首页 | 本学科首页   官方微博 | 高级检索  
     

基于面-体布尔运算的断层切割矿体三维模型
引用本文:邹艳红,褚慧慧,毛先成.基于面-体布尔运算的断层切割矿体三维模型[J].金属矿山,2019,48(7):153-160.
作者姓名:邹艳红  褚慧慧  毛先成
作者单位:1. 有色金属成矿预测与地质环境监测教育部重点实验室,湖南 长沙 410083;2. 中南大学地球科学与信息物理学院,湖南 长沙 410083
基金项目:基金项目:“十三五”国家重点研发计划项目(编号:2017YFC0601503),国家自然科学基金项目(编号:41872249,41472302)。
摘    要:针对矿体被断层面切割的地质现象,目前三维地质体建模往往是通过相邻地质剖面上的地质体轮廓线按三角网直线方式连接实现,断层面切割矿体的空间形态关系难以正确反映在三维可视化模型中。基于三角网格模型,提出了一种断层面切割矿体三维模型的面-体布尔运算算法。首先对矿体和切割矿体的断层面三角网格进行检测,构建拓扑关系;然后基于相交测试求得交线环;最后提取结果域多边形并进行三角剖分。针对断层面切割矿体形态进行了定量研究,分别定义了“获取断层面上的矿体”和“获取断层面下的矿体”两种切割算子,通过切割组合得到最终的切割结果,该算法避免了传统布尔运算中交线跟踪连接成环和点与多边形的包含测试等运算量较大的操作。以贵州省水银洞金矿床为例,结合地质解译和三维地质建模方法,采用该算法对矿床中与断层相交的矿体进行了切割运算。研究表明:基于布尔运算的断层切割矿体三维模型能够正确反映矿体与断层面之间的吻合关系,为研究断裂与矿化分布之间的定量关系提供了可靠依据。

关 键 词:三维地质建模  布尔运算  三角网格  复杂矿体  切割运算  

Fault-cut 3D Ore-body Model Based on Surface-solid Boolean Operations
ZOU Yan-Hong,CHU Hui-Hui,MAO Xian-Cheng.Fault-cut 3D Ore-body Model Based on Surface-solid Boolean Operations[J].Metal Mine,2019,48(7):153-160.
Authors:ZOU Yan-Hong  CHU Hui-Hui  MAO Xian-Cheng
Affiliation:1. Key Laboratory of Metallogenic Prediction of Nonferrous Metals and Geological Environment Monitoring, Ministry of Education,Changsha 410083,China;2. School of Geosciences and Info-Physics,Central South University, Changsha 410083,China
Abstract:For the geological phenomena that a fault cut through ore-bodies,three-dimensional (3D) geological modeling is usually performed by connecting the outlines on adjacent geological sections with triangular mesh in a straight line in the current,and it is difficult to reflect the spatial morphological relationship of the fault-cut ore-bodies in the 3D visualization model correctly.A surface-solid Boolean algorithm based on the triangular mesh model is proposed.Firstly,the triangle mesh models for the fault-cut ore-bodies are detected,and the topological relationship between the fault plane and the ore-bodies is built;then,the intersection loops are obtained based on the intersection test;finally,the result domain polygon is extracted and triangulated.For the morphological quantitative study of the ore-bodies cut by a fault,two cutting operators named “acquiring the ore-body on the fault plane” and “acquiring the ore-body under the fault plane” are defined respectively,and the final cutting results are acquired by the two operators.The algorithm avoided the operations of tracing intersection lines into loops and inclusion tests between points and polygons in the traditional Boolean operations.Taking Shuiyindong gold deposit in Guizhou Province as the study example,combined with geological interpretation and 3D geological modeling technique,the algorithm proposed in this paper is used to cut the ore-body intersecting with the fault in the deposit. The study results show that the 3D model cutting operating based on Boolean operations can reflect the anastomosis relationship between the ore-body and fault correctly,the reliable reference for the study of quantitative relationship between fault and mineralization distribution is provided.
Keywords:
本文献已被 CNKI 等数据库收录!
点击此处可从《金属矿山》浏览原始摘要信息
点击此处可从《金属矿山》下载全文
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号