Research conclusions:(1)Based on geophysical prospecting，using FLAC to simulate the stress re-distribution after tunnel excavation. It was indicated that the stress distribution and the displacement of tunnel surrounding rock greatly influenced by the fault fracture and anticline positions.(2)Through the analysis of stress and displacement variation， located the DK121+070 and DK121+300 as the stress concentration positions after tunnel excavation，Where Were easy to occur the inflow disaster, and the result of numberical method was matched with the factual water gushing positions. (3)The result in this research proposed a new pattern for the analysis of tunnel water gushing in high-risk paragraph division，and provided the basis to survey and design.