厚煤层综放工作面回撤期间防灭火技术研究

Research on Fire Prevention and Extinguishing Technology During the Withdrawal of Fully Mechanized Caving Face in Thick Coal Seam

阳城煤矿3306综放工作面1^#切眼回撤期间工作面CO浓度超限,可能引起采空区遗煤自燃。从工作面地质构造、漏风状态、设备回撤周期等方面分析了CO浓度超限原因,并根据现场实际情况,采用工作面压注凝胶、施工深部钻孔注低温CO2、漏顶区域充填LFM轻型充填材料等措施,保证了工作面支架的安全撤出。

The CO concentration in 3306 fully mechanized top coal caving face of Yangcheng Coal Mine exceeds the limit during the withdrawal of 1^# cut hole,which may cause the spontaneous combustion of the remaining coal in the goaf.The reasons of CO concentration exceeding the limit are analyzed from the geological structure of the working face,air leakage state,equipment withdrawal period and so on,and according to the actual situation in the field,the working face pressure injection gel,the construction deep drilling hole injection low temperature CO2,the leakage top area filling LFM light filling material and so on are adopted to ensure the safe withdrawal of the working face support.