针对水体下采煤时覆岩受扰动后可能导致顶板涌水问题,以掌石沟煤矿15102 工作面为研究对象,采用数值模拟、分段封堵测漏与钻孔电视法得到该工作面 15#煤层的导水裂隙带发育高度.对模拟和实测成果分析表明:模拟和现场观测的导水裂隙带高度分别为 49、48.3 m,最终确定导水裂隙带高度为48.3 m,裂采比为 11.78,上界面岩层类型为砂质泥岩,厚度为 4.2 m,距煤层约48 m.
Study on Height of Overlying Rock Water-conducting Zone in Thick Coal Seam Mining
Regarding the issue of roof water inrush caused by disturbance to the overlying rock during coal mining under water bodies,in this paper,the 15102 working face of Zhangshigou coal mine is taken as the research object,and the development height of the water-conducting zone of the 15#coal seam of this working face is obtained by the numerical simulation,segmented plugging and leakage tes-ting and drilling TV method.The simulation analysis and actual measurement results shows that the heights of the water-conducting zone are 49 m and 48.3 m from the simulation and field observation,re-spectively.The final height of the water-conducting zone is 48.3 m,the fracture-mining ratio is 11.78,and the rock layer type at the upper interface is sandy mudstone,with a thickness of 4.2 m and a dis-tance of about 48 m from the coal seam.
万方数据
维普
