FRACTURE MODELS AND STRENGTH BEHAVIOR OF JOINTED ROCK MASS IN COMPRESSION
Li Xinping1， Liu Jinhuan1，2， Peng Yuanping1，2， Peng Xinhui2， Song Guihong1
(1Inst. of Rock-Soil and Environment Engng.，Wuhan University of Technology， Wuhan 430070 China) (2China Gezhouba Group Corporation， Yichang 443002 China)
Abstract：The crack fracture models are developed to analyze and investigate the failure of jointed rock mass. In axial or low confining pressure，the sliding crack of rock mass is described as the extension growth of the curved wing cracks. These wing cracks will propagate stablly. In this case，the peak failure of jointed rock mass may be analyzed and determined by using the fracture model with axially aligned sliding cracks. It is found that confining pressure exhibits the extension growth of the wing cracks very sensitively. With the increase of confining pressure，the brittle failure mode of jointed rock mass in tension fracture may be translated to the ductile failure mode in shear fracture and the peak failure strength is corresponding to the unstable fracture of shear cracks.
李新平1 刘金焕2 彭元平1，2 彭新辉2 宋桂红1. 压应力作用下裂隙岩体的断裂模式与强度特性[J]. 岩石力学与工程学报, 2002, 21(S): 1942-1945.
Li Xinping1， Liu Jinhuan1，2， Peng Yuanping1，2， Peng Xinhui2， Song Guihong1. FRACTURE MODELS AND STRENGTH BEHAVIOR OF JOINTED ROCK MASS IN COMPRESSION. , 2002, 21(S): 1942-1945.
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2002, Vol. 21 
