ABSTRACT
We carried out the experimental study in order to investigate the influence of the surface roughness of rock joints on the shear strength of those. We made some artificial plaster specimens which have three different types of surface profiles, i.e. regular triangular profile, irregular triangular profile and JRC profiles. All of these specimens are applied on the direct shear test. On the other hand, before direct shear test, in order to investigate the method of quantitative estimation of irregular joint profile, the measurement and the analysis of joint profile for each specimen using laser profilometer have conducted.
As the results, we proposed the shear strength criteria which is expressed by the power function, and it is recognized that this criteria is applied to various rock joints.
