文章对煤层群开采的覆岩离层注浆层位、钻孔位置及注浆钻孔结构的确定 ,注浆系统的建立 ,地表沉陷监测等进行了全面的论述 ,分析了注浆减沉效果 This paper comprehensively discusses the layer separation, the location of the borehole and the structure of the grouting hole, the establishment of the grouting system and the monitoring of the surface subsidence in the mining of the coal seam group, and analyzes the effect of grouting sinking