机载激光点云矿区微量沉陷信息提取方法研究  

Research on Micro-subsidence Information Extraction Method in Airborne Laser Point Cloud Mining Area

作　　者：王福奇 胡兵 王雁昕 梁戈龙 顾雷雨 王冬[4] 郝娇阳 WANG Fuqi;HU Bing;WANG Yanxin;LIANG Gelong;GU Leiyu;WANG Dong;HAO Jiaoyang(Hetaoyu Coal Mine,Huaneng Qingyang Coal Power Co.,Ltd.,Qingyang 745300,China;Huaneng Coal Technology Research Co.,Ltd.,Beijing 100071,China;Shanxi Huaye Survey Engineering Technology Co.,Ltd.,Taiyuan 030000,China;Shandong University of Science and Technology,Qingdao 266590,China)

机构地区：[1]华能庆阳煤电有限责任公司核桃峪煤矿,甘肃庆阳745300 [2]华能煤炭技术研究有限公司,北京100071 [3]山西华冶勘测工程技术有限公司,太原030000 [4]山东科技大学,山东青岛266590

出　　处：《煤炭技术》2025年第4期112-118,共7页Coal Technology

基　　金：华能集团总部科技项目(HNKJ21-HF42)。

摘　　要：针对机载激光雷达采集的点云数据,因误差来源较为复杂,而导致其在矿区微量沉陷信息提取领域中的应用受到限制的问题,首先,分析了目前机载激光点云提取沉陷信息的通用流程,以及各流程和算法中存在的不足;其次,针对渐进加密三角网滤波算法,在滤除低矮植被中存在的弊端,利用点云的回波强度特性,使用区域生长算法对其进行二次改进,减少了沉陷信息提取过程中的滤波误差,同时,针对各点云插值算法在不同地形下的适应性不同,对比分析了几种常用插值算法,在实验区地形下提取构建差值DEM的表现;最后,采用一维小波变换阈值去噪的方法对沉陷盆地进行处理,提取得到了光滑且较为可靠的沉陷盆地。研究证明了通过机载激光点云提取煤矿开采微量沉陷信息的可行性,所提方法能够大幅提高机载激光点云微量沉陷信息提取的精度。Aiming at the problem that the application of point cloud data collected by airborne laser radar in mining area is limited due to the complexity of error sources,the current general flow of airborne laser point cloud extraction of subsidence information and the shortcomings of each flow and algorithm are analyzed.Secondly,in view of the disadvantages of the filtering algorithm of progressive encryption triangulation network in filtering low vegetation,the regional growth algorithm is used to make a secondary improvement based on the echo intensity characteristics of point cloud,which reduces the filtering error in the process of extraction of settlement information.Meanwhile,in view of the different adaptability of each point cloud interpolation algorithm in different terrains,the performance of several commonly used interpolation algorithms in the extraction and construction of differential DEM under the terrain of the experimental area is compared and analyzed.Finally,the onedimensional wavelet transform threshold denoising method is used to process the subsidence basin,and the smooth and reliable subsidence basin is extracted.The study proves the feasibility of extracting micro-subsidence information of coal mining by airborne laser point cloud,and the proposed method can greatly improve the extraction accuracy of airborne laser point cloud micro-subsidence information.

关 键 词：机载激光点云 微量沉陷信息 渐进加密三角网滤波 区域生长算法 点云插值 一维小波去噪 

分 类 号：TD73[矿业工程—矿井通风与安全] P237[天文地球—摄影测量与遥感]