基于单元划分的复杂岩层面三维建模方法研究  

Research on 3D modeling method of complex rock strata surfaces based on unit division

作　　者：刘勇[1,2,3] 崔洪庆 

机构地区：[1]河南理工大学安全科学与工程学院,河南焦作454003 [2]河南省瓦斯地质与瓦斯治理重点实验室,河南焦作454003 [3]中原经济区煤层(页岩)气河南省协同创新中心,河南焦作454003

出　　处：《工矿自动化》2017年第12期99-103,共5页Journal Of Mine Automation

基　　金：国家自然科学基金资助项目(41372160)

摘　　要：针对现有岩层面三维建模方法未系统考虑含断层、陷落柱等地质条件的复杂岩层面三维模型构建的问题,通过定义投影度和投影单元,给出了不同地质条件下岩层面水平投影单元特征,同时提出一种基于单元划分的复杂岩层面三维建模方法。先划分岩层面水平投影单元和空间插值单元,将水平投影单元边界、空间插值单元边界、岩层面控制点和控制线作为约束条件,对实投影单元进行约束Delaunay三角剖分;然后分别求解各个空间插值单元内三角网顶点对应的岩层面空间插值点,并应用计算机三维图形技术绘制岩层面三维图形。实例分析结果表明,通过划分水平投影单元和空间插值单元,可将复杂岩层面分解为多个一般岩层面,从而降低其三维建模难度;合理进行约束Delaunay三角剖分和空间插值,可有效构建复杂岩层面的三维模型。In view of the problem that existing 3 D modeling method of rock strata surfaces does not systematically consider the construction of 3 D modeling of complex rock strata surfaces with geological conditions such as fault and collapse column,horizontal projection unit features of rock strata surfaces under different geological conditions were given by defining the projection degree and projection unit,and a3 D modeling method of complex rock strata surfaces based on unit division was proposed.Firstly,the horizontal projection unit and the spatial interpolation unit of rock strata surface were divided,and constrained Delaunay triangulation was performed on real projection unit by using horizontal projection unit boundary,space interpolation unit boundary,control point and control line of rock strata surface as constraints.Then interpolation points of the rock strata surface corresponding to vertices of the triangulation in each spatial interpolation unit were respectively solved,and the 3 Dgraphics of the rock strata surface were drawn by using 3 Dcomputer graphics technique.The example analysis results showthat by dividing the horizontal projection unit and the space interpolation unit,the complex rock face can be decomposed into several general rock facets so as to reduce the difficulty of 3 D modeling;reasonable constrained Delaunay triangulation and spatial interpolation can effectively construct 3 D model of complex rock strata surfaces.

关 键 词：复杂岩层面 三维建模 单元划分 约束DELAUNAY三角剖分 投影单元 投影度 

分 类 号：TD67[矿业工程—矿山机电]