Rockburst was one of the main geological hazards during deep-lying rocky tunnel construction in high crustal stress zone.Rockburst greatly threatened the production safety of the construction enterprises.It was of great im- portance to predict the extent of rockburst in designing and constructing this kind of tunnel.Based on the condition of rockburst and real examples of tunnel engineering,a neutral net work model realized by Visual C++6.0 was derived for predicting the risk of reckburst.This model was app...