The surrounding rock mass of an underground powerhouse under the three Gorges right bank is one kind of jointed rock mass cut by discontinuous joint. Several kinds of bolts and tendons are used to reinforce surrounding rock mass for reducing the damage evolution zones of joints and confining deformation of the surrounding rock mass. According to the theory of self-consistence and the energy generated in the process of sub-cracks propogation

3D elastic-plastic fracture-damage constitutive model and damage evolution equation are derived. Furthermore

a damage cylindrical element model for calculating anchoring effect is developed .Then these models are used to analyze the stability and optimize the support scheme of the right bank underground powerhouse of the Three Gorges Project. Some beneficial conclusion and advice are obtained that can be used to instruct the construetion.