NONLINEAR ANALYSIS OF MECHANISM FOR MULTI-HOLE ROCK SELF SUPPORTING STRUCTURE SYSTEM
孔群支护－自承围岩结构体系的非线性机理分析

The rock self support structure system is formed by multi-holes. The feasibility and efficiency of the support system are described in this paper. The system is modelled with photoelasticity experiment. Then the elastoplastic boundary element method is used to an- alyze this self support system. The research result shows that the destressing technique of boreholes makes the peek stress (plastic zone) shift from the gallery wall into the internal rock so that the self supporting structure system is formed.