Numerical Simulation of Deformation and Fracture Laws for Soft Rock Roadway in Deep Shaft Large Section

By means of FLAC^3D,took a mine as the background,studying the different depths under the conditions of large sections of roadway surrounding rock stress,deformation and rupture law,the paper get the trend of large section roadway characteristics changed into soft rock,and surrounding rock showed very special broken laws when the depth is more than 600 m.the critical depth for softening rock of the mine is 600 m.