Abstract: Take the stability of Whitehead Lake iron ore mine Qijiang 12 stages of the roof and floor and pillar as an example，rock mechanical parameters were obtained through uniaxial tensile，uniaxial compression and triaxial compression testsIt can be input as the mechanical parameters of numerical simulationWorking face of the 12 stages was simulated by ANSYS. Stress and strain to determine the most concentrated region，and the distribution of plastic region and monitoring the size and the various points of the changes in vertical displacementIt can improve stress distribution in the process of excavation，and it can also provide a basis for strengthening the region and determine the excavation scheme rationality.

Key words: Iron mine, Stope tunnel, Stability analysis, Numerical simulation