DYNAMIC STABILITY EVALUATION FOR ROCK STRUCTURE AROUND UNDERGROUND CAVERN BASED ON FRICTIONAL ENERGY ON JOINTS
WANG Shuai1，SHENG Qian2，ZHU Zeqi2，FU Xiaodong2
(1. Key Laboratory of Geotechnical Mechanics and Engineering of Ministry of Water Resources，Yangtze River Scientific Research Institute，Wuhan，Hubei 430010，China；2. Institute of Rock and Soil Mechanics，Chinese Academy of Sciences， Wuhan，Hubei 430071，China)
Abstract：Due to stability of rock structure is controlled by the joint，frictional energy on joints is proposed as an indicator of stability evaluation for rock structure around underground cavern. Relying on the underground cavern of Dagangshan hydropower station，numerical simulations with discrete element method are performed for different combinations of joint orientation，joint spacing and joint friction angle. Stability of rock structure is checked based on frictional energy and dynamic response of joints respectively. The applicability of friction energy on joints is discussed. Results show that the index proposed can be applied to evaluate the shear destruction of rock structure around underground cavern which can reflect failure rate，failure history and damage size of rock structure；consequent joints with inclination of 60° and consequent joints cutting at lower position of high sidewall are less favorable to the dynamic stability of rock structure.
王 帅1，盛 谦2，朱泽奇2，付晓东2. 基于节理摩擦能的地下洞室岩体结构动力稳定性评价[J]. 岩石力学与工程学报, 2014, 33(S2): 4049-4055.
WANG Shuai1，SHENG Qian2，ZHU Zeqi2，FU Xiaodong2. DYNAMIC STABILITY EVALUATION FOR ROCK STRUCTURE AROUND UNDERGROUND CAVERN BASED ON FRICTIONAL ENERGY ON JOINTS. , 2014, 33(S2): 4049-4055.
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2014, Vol. 33 
