In accordance with the characteristics of the extremity stable ore-body above 120 m and the stable ore-body below 120 m, through the simulation of ore/rock by Fast Lagrangian Analysis of Continua (FLAC) model and the back analyzing of rheological parameters of ore/rock, in combination with the comprehensive in-situ monitoring by convergence indicator, acoustic emission device and sonic gauge, the integral condition of ore/rock was evaluated. Based on this, the structural parameters of stope have been optimized.