Authors Base on elastic-plastic wall rock of theory, apply ANSYS FEM software, and adopt Drucker-Prager rules. FEM numerical simulation is used to analyze different shapes′hole, by means of the analysis of radial displacement and stress, even more distinctly realize the status of wall rock of hole ,to help the architect to confirm hole's shape, and avoid to the bad stability of shape; at the same time to be able to instruct the design of supporting structure.