摘要
采空区三维空间形态的精确获取关系到矿山安全生产、高效开采和资源有效回收,传统的采空区三维激光等角扫描方法具有扫描盲目性和数据采集分布不均匀性等缺点.结合采空区自身空间几何特点,提出采空区三维激光等距扫描方法,以及基于半球面-平面联合投影的激光扫描点云数据建模算法:采用预扫描采空区若干剖面获取轮廓信息,分析并提取基准轮廓线;在此基础上解析三维激光等距扫描的径向角度和轴向角度控制指令,以此驱动激光扫描仪运作,获取分布均匀的空区点云数据;结合激光扫描点云数据可投影至球面上这一特性,提出了半球面-平面联合投影准则;通过任意轴坐标旋转机制和Delaunay三角剖分原理完成水平面点云数据的构网,最终基于拓扑关系映射实现采空区的快速精确建模.矿山采空区建模的试验结果验证了该探测方法的有效性,为采空区三维空间信息精确获取及建模提供了整体解决方案.
To ensure the secure production,efficient extraction and effective recovery of mining resources,accurate spatial form including size,shape and boundary of the goaf is required.Traditional 3Dlaser equiangular scanning has its disadvantages of scanning blindness and uneven data distribution.With the analysis of the geometric characteristics of mined-area,a 3Dlaser equidistant scanning method and semispherical-planar projection based modeling algorithm were proposed.Firstly,several profiles of goaf were pre-scanned and the fiducial profile was extracted.Secondly,the radial angle and axial angle were solved to control the operation of 3D laser scanner,thus to obtain evenly distributed point cloud data.Thirdly,considering the characteristics that 3Dlaser scanning point cloud data can be projected onto the sphere,semispherical-planar projection rules were presented.Then by the theory of arbitrary axis rotation and Delaunay triangulation,scanning point cloud data was triangulated in the horizontal plane.Finally,3Dgoaf model was built by topotaxy based mapping algorithm.The experimental result of goaf modeling verified the efficiency of the new method which provides an integrated solution for 3Dgoaf scanning and modeling.
出处
《中国矿业大学学报》
EI
CAS
CSCD
北大核心
2016年第4期836-842,共7页
Journal of China University of Mining & Technology
基金
国家高技术研究发展计划(863)项目(2011AA060407)
中南大学中央高校基本科研业务费专项资金项目(2016zzts090)
