Research on the Roughness of Rock Joint by Percentage of Bright Area
To simplify the calculation process of shear strength,the three-dimensional roughness of joint is calculated by the percentage of bright area(BAP).This method takes the natural slate joint surface as the research object,the surface topographic areas with large fluctuations are selected,and the point cloud data of four different groups of sampling objects are extracted.By reproducing the original roughness extraction method of Surfer and Matlab to calculate the BAP value.The results show that different sampling methods lead to certain differences in anisotropy analysis results,and the accuracy and implementation efficiency obtained are both low.Aiming at the differences in grayscale analysis when using this method in different software,an integrated BAP optimization analysis method based on Matlab is proposed.Further comparing the light source simulation results under the function conditions of Shaderel configured in Matlab and Surfer,it is found that the former grayscale image is clearer.Calculate the BAP value under the condition of light source,combine the formula to quantitatively evaluate the three-dimensional roughness JRC3D value,and compare and analyze the anisotropic statistical features of JRC3D and θmax/(C+1)values with four sample shapes.Is of great significance to the evaluation of slope stability.
万方数据
维普
