確矿集团公司南山煤矿是一座设计生产能力300万t的大型矿井,采用竖井集中石门、分区石门和上下山开拓方式。主采15层和18层煤,埋深在500 m以下,有冲击地压显现。掘进三区施工的西二区18层三分段下块综放面底板层回风道,因埋深在500m左右,处于应力集中带,在 Indeed, Nanshan Coal Mine Company is a design and production capacity of 3 million t of large-scale mines, the shaft concentrates Shimen, Shimen and up and down the mountain to open up ways. The main mining 15 and 18 layers of coal, buried at 500 m below the impact of pressure appears. Tunneling three districts construction of the West Second District 18 three-block sub-block caving layer back air duct, due to the depth of about 500m, in the stress concentration zone, in the