Abstract: In view of mining under the influence of the space distribution features of overburden rock fracture of mine water inrush disaster prevention and control and gas extraction is of great significance, in the concrete engineering background of pan coal mine 18111 working face, the similar physical simulation, numerical simulation and theory analysis of the three methods, studied the distribution of strata cranny of fully mechanized working face evolution regularity and conductivity fracture height.The results show that, with the continuous advance of the working face, there are fracture accumulation zones at both ends of the working face.Based on the statistical analysis of fracture development Angle by numerical simulation and the results of similar simulation tests, it is concluded that the fracture development Angle of overlying rock presents the characteristics of regional distribution.A variety of methods were used to study the height of fracture development. Through a comprehensive analysis of the obtained results, it was concluded that the height of water-conducting fracture development was 54~60.8m.The results can be used for reference in the study of fracture evolution characteristics under similar engineering conditions.