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在计算岩石断裂粗糙表面分维时,为充分考虑利用基于激光扫描的断面高程数据,通过将各数据点连接构成类棱柱平行体或3面平行体直接覆盖粗糙断裂面,根据盒维数直接定义,提出体积覆盖算法。与传统的立方体覆盖法相比,体积覆盖法可以直接利用无须修正激光扫描点数据,避免立方体覆盖法坐标系位置差异导致的计算分维值差异,通过直接计算覆盖平行体体积估算岩石断面分维。进一步比较两类不同的平行体覆盖方法,针对同一粗糙表面,体积覆盖法计算的岩石断面分维均具有较高的精度,很好地克服了其他覆盖法中对覆盖格子形状(全部立方体或全部圆柱体)的统一要求,具有很强的适用性。
In order to fully consider the use of cross-section elevation data based on laser scanning in the calculation of the fractal dimension of the rock fracture rough surface, the data are directly connected to form a rough surface by connecting the data points to form a prismatic parallel body or a three-plane parallel body. , Proposed volume coverage algorithm. Compared with the traditional cube covering method, the volume covering method can directly use the fractal dimension to calculate the fractal dimension value without correcting the laser scanning point data and avoiding the difference of the coordinate system of the cube covering method. The fractal dimension of the rock section can be estimated by directly calculating the volume of the covered parallel body. By comparing two different types of parallel body covering methods, the fractal dimension of rock sections calculated by the volume covering method for the same rough surface has higher accuracy and overcomes the problems that the covering lattice shape (all cubes or all Cylinder) uniform requirements, has strong applicability.