A DESIGN METHOD OF ROCK BOLTS IN JOINTED ROCK MASSES

Abstract

Fully grouted rock bolts are usually used as a support measure for stabilizing tunnels and caverns excavated in jointed rock masses, though the design methods for rock bolts have not been thoroughly developed yet.
In this paper, therefore, a constitutive equation for jointed rock masses reinforced by fully grouted rock bolts is derived on the basis of continuum mechanics, and a design method is proposed by using the derived equation. Case studies for a large cavern are performed to evaluate this design method, and the efficiency of the method is clarified.