利用钻孔数据构建无缝三维地层模型  

A Technology for Constructing Seamless 3D Stratum Models Based on Boreholes

作　　者：魏占营[1] 段敏燕[1,2] 李青元[1] 

机构地区：[1]中国测绘科学研究院,北京市莲花池西路28号100830 [2]武汉大学资源与环境科学学院,武汉市珞喻路129号430079

出　　处：《武汉大学学报（信息科学版）》2013年第11期1383-1386,共4页Geomatics and Information Science of Wuhan University

基　　金：国家自然科学基金资助项目(41272367);国家863计划资助项目(2010AA122202)

摘　　要：提出一种"全区厚度法"建立三维地质模型,该方法以原始钻孔分层数据为数据源,按照同一网格间距插值构建各个地层的顶底板DEM,并转换为具有拓扑关系的TIN模型,集合所有地层的尖灭线,加入到各个地层中,这时所有地层的表面模型(TIN)除了顶点Z值以外的顶点数目、顶点坐标及TIN内的拓扑关系等都相同。试验证明,该方法可以构建无缝的三维地层模型,易于表达地层的尖灭、透镜体等特殊地质现象,构建的三维地层模型易于进行剖切分析和构建地层间的拓扑关系。In this paper, a whole-area thickness method was proposed for constructing seam- less 3D stratum models. Using borehole data as the data source, roof and floor DEMs for all stratum were constructed according to the same grid span. Then, the DEMs were trans- formed into a TIN model with topological relationships. All pinch-out lines were assembled and appended to the relevant stratum. At last, in addition to a z coordinate, all the TIN models for stratum will now have the same vertex number, same x,y coordinates,and same topological relationship. Experiments showed that： ① this method can construct a seamless stratum model, ② is apt to convey special geological phenomenona like pinch out and lens body and so on, ③ the 3D stratum model is easy to section and analyze, ④and makes it easy to construct topological relationships between stratum.

关 键 词：无缝三维地层模型 钻孔 DEM 

分 类 号：P208[天文地球—地图制图学与地理信息工程] P53[天文地球—测绘科学与技术]