基于广义三棱柱的三维地质体建模及可视化研究

根据钻孔数据的特点,建立了一种以广义三棱柱作为基本体元的三维地质体模型,同时给出了构模过程和关键算法。该方法首先将原始的钻孔数据进行Delaunay三角剖分,生成表面的不规则三角网,然后顺序连接相邻钻孔上相同的地层片段形成三棱柱,并进行尖灭处理,最后迭代搜索出连续的相同属性的地层,构建层叠式的三维地质体模型。结果证明该方法能够有效地模拟层状的地质结构构模。

Research for Modeling and Visualization of 3D Stratum Based on Generalized Tri-Prism

Considering the specialty of borehole data,a method based on volume element of tri-prism was used to build the stratum model,the key algorithms of modeling were presented here in detail.The method firstly triangulates the original borehole data to generate triangulated irregular network,then links the corresponding segment of boreholes and pinches out the stratum to get double-linked list of tri-prism.Finally stratified stratum model is built by an iterated search algorithm which searches for consecutive layer every time.The result showed that this method can deal with stratified stratum modeling effectively.