(1. Faculty of Electric Power Engineering，Kunming University of Science and Technology，Kunming，Yunnan 650500，China；
2. Engineering Research Center of Rock and Soil Drilling and Excavation and Protection of Ministry of Education，China
University of Geosciences，Wuhan，Hubei 430074，China；3. PowerChina Chengdu Engineering Corporation Limited，
Chengdu，Sichuan 610072，China；4. School of Architecture and Civil Engineering，Xi?an University of
Science and Technology，Xi?an，Shaanxi 710054，China)
Abstract：Rockburst，collapse，large deformation of shotcrete layers after support，rock cracks and other damage phenomena appeared in the underground caverns of Jinping I，Houziyan and other large hydropower projects during construction. Systematic researches have seldom been performed on the deformation and instability modes of surrounding rock and the controlling measures. Based on the collected geological and design data，the geophysical surveying，the monitored data and the field investigation in underground caverns of Dagangshan，1st stage of Jinping，Houziyan，Guandi and other typical hydropower projects during construction，the failures of surrounding rock are divided into 3 modes：the rock structure controlled and gravity-driven mode；the stress-driven mode and the mixed mode according the controlling factors. The failure modes can also be divided into 16 basic modes according to the main project sites where instability occurs in 5 areas of the caverns. The proposed controlling measures were used in Houziyan project to show their feasibility and effectiveness.
董家兴1，2，徐光黎2，李志鹏2，宋胜武3，张世殊3，肖平西3，张方涛2，申艳军4. 高地应力条件下大型地下洞室群围岩失稳模式分类及调控对策[J]. 岩石力学与工程学报, 2014, 33(11): 2161-2170.
DONG Jiaxing1，2，XU Guangli2，LI Zhipeng2，SONG Shengwu3，ZHANG Shishu3，. CLASSIFICATION OF FAILURE MODES AND CONTROLLING MEASURES FOR SURROUNDING ROCK OF LARGE-SCALE CAVERNS WITH HIGH GEOSTRESS. , 2014, 33(11): 2161-2170.
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2014, Vol. 33 
