八叉树矿体块状模型及其在三道庄露天矿的应用  

The Octree Ore Body Block Model and its Application in Sandaozhuang Open Pit

作　　者：张影[1] 杨春 李发本 

机构地区：[1]西安建筑科技大学 [2]云南省计算机软件开发技术研究中心 [3]洛阳栾川钼业集团公司

出　　处：《金属矿山》2011年第4期45-49,共5页Metal Mine

基　　金：陕西省科技攻关计划项目(编号:2009K08-25);陕西省教育厅专项项目(编号:09JK529)

摘　　要：矿体块状模型广泛应用于品位、储量计算,也可用于露天矿最终开采境界优化和开采计划优化。在研究了八叉树存储结构和基于分离轴的OBB相交测试理论的基础上,提出首先应用八叉树对矿体三维空间进行块状划分,将矿体用一系列的小单元块来逼近,然后利用OBB理论检测单元块与矿体边界的空间关系,对相交单元块进行细分,利用点在多面体内外判断确保块状模型约束在表面模型内,从而以最佳状态逼近矿体边界。最后运用该方法建立了三道庄露天矿矿体块状模型。该方法快速有效,能够满足矿山生产设计需求。The ore-body block model is not only widely used in ore grade and reserve calculation,but used in the optimization of the final mining boundary and mining plan in the open pit.According to the investigation on octree storage structure and OBB intersection test theory based on the separating axis,it is proposed that the three dimensional space of ore body is firstly subdivided into small blocks by the octree,and the ore-body is approximated by a series of small unit blocks;Then,the spatial relationship between unit blocks and the ore boundary is detected by the OBB theory to subdivide the unit blocks of intersection.According to judgment of the point in the polyhedron or not to ensure block model constrained in the surface model,ore-body boundary can be fully approximated.Finally the ore body block model of Sandaozhuang open pit is created by this method,showing it an effective method which can meet needs of production design for the mine.

关 键 词：八叉树 块状模型 相交测试 

分 类 号：TP391.41[自动化与计算机技术—计算机应用技术]