基于三维点云的岩体结构面信息快速化识别方法研究

doi:10.13722/j.cnki.jrme.2020.0747

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摘要岩体中结构面调查和产状分析是开展工程岩体稳定性分析的基础工作之一，为解决传统测线方法获取岩体结构面产状信息存在的效率低、风险高、主观性高和数据共享难等问题，采用MATLAB计算平台，针对复杂岩体表面三维点云数据开展岩体结构面自动识别算法研究，提出基于敏感性参数近邻点数k、夹角阈值j和过滤因子f的结构面识别算法。首先基于邻域寻点方法开展邻域点平面的法向量分析，基于夹角阈值j判断确定属于同组结构面的法向量点集坐标信息，并将共面点云采用相同颜色显示的方式进行再现，并讨论不同类型点云数据的过滤因子f影响，开展优势结构面的最优分组优化分析，实现了优势结构面倾向、倾角产状信息识别、产状投影和结构面玫瑰图快速分析识别，研究成果能够为现场结构面信息的智能化高效测量提供可靠的应用方法。

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	王培涛1
	2
	3
	覃拓3
	黄正均1
	2
	3
	任奋华1
	2
	3
	蔡美峰1
	2
	3

关键词 ：岩石力学, 三维点云, 岩体结构面, 快速识别, 优化分析

Abstract：The in-situ survey and identification of geometric properties of rock discontinuities in jointed rock mass is one of the basic tasks for the stability analysis of rock engineering. In order to solve the problems of the traditional discontinuity survey methods when obtaining the structural plane information，such as low efficiency，high risk，high subjectivity and data sharing difficulty，An automatic identification algorithm of rock mass structural planes，considering three sensitivity parameters including the number of neighbor points k，the angle threshold j and the filter factor f，was proposed based on the three-dimensional point cloud data of rock mass surfaces using MATLAB code. Based on the neighborhood point searching method，the normal vector analysis of the neighborhood point plane was firstly carried out. Then，the coordinate information of the normal vector point set belonging to the same group of structural planes was determined according to the threshold j，and the coplanar point cloud was reproduced in the same color display mode. The optimal groups of structural planes were discussed based on the influence of the filter factor f on varied types of point clouds. Finally，the fast identification and recognition of dip direction and dip angle of dominant discontinuties，occurrence projection and rose diagram were achieved. The research results can provide one reliable application method for the intelligent and efficient measurement of in-site rock discontinuities.

Key words： rock mechanics 3D point cloud rock discontinuities fast identification optimizing analysis

引用本文:

王培涛1，2，3，覃拓3，黄正均1，2，3，任奋华1，2，3，蔡美峰1，2，3. 基于三维点云的岩体结构面信息快速化识别方法研究[J]. 岩石力学与工程学报, 2021, 40(3): 503-519.
WANG Peitao1，2，3，QIN Tuo3，HUANG Zhengjun1，2，3，REN Fenhua1，2，3，CAI Meifeng1，2，3. Fast identification of geometric properties of rock discontinuities based on 3D point cloud. , 2021, 40(3): 503-519.

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http://rockmech.whrsm.ac.cn/CN/10.13722/j.cnki.jrme.2020.0747 或 http://rockmech.whrsm.ac.cn/CN/Y2021/V40/I3/503

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