemented by such measures as injecting nitrogen in the goaf, reducing the air supply, accelerating the advancing speed of the working face, pipe grouting and masonry barrier is effective in preventing and controlling the spontaneous combustion of coal in the goaf, , To ensure the safe mining face.