关闭煤矿高位采空积水综合治理技术研究与应用——以小溪沟煤矿为例

Research and application of comprehensive treatment technology for high-level goaf water accumulation in closed coal mine

针对小溪沟煤矿东翼受相邻关闭煤矿高位采空积水威胁,且关闭煤矿开采技术资料不准的问题,采用地面瞬变电磁法核查了关闭煤矿采空积水情况,对积水影响区防隔水煤柱进行了重新设计,提出通过施工专用放水巷和放水钻孔疏排关闭煤矿采空积水的水害治理技术方案。治水工程实施后,相邻关闭煤矿高位采空积水被完全疏干,东翼积水影响区资源得以安全回采,水灾防控成本仅为7.8元/t,经济效益显著。

In response to the threat of high-level goaf water accumulation in adjacent closed coal mines on the east wing of Xiaoxigou Coal Mine,and the inaccurate technical data of closed coal mine mining,the ground transient electromagnetic method was used to verify the goaf water accumulation situation in the closed coal mine.The waterproof coal pillar in the affected area of water accumulation was redesigned,and a water hazard control technology plan was proposed to drain the goaf water accumulation in the closed coal mine through constructing dedicated drainage roadway and drainage boreholes.After the implementation of the water control project,the high-level goaf water in adjacent closed coal mines was completely drained,and the coal resources in the east wing affected by the water accumulation were safely recovered.The cost of water hazard prevention and control was only 7.8 yuan per ton of coal,and the economic benefits were significant.