Analysis of deformation and failure characteristics of surrounding rock of underground workshop based on discrete element
CHU Cun1,2， GUI Huizhong3， ZHAO Xianyu1， HE Yuan1， WANG Tao1
1.State Key Laboratory of Water Resources and Hydropower Engineering Science， Wuhan University， Wuhan 430072， China；2.Technology Center of CCCC Second Harbor Engineering Co.， Ltd.， Wuhan 430040， China；3.Changjiang Soil and Water Conservation Monitoring Centre， Changjiang Water Resources Commission of the Ministry of Water Resources， Wuhan 430010， China
Abstract：In order to study the influence of the structure on the stress adjustment and the surrounding rock deformation and failure during the excavation of the underground powerhouse in the middle initial stress， the underground powerhouse of a pumped storage power station was taken as the research object， with discrete element software 3DEC used to simulate the excavation process. The study shows that when the excavation section is small， the structural surface near the excavation face will block the adjustment of surrounding rock stress and increase stress concentration at the arch foot， mainly leading to stress-dominated failures on the surrounding rock. When the excavation section is enlarged， stress relaxation of surrounding rock is obvious and the controlled failure of the structure plane will gradually dominate. The structural plane opening simulated by 3DEC is the main cause of surrounding rock displacement， and its opening displacement is greatly affected by the excavation in previous periods. The results could provide an important reference for stability analysis and design support of similar steeply dipped rock strata of large span underground projects.
褚 存,桂惠中,赵先宇,何 远,王 涛. 基于离散元地下厂房围岩变形破坏特征分析[J]. 华中师范大学学报(自然科学版), 2019, 53(4): 594-600.
CHU Cun,GUI Huizhong,ZHAO Xianyu,HE Yuan,WANG Tao. Analysis of deformation and failure characteristics of surrounding rock of underground workshop based on discrete element. journal1, 2019, 53(4): 594-600.
2019, Vol. 53 
