根据Ｂｅｔｉ能量互易定理、修正自洽法理论和节理裂隙断裂扩展过程中的能量转换与能量耗散建立了岩体的能量损伤演化方程，在此基础上通过有效应力体现损伤与塑性变形的耦合效应，建立了裂隙岩体的三维脆弹塑性断裂损伤本构模型，并将该模型应用于三峡船闸高边坡，进行了边坡节理岩体开挖卸荷稳定三维非线性有限元计算，获得了一些具有工程指导意义的结论和建议 According to Beti’s energy reciprocity theorem, the self-consistent theory and energy transfer and energy dissipation in the process of fracture-fracture expansion are modified to establish the energy damage evolution equations of rock mass. Based on this, the effective stress is used to reflect the coupling between damage and plastic deformation Effect, the constitutive model of three-dimensional brittle-elastic-plastic failure of fractured rock mass is established. The model is applied to the high slope of Ship Lock in the Three Gorges Reservoir. The three-dimensional nonlinear finite element method is used to calculate the unloading stability of slope rock mass. Some conclusions and recommendations with engineering guidance