以西南地区大型水电工程深部地下洞室为研究对象，利用常规测试、微震监测、理论分析和数值模拟等方法，开展高地应力条件下地下洞室开挖损伤区形成机理、识别方法和围岩变形演化规律及预测预警研究。提出考虑岩体损伤效应的围岩劣化本构关系，建立深部地下洞室多尺度数值模型，基于一系列常规测试和微震监测数据，揭示围岩开挖损伤区变形破坏特征，探讨开挖卸荷作用下围岩损伤区形成过程的微破裂萌生、发育和扩展的孕育演化机制，建立深部地下工程围岩损伤区范围、裂隙演化与施工动态之间的相互关系，实现工程扰动下深部岩体工程开挖损伤区形成机理、影响范围及损伤程度的三维可视化，提出基于模拟和监测的深部岩体工程开挖损伤区多参量识别方法及围岩变形预警系统。研究成果可作为深部地下工程开挖、支护参数设计依据，并最终服务于西南地区深部隧洞、地下洞室群等大型岩体工程，促进我国水电、交通工程技术的提高和快速发展。

The deep underground caverns of large scale hydropower stations in the southwest of China are studied using the incorporated approach consisting of conventional testing, microseismic monitoring, theoretical analysis and numerical simulation. The formation mechanism and identification method of excavation damage zones, and the evolution characteristics and forecasting of surrounding rock mass deformation in deep underground caverns under high geo-stress are conducted. The constitutive relation of surrounding rock mass degradation considering the effects of rock mass damage is proposed. The deformation and failure characteristics of excavation damage zones are analyzed based on the multi-scale numerical models of deep underground caverns and a series of conventional testing and microseismic monitoring data. The evolution mechanism of microcracks (i.e., initiation, propagation and extension) in the processes of surrounding rock mass damage zones subject to excavation-induced unloading are investigated. The correlation among the scope of surrounding rock mass damage zones, cracks evolution and dynamic construction in the deep underground engineering are established. Furthermore, the formation mechanism, influence scope and 3D visualization of damage degree of the excavation damage zones in the deep underground caverns subject to construction disturbance can be realized. The multi-parameter identification method of excavation damage zones and forecasting system of surrounding rock mass deformation in deep underground engineering based on simulation and monitoring are thus put forward. The research results can provide some references for the parameters design of excavation and support in deep underground engineering, and ultimately serve to the large scale rock mass projects such as deep tunnels and underground cavern groups in the southwestern China, aiming to promote the improvement and rapid development of technologies on hydropower and traffic engineering in China.