Abstract：Research purposes:The analysis of tunnel water gushing usually does not consider the effect of tunnel excavation on the stress distribution and balance. Stress concentration sections usually produces a lot of fractures，which are the major channel of ground water transportation，and water gushing easy to happen in there. Using numerical method to simulate the stress variation after tunnel excavation，to locate new stress concentration as a new water gushing point and compared with the measured data after tunnel excavation，and to guide the survey and design of tunnel water gushing.
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.
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2015, Vol. 32 
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