Evolution Pattern and Matching Mode of Precursor Information about Water Inrush in a Karst Tunnel

The water inrush of the Shangjiawan karst tunnel is used to study evolution pattern precursor information in water-filled caves and further reveal matching mode information. three-dimensional numerical method FLAC3D was simulate process after damage a water-blocking rock mass structure cave obtain water-inrush caused by damage. results show that multifield response characteristic fracture follows order stress-field displacement-field seepage-field. Further, shows stress field increased first then decreased, displacement always increased, seepage decreased.