Deformation failure and energy characteristics of transverse-isotropic rock under unloading of high confining pressure
YANG Yirong1，2，XIE Hongqiang1，2，XIAO Mingli1，2，LIU Jianfeng1，2，HE Jiangda1，2
(1. State Key Laboratory of Hydraulics and Mountain River Engineering，Sichuan University，Chengdu，Sichuan 610065，China；
2. College of Water Resource and Hydropower，Sichuan University，Chengdu，Sichuan 610065，China)
Abstract：The unloading tests on rock samples under different confining pressures were carried out on the system MTS815 to study the deformation and energy characteristics of quartz mica schist with horizontal and vertical foliation respectively. The volume deformation coefficient，the energy ratio，the energy change rate and the energy stress increment ratio were analyzed to investigate the mechanism of energy evolution and deformation failure characteristics of quartz mica schist under the unloading of high confining pressure. The results show that both the radial deformation capacity and the values of characteristic stresses of the sample with the horizontal foliation are higher than those with the vertical foliation. The confining pressure has the obvious influences on the energy evolution of both type of samples. The pre-peak energy stress increment ratios of both groups increase with the initial confining pressure，however the post-peak energy stress increment ratios are almost unaffected by the initial confining pressure.
杨以荣1，2，谢红强1，2，肖明砾1，2，刘建锋1，2，何江达1，2. 高围压卸荷条件下横观各向同性岩体变形破坏与能量特征研究[J]. 岩石力学与工程学报, 2017, 36(8): 1999-2006.
YANG Yirong1，2，XIE Hongqiang1，2，XIAO Mingli1，2，LIU Jianfeng1，2，HE Jiangda1，2. Deformation failure and energy characteristics of transverse-isotropic rock under unloading of high confining pressure. , 2017, 36(8): 1999-2006.
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2017, Vol. 36 
