封闭水文地质单元条件下工作面顶板水害治理实践

Treatment method and practice of roof water disaster in working face under the condition of closed hydrogeological unit

新疆哈密大南湖五号矿井18煤顶板以上约20 m处赋存Ⅲ-1含水层,该含水层孔隙、裂隙发育,孔隙度高,渗透性能好,地下水储量丰富,因区域水文地质单元相对封闭,以净储量为主且量大,成为工作面回采时的首要威胁。为满足哈密大南湖五号井1803工作面安全回采要求,提出“疏、排”的综合治理思路,重点实施了工作面顶板Ⅲ-1下段含水层疏放方案及其他防治水辅助与保障等治理技术。通过对1803工作面水害隐患及治理过程进行分析,验证了封闭水文地质单元条件下工作面顶板水害治理方法的可行性。

There is aⅢ-1 aquifer about 20 m above the roof of coal seam 18 of Dananhu No.5 Mine in Hami,Xinjiang.The aquifer has developed pores and fissures,high porosity,good permeability and rich groundwater reserves.Due to the relative closure of regional hydrogeological units,it is dominated by net reserves and has a large amount,which has become the primary threat to the mining of the working face.In order to meet the safety mining requirements of 1803 working face of well Dananhu No.5 Mine in Hami,the comprehensive treatment idea of"exploration,prevention,drainage,monitoring and control"was put forward,and the drainage scheme of aquifer in the lower section of roofⅢ-1 of working face and other treatment technologies,such as water control assistance and guarantee,were mainly implemented.Through the analysis of water hazard and treatment process of 1803 working face,the feasibility of roof water hazard treatment method under the condition of closed hydrogeological unit was verified.