Abstract:The influence of groundwater seepage on underground engineering has always been a concern of people,The fluid-structure coupling analysis was carried out through FLAC3D, and the influence of the existence of underground passage on the seepage law of groundwater and groundwater seepage was investigated,The reaction of the change of flow law to the underground passage is studied, and the influence of underground engineering on the distribution of groundwater seepage law is obtainedIt is found that the change of seepage law has an influence on the distribution range of stress field and the position and value of the maximum stress distribution It"s all changed