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断层带开采综放工作面回撤期间CO气体来源复杂,同时受本煤层采空区、邻近层采空区以及断层带裂隙沟通各种漏风通道等CO来源影响,工作面回撤期间防灭火难度大。针对屯宝煤矿I011401工作面回撤期间存在的上述防灭火技术难题,通过对工作面CO来源进行分析论证,采取了持续注氮、三相泡沫注浆以及地面回填堵漏、邻近层采空区密闭处理、邻近层工作面保护性封闭等综合防灭火技术措施,取得了良好的效果。
The gas source of CO gas during the withdrawal of the fully mechanized top coal caving mining face has complex sources and is affected by the source of CO such as the gob of this coal seam, the adjacent goaf, and the fissure communication of fault zone, and the prevention of fire extinguishment during retraction of the working face Big. Aiming at the above fire prevention technology problems during the retraction of I011401 working face in Tunbao Coal Mine, the continuous CO 2 injection, three-phase foam grouting and ground plugging, Airtight treatment, the protective closure of the adjacent face and other integrated fire prevention and control measures, and achieved good results.