ABSTRACT
Based on the fact that surrounding rocks of deep underground openings are generally in broken condition, the numerical method of discontinuous deformation analysis (DDA) is, for the first time, applied to calculating the surrounding rock displacement. The results are well accord with in-situ measured values, which indicates that the calculation method is feasible, and that we can design support parameters for the broken surrounding rocks according to calculated results. It can solve the long-standing problem of lacking effective theoretical method in designing support parameters for deep openings with discontinuous surrounding rocks.
