9号煤层开采两带发育高度井下观测研究

Underground observation and research of the development height of two mining zones of No.9 coal seam

通过在井下施工钻孔进行压水试验,对葛泉矿东井11915工作面9号煤层开采两带发育高度进行观测,分析煤层回采后垮落带、导水裂缝带的高度,获取煤层开采覆岩两带分布特征,为该矿松散含水层下采煤提供理论依据。

The development height of two mining zones of No.9 coal seam in 11915 working face of east shaft of Gequan Mine was observed through water pressure test in underground drilling.The height of caving zone and water conduction fracture zone after coal seam mining was analyzed,and the distribution characteristics of two mining zones of overlying rock were obtained,which provided theoretical basis for coal mining under loose aquifer of the mine.