In the process of tunnel excavation,the groundwater seepage has greater impact on the stability of wall rock.According to the circumstances of the high cliff tunnel in highway from Luoyang to Luanchuan,the paper applied the finite difference software FLAC3D,established the three-dimensional model,researched the displacement of wall rock when considered the seepage or not considered the seepage,and compared with the value of field monitoring data.Analyzed the stability of surrounding wall rock by using the r...