Abstract: We proposed an approach to simulate the tunneling process to ensure the safety of the underground-tunnel construction under complicated geological structure and risks of multiple geo-hazards．We first constructed the 3D geologi-cal model from the geological exploration data using intelligent deduction and human-computer interaction approaches．Then we simulated the tunneling process to show the geological structure changes of the tunnel surrounding rock．In this way,we can predict the potential geo-hazards in the tunneling process．This approach has been successfully applied to several rail way tunneling projects．It is proved that it can effectively predict the changes of the surrounding rock,the location,type and magnitude of the geo-hazards．This approach could provide accurate information for tunnel construction.

Key words: Computer simulation,3D geological modeling,Information visualization,Tunnel disaster risk warning,Virtualreality