关键词: 节理, 粗糙度, 各向异性, 变异函数, 岩石力学

Abstract: Aiming at the deficiency of conventional characterization on 2D joint roughness, a new characterization method for 3D roughness of rock joint is proposed. Firstly, the 3D model is established by the joint surface point cloud data obtained through optical scanning system; and then a new 3D roughness parameter (VA) based on normal distribution is provided using modified variation function method and finally, the surface roughness of tensile granite joint is analyzed based on the 3D roughness parameter (VA). The research results show that the new method can well describe the surface fluctuation, frequency and the fractal characteristics of joint and it can describe the anisotropy of roughness.

Key words: joint, roughness, anisotropy, variation function, rock mechanics