防突技术在新义煤矿石门揭煤中的应用

Application of Coal and Gas Outburst Prevention Technology in Cross-cut Uncovering Coal of Xinyi Coal Mine

结合新义煤矿的瓦斯地质条件和矿井开拓开采方式,详细分析了新义煤矿石门揭煤工作面突出危险性预测D、K综合指标法和钻屑瓦斯解吸指标法。根据突出危险性预测结果,采取了卸压排放钻孔防突、预抽煤层瓦斯和水力冲孔措施。

Combined with gassy geological conditions and coal shaft exploration method of Xinyi Coal Mine,the D and K comprehensive index method and desorption index of drill-cuttings method were analyzed in detail to forecast the outburst danger of cross-cut coal uncovering working face.Based on risk forecast results of gas outburst,corresponding protection measures against outburst were adopted,including pressure-released（drainage）borehole,gas pre-drainage and hydraulic flushing borehole,etc.