Abstract: In order to reveal the effect of excavation to surrounding rock deformation, Mengxi coal mine conveying tunnel was simulated by adopt finite difference method, and the three-dimensional model was set up, the figure of plastic zones , displacement and stress distribution of conveying tunnel was obtained by step 1,3,5 analysis. Research results indicated, excavation was one of the influence factors to surrounding rock deformation, provided theoretical basis for theoretical design of supporting scheme and practical application of engineering.

Key words: Excavation, Surrounding rock deformation, Finite difference, Numerical simulation