Abstract
Rock failure at tunnel face during construction of mountain tunnels is recognized as a geological hazard. To mitigate this risk, a shotcrete of thickness 3~5cm is sprayed on the rock surface. However, there are cases where rock failure occurs even when the recommended shotcrete thickness is applied. This implies that various factors are thought to contribute to rock failure. This study uses logistics regression to explore the relationship between five rock properties and their influence on rock failure occurrence. The five parameters are weathering, crack interval, crack density, rock fracture energy, and shotcrete thickness. Moreover, the same model is applied to explore this relationship in different geological strata.
https://ror.org/048gksa87 
