复杂矿体的块段模型建模算法  

Robust creation of block model from complex orebody model

作　　者：荆永滨[1,2] 王李管[1,2] 毕林[1] 陈建宏[1] 

机构地区：[1]中南大学资源与安全工程学院,湖南长沙410083 [2]中南大学数字矿山研究中心,湖南长沙410083

出　　处：《华中科技大学学报（自然科学版）》2010年第2期97-100,共4页Journal of Huazhong University of Science and Technology(Natural Science Edition)

基　　金：国家自然科学基金资助项目(50774092)

摘　　要：为实现复杂矿体表面模型至块段模型的转换,提出采用8叉树结构存储块段模型,使用有向包围盒(OBB)进行单元块与表面模型的相交检测.对于判断点在多面体内的算法进行比较,对Feito-Torres方法进行改进以更加准确地模拟复杂矿体形状.实验证明,该方法能够准确地从各种具有面片重复、相交和开口的表面模型建立复杂矿体的块段模型,减小数据量,对于输入的表面模型数据容错能力强,并且具有健壮性.To convert the polyhedral model of complex orebody to block model,an octree was used as data structure of block model and an OBB（oriented bounding box） was employed to implement intersection test of block and polyhedral model.Algorithms for point inclusion test in polyhedral model were compared and the Feito-Torres algorithm was improved to represent the complex orebody more accurately.The results show that this approach can create block model of complex orebody accurately from polyhedral model even if there exists duplicate faces,intersections and opens.Moreover,it can reduce the amount of data,has high fault tolerant capability for polyhedral model and it is robust.

关 键 词：矿体 块段模型 储量估算 8叉树 有向包围盒树 包含检测 

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]