Abstract: Distribution of seepage field and stress field of orebody and tunnel were analyzed by using thermal analysis module of ANSYS to compare seepage field. The numerical results show that the values of stress field would increase if the effect of seepage field was considered for ores; for the tunnel. The maximum stress regions appeared on the both sides of the tunnel. So the failure of tunnel often occurs in the two shoulders and two bottom corners of the tunnel at the beginning.

Key words: Orebody, Tunnel, Seepage field, Stress field, Finite element analysis