中文摘要：

现场调查表明，岩体经历了复杂的岩浆活动和多期构造作用，白鹤滩坝区左岸主要存在3种变形破坏模式，即正常卸荷型、陡裂夹泥型、缓倾角错动带的表生改造型；对边坡岩体结构特征、岩体风化及物理力学性质等特征进行了细致研究；在此基础上，运用动力离散元数值模拟，揭示了在地震作用下边坡变形破裂发生规律和变形发展模式，对其动力稳定性及可能引起的工程效应进行了综合评价．

英文摘要：

Site investigation shows that the rock mass has experienced a complex magmatic activity and multi-phase tectonic processes. There are mainly three types of deformation and failure modes on the left bank, including normal unloading, intercalated gouge in steep crack, and epigenetic reformation in low- angle dislocation interfaces. The paper reveals the occurrence regularity and development of displacement of such slope through dynamic discrete element numerical simulation in the earthquake, based on the detailed studies of the structure type of slope rock, composition of rock structures, rock weathering and physical and mechanical properties. Finally, the dynamic stability and the possible engineering effects of high slopes are comprehensively evaluated.