岩石节理三维粗糙度各向异性表征新方法

针对传统二维节理面粗糙度表征方法的不足,提出一种新的岩石节理面三维粗糙度描述方法。首先,利用光学扫描系统得到节理表面点云数据并建立三维模型;运用改进的变异函数方法,提出一种新的基于正态分布模型参数的三维粗糙度(VA)方法;最后,运用新方法对花岗岩张拉型节理表面的粗糙特性进行分析。结果表明,提出的新方法能够反映节理面的起伏变化、频率和分形特征,并因此能描述出节理粗糙度的各向异性特性。

A new characterization method for three-dimensional roughness anisotropy of rock mass joints

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.