Abstract: Using UDEC software to simulate and analyze the thick and hard roof condition of Panbei mine 11313 work face mining roof and floor stress distribution and the movement rule of overlying strata，in the working face in mining process, it is concluded that fracture step distance is 55m ~ 60m, in working face roof above 46m range fracture development is vertical fractures,the working face roof above 46m range is fracture zone, The fracture development of 46m ~ 88m above the roof of the working face is basically a layer to crack,the working face roof above 46m ~ 88m range is Bending zone ;The front abutment pressure of the coal pillar and the coal wall in the face of the cut is gradually increased, and when the distance is pushed to a certain distance, the support pressure remains unchanged; for the field of surrounding rock in different layers of abutment pressure peak position: the floor of 7m ＜the floor of 3m ＜ the roof of 9m＜ the roof of 33m.