Abstract：In view of the roof crack and fracture zone development in water conducting layer in the mining process of Yungang Mine, the numerical simulation model of 51041 working face in 410 panel of the mine is established to determine the standard of roof crack safety zoning. Through the analysis, it is concluded that the west first panel and north second panel of the mine field are the danger zone of coal seam roof crack, and the coal seam may be threatened by aquifer sudden water accident; the south of the mine field is relatively safe, and the possibility of sudden water accident is small.
