复杂矿床三维可视化建模关键技术  

Key techniques for 3D visual modeling of complex mineral deposits

作　　者：荆永滨[1] 刘晓明[2] 毕林[2] 

机构地区：[1]河南工程学院安全工程学院,河南郑州451191 [2]中南大学资源与安全工程学院,湖南长沙410083

出　　处：《中南大学学报（自然科学版）》2014年第9期3104-3110,共7页Journal of Central South University:Science and Technology

基　　金：河南省教育厅科学技术研究重点项目(13B440925);中国博士后科学基金资助项目(2012M511417)

摘　　要：为实现复杂矿床空间形态和矿石品位分布的三维表达,构建真实的矿床三维地质环境,研究复杂矿床建模与可视化系统构建的关键技术。采用一些复杂的算法将矿体表面模型和块段模型结合成一种混合模型方案,包括从原始地勘数据建立钻孔三维模型;轮廓线贴面重构矿床三维表面模型;通过表面模型构建八叉树结构存储的块段模型,构建块段模型时采用方向包围盒(OBB)进行相交检测,用Feito–Torres方法进行包含检测;应用地质统计学方法对块段模型单元块的矿石品位进行估值。通过这些技术能够快速准确地建立复杂矿床表面模型和块段模型,构建三维可视化的采矿地质环境,为矿山提供直观、逼真的开放式基础数据源。To present the spatial shape and grade distribution of complex mineral deposit in 3D space and to establish the real 3D geological environment of complex mineral deposit, the key techniques for building complex deposit modeling and visualization system were discussed. A number of sophisticated algorithms were implemented to integrate the deposit surface model and block model to a new scheme of hybrid model. 3D borehole model was created by multi-source exploration data. A surface model of deposit was reconstructed through tiling method from planar contour lines. Robust conversion method of block model from complex deposit model was proposed. An octree with force subdivision was used as data structure of block model with subdivision blocks on the boundary. OBB collision detection and Feito-Torres algorithm were employed for the intersect test and inclusion test between a block and surface model. Ore grades of cells within block model were estimated by geostatistical techniques. Through the above techniques, the 3D geological environment of complex surface model and block model of complex deposit can be built rapidly and accurately. So as a visual and realistic open data source of mineral deposit for various mining activities is provided.

关 键 词：复杂矿床模型 三维可视化 块段模型 品位估值 

分 类 号：TD672[矿业工程—矿山机电] TP391.72[自动化与计算机技术—计算机应用技术]