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用RYL-600岩石剪切流变仪对5组大理岩节理试样进行了3次不同法向应力的剪切试验,并用三维非接触式激光形貌仪Talysurf CLI 2000将每次剪切前后的节理上下表面进行形貌测试,用多个参数来定量描述节理表面的形态特征,并计算了每次扫描测试后这9个参数的值。分析得出:节理经过3次剪切试验,节理表面的最大高度、节理表面高度的算术平均差和高度均方根都呈减小趋势;节理表面高度分布的偏态系数、峰态系数和节理表面的坡度均方根变化不明显,且剪切作用对节理表面轮廓线形状影响较小;节理表面面积展开比呈下降趋势,节理表面的复杂程度降低;节理表面纹理层面比呈增大趋势,节理表面各向异性性质有较小变化,仍保持各向异性的性质。
Three shear tests with different normal stresses were performed on five groups of marble joints using the RYL-600 rock shear rheometer. Talysurf CLI 2000, a three-dimensional non-contact laser profilometer, The upper and lower joints were topographically tested, and the morphological characteristics of the joint surfaces were quantitatively described by multiple parameters. The values of these nine parameters were calculated after each scanning test. The results show that after 3 shear tests, the maximum height of joint surface, the arithmetic mean difference of height of joint surface and the root mean square of height decrease. The skewness coefficient, kurtosis coefficient and joint of the height distribution of joint surface The root mean square of the surface gradient is not obvious, and the shearing effect has little effect on the shape of the joint surface contour line; the joint expansion ratio of the joint surface shows a decreasing trend, the joint surface complexity decreases; the aspect ratio of the joint surface texture increases, The anisotropic nature of the joint surface has small changes, still maintaining the anisotropic nature.