近距离煤层同采覆岩破坏规律研究

刘东煤层西三采区的37102与37202工作面为近距离煤层同采工作面,针对此地质赋存条件,采用岩层钻孔探测仪,实测了近距离煤层同采过程中,不同开采阶段时,覆岩的破坏分布规律,得出首先第一阶段开采上层71煤层时,上覆岩层形成的跨落带高度为5.5m,裂隙带高度为23.8 m;第二阶段71、72煤层全部开采时,上覆岩层形成的...

Research on Destruction Rule of Overlying Strata with Mining in Close Distance Coal Seam

37102 and 37202 working face in third western mining area of Liudong coal seams are the working face of close distance coal seam.According to the geological occurrence condition,uses the rock drilling detector to measure near distance coal seam with mining,finds destruction rule of overlying strata in different mining stages,as a result,the first stage mining the upper coal seam 71,the height of the upper overlying strata caving is 5.5 m,and the height of fractured zone is 23.8 m;the second stage mining coa...