基于激光点云数据的岩体结构面全自动模糊群聚分析及几何信息获取

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Abstract The dominant occurrence and geometric information of rock mass discontinuities are the important indices to evaluate the development of rock mass discontinuities. Discontinuity information of high and steep slope or unstable slope is unavailable using the traditional compass measurement，therefore the geometric information of rock mass discontinuities cannot be obtained accurately. The technology of three-dimensional(3D) laser measurement can help to obtain 3D point cloud data with high precision of rock mass discontinuities at long distance location；then the geometric information of rock discontinuities can be obtained and the automatic fuzzy clustering statistical analysis is realized. With triangular mesh reconstruction of 3D laser point cloud data，normal vector and occurrence of plane equation of reconstructed triangular mesh are calculated；the occurrence of rock discontinuities is classified by fuzzy C-mean clustering method and the clustering classification results of discontinuity are shown with different colors. The automatic statistical analysis software FSS is programmed with interactive data language(IDL) based on mass laser point cloud data of rock mass discontinuity. The method is adopted to statistically analyze the dominant occurrence of naked rock mass slope discontinuity in Qiaoxin Town of Huairou County；and the results show that the proposed method has the advantages of rapidness and long-distance measurement with reliable and reasonable results of clustering classification.

Key words： rock mechanics three-dimensional(3D) laser scanning rock mass discontinuity laser point cloud coordinate transformation fuzzy clustering

Received: 11 August 2010

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https://rockmech.whrsm.ac.cn/EN/Y2011/V30/I2/358

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