Abstract
A numerical procedure using crack tensors is one method of analyzing a jointed rock mass. In this study, excavation analyses for a circular cavern, hood type cavern, and a large-scale underground power station cavern are carried out with finite element analysis modeling of the jointed rock mass by crack tensors. The purpose of analyses is to investigate the influence of the joint stiffness ratio (i.e., ratio of normal stiffness to shear stiffness) and the stress dependency of joint stiffness on the stress and deformation around the caverns. The numerical results reveal that the numerical procedure newly taking into account the stress dependency of joint stiffness can be used to predict the deformation of a jointed rock mass more accurately than the conventional method.
