中国矿山工程

In this paper, Daqiao Gou coal mining group as the research background, through the analysis of the mine roof lithology, the engineering geological conditions of No.9, No.10 and No.11 coal seams in the middle group are poor to medium, the roof caving is good. The corresponding safety management measures of working face mining are put forward to provide reference for the safety mining of the same type of mine.