Abstract: The deformation law of phyllite rock mass under complex stress is complicated,Engineering rock mass has many problems,Study the deformation law of rock mass under complex stress,Provide theoretical basis and technical support for solving related engineering problems.According to the stress distribution and the rock mass mechanical parameters of a mining area,Build underground threedimensional model and numerical analysis model.Designed 6 simulation schemes,Analysis the X、Y、Z axial displacement and stress at each point,It shows that the displacement value of most points is greater than the critical value of deformation，The maximum comprehensive displacement is between 550 m and 600 m,Coinciding with the first fissure in this area.Master the law of rock mass deformation in the mining area,For disasters such as shaft wall cracks and open slope sliding,Formulate the long anchor cable reinforcement,waste rock filling treatment,slope cutting and load reduction management plan,guiding the normal production of mining enterprises.

Key words: phyllite,ground stress,numerical simulation,deformation law