干河煤矿2-301工作面底板突水机理及治理技术研究

Study on the mechanism and control technology of floor water outburst in No.2-301 Face of Ganhe Mine

以干河煤矿2-301工作面底板突水事件为研究对象,通过理论分析计算、现场实测、效果验证等研究手段,对突水水源、涌水通道、治理模式进行研究。结果表明,干河煤矿2号煤层开采主要受底板奥灰含水层威胁,2-301工作面底板突水水源为奥灰水,涌水通道为隐伏陷落柱导水,采用盖冒堵源相结合的治理方案,盖帽区域充填系数达到85%以上,奥灰水被有效封堵,取得较好的经济和社会效益,为类似矿井提供参考经验。

Taking the floor water outburst event of No.2-301 Face in Ganhe Mine as the research object,through theoretical analysis and calculation,field measurement,effect verification and other research methods,the water outburst source,water outburst channel and control mode were studied.The results showed that the mining of No.2 coal seam in Ganhe Mine was mainly threatened by the Ordovician limestone aquifer in the floor.The source of water outburst from the floor of the 2-301 working face was Ordovician limestone water,and the water outburst channel was the water conduction of the hidden collapse column.The control scheme of combining the cover and the blocking source was adopted.The filling coefficient of the cap area reached more than 85%,and the Ordovician limestone water was effectively blocked.Good economic and social benefits had been achieved,which provided reference experience for similar mines.