我国西部地区大型水电工程岩体多处于复杂的地质环境，在高应力和强卸荷作用下表现出现有理论不能解释的新问题。为了研究西部大型水电工程中复杂岩体与高地应力引起的岩体变形破坏机理、岩体松弛特征、岩体流变特性以及破坏时效特性等复杂岩石力学与工程问题，专门研发和引进了几种新的岩体原位试验技术。简要介绍了现场岩体柔性承压板法流变试验技术、复杂应力路径下现场岩体高围压真三轴试验技术、现场坚硬岩体破坏时效三轴流变试验技术、岩体变形破坏声发射定位测试技术等几种新的岩体原位试验技术，以及这些试验技术应用于我国西部大型水电工程复杂岩体力学问题研究所取得的初步研究成果。

In complex geological environments, high geo-stress and strong unloading in particular, the rock mass of large hydropower projects in west China presents new phenomena which cannot be explained by the existing theories. New in-site test techniques were developed and imported to study the complicated problems regarding rock mechanics and rock engineering of large hydropower projects in west China, covering the rock mass deformation and failure mechanism, the characteristics of rock mass relaxation, the rheological behavior and characteristics of time-dependent failure of rock. In-site rock mass test techniques, inclusive of the rheological test with flexible bearing plate, the real-triaxial unloading test under high confining pressure with complicated stress paths, the triaxial rheological test and time  dependent failure of hard rock mass, and acoustic emission location technique for the deformation and failure of rock mass are briefly introduced. Initial achievements of applying these new techniques in studying complicated rock mechanics problems of large hydropower projects in west China were also presented.