Publication details

Strength anisotropy of joints and faults



Year of publication 2018
Type Article in Periodical
Magazine / Source Geology, Geophysics & Enviroment
Keywords strength anisotropy, joint, fault
Description Joints and faults are the most common brittle structures, which disrupt the continuity of the rocks. This lower rocks cohesion has its origin in less strength of joint or fault surfaces in comparison to unfractured rock. Joints are usually considered to be isotropic but this point of view may be used only in the first approximation, but it is very simplified in fact. We tried to testify and quantified idea of shear strength anisotropy of such real fractures and comparised with two types of manmade ideal rupture models from gypsum. Result of testing indicates some unknown strength behavior of striated planes. It is evident, that shear strength of real and gypsum ruptures is anisotropic. Very important factor is the surface roughness. Absolute shear strength is affected by stria size (bigger strias – smaller extremes) and anisotropy of ideal rupture ,odels and real faults works similar way.

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