Dynamic stress adjustment and rock damage during blasting excavation in a deep-buried circular tunnel

Blasting excavation of deep-buried tunnels is a typical dynamic process subjected to the combined effects of in-situ stress redistribution and blast loading. However, many theoretical and numerical studies associated with excavation-induced rock damage tend to focus on the final static stress distribution after excavation. Whereas the instantaneous stress change during the excavation receives much less attention. In this study, a theoretical...