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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摘要岩体结构面的优势产状和几何信息是评价岩体结构面发育的重要指标，而传统的罗盘测量方法往往无法测量高陡边坡和危险边坡，且无法精确获取岩体结构面几何信息等。三维激光测量技术可以远距离获取裸露岩体坡面的高精度三维激光点云数据，进而可获取结构面的几何信息和实现全自动模糊群聚统计分析。对高精度激光点云数据进行三角网重构，计算重构的三角网平面方程的法向向量及产状，利用模糊C平均群聚方法对结构面产状进行群聚分类，并采用不同颜色表示结构面的群聚分类结果。在此基础上应用IDL语言编制基于海量激光点云数据的岩体结构面自动统计分析软件FSS，将该方法应用于怀柔桥梓镇一裸露岩石边坡结构面优势产状的统计分析中，统计结果表明，该方法具有快速和远距离测量的优点，且结构面群聚分类结果可靠、合理。

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关键词 ：岩石力学, 三维激光扫描, 岩体结构面, 激光点云, 坐标转换, 模糊群聚

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

收稿日期: 2010-08-11

引用本文:

刘昌军，丁留谦，孙东亚. 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[J]. 岩石力学与工程学报, 2011, 30(2): 358-364.
LIU Changjun，DING Liuqian，SUN Dongya. AUTOMATIC FUZZY CLUSTERING ANALYSIS AND GEOMETRIC INFORMATION ACQUISITION OF ROCK MASS DISCONTINUITIES BASED ON LASER POINT CLOUD DATA. , 2011, 30(2): 358-364.

链接本文:

http://www.rockmech.org/CN/Y2011/V30/I2/358

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