Abstract：In the process of large section tunnel driving,in order to detect the geological conditions and surrounding rock characteristics,seismic wave CT and reflection wave exploration in the tunnel are often used.Using the numerical simulation technology of seismic wave,seismic wave CT was carried out in the advancing hole of tunnel and reflection seismic exploration.Based on cross hole seismic wave CT results of velocity inversion and reflection seismic migration imaging results of data fusion,the failure characteristics of surrounding rock and advance geological prediction were judged.Numerical simulation experiments show that the method can improve the accuracy of the geological prediction of the tunnel surrounding.The cross hole seismic wave CT results provides a new parameter for the large section tunnel geological prediction.The result of data fusion can provide parameters for safety technical measures,which is very important for safe driving.

Keyword：cross hole seismic wave CT;reflection seismic exploration;data fusion;large section tunnel;rounding rock failure characteristics;advanced geological prediction;