Numerical Simulation of the Influence of Different Dip Angles on Wall Rock and Its Roof and Floor

Taking the dip angle working face of a coal mine in Anhui province as engineering background, the ground pressure distribution laws of wall rock and roof and floor are studied through using the large-scale simulation software of FLAC^3D after coal mining. The research results show that the angle has all important effect on the distribution of the stress and bearing pressure after coal mining, the deformation behavior, destroy characteristics and moving laws of roof in dip angle working face are different with usual working face and the distribution of roof stress is asymmetrical.