地质矿产三维形态重构及属性场建模研究

发布时间：2018-02-27 16:05

本文关键词： 三维地质建模形态建模属性建模体函数模型四面体三棱柱　出处：《中国矿业大学(北京)》2017年博士论文　论文类型：学位论文

【摘要】：地质现象和地质信息本质上是三维的,三维地质建模技术能够使得地质工作者更加全面准确地掌握地下地质情况,这是二维地质平面图件难以实现的。同时,三维地质建模已经逐步从单纯的形态建模向形态、属性建模并重这一方向发展。本文对地质矿产的形态和属性三维地质建模理论和方法深入开展了研究。针对复杂煤层底板面,以断层线、煤层边界线为界线将煤层底板划分为内部均一的小块,然后分块三维重构,最后综合生成复杂煤层三维底板面。针对各类地质数据对断层揭露不完备,使用地质勘探剖面图、煤层底板等高线图联合地形地质图等多源多类别地质数据重构勘探区完整精细的三维断层模型。针对地质矿产属性场中地质属性连续变化这一特点,深入研究了线性、二次和三次四面体体函数的插值原理,并编程实现了三露天勘探区地下温度场的线性四面体体函数模拟,内蒙某勘探区地下电阻率场的二次和三次四面体体函数模拟,对模拟结果进行了对比分析,取得了良好效果。针对地壳圈层中层状结构地质体的地质属性沿着层面方向和垂直于层面方向的变化率存在显著差异这一特点,提出地理学第二定律补充定律来表征层状介质属性顺层和穿层方向变化率存在很大差异这一普遍规律,并使用三棱柱体函数模型模拟层状介质的地质属性变化,详细研究了线性和二次三棱柱体函数插值原理,然后使用一组模拟数据,基于三棱柱体函数模型进行检验,验证了上述所提定理。
[Abstract]:Geological phenomena and geological information are three-dimensional in nature. 3D geological modeling technology enables geologists to master underground geological conditions more comprehensively and accurately, which is difficult to realize in two-dimensional geological plans. Three-dimensional geological modeling has gradually developed from simple morphological modeling to morphological modeling with equal emphasis on attribute modeling. In this paper, the theory and method of 3D geological modeling of geological and mineral resources are deeply studied. Taking fault line and coal seam boundary line as the boundary line, the coal seam floor is divided into uniform small blocks, then divided into three dimensional reconstruction blocks, and finally the complex coal seam three-dimensional floor surface is generated synthetically. In view of the incomplete disclosing of faults by various geological data, Using geological exploration profile map, seam floor contour map and topographic geological map to reconstruct the complete and fine 3D fault model of exploration area, aiming at the continuous change of geological attribute in geological and mineral attribute field. The interpolation principle of linear, quadratic and cubic tetrahedron functions is studied in depth, and the linear tetrahedron function simulation of underground temperature field in three open pit exploration area is realized by programming. The quadratic and cubic tetrahedron function simulation of underground resistivity field in a certain exploration area in Inner Mongolia is carried out and the simulation results are compared and analyzed. Good results have been obtained. In view of the significant differences in the rate of change of geological properties along and perpendicular to the stratigraphic direction of the middle structure geological bodies of the crust, The second law of geography is proposed to supplement the law to characterize the fact that there is a great difference in the variation rate of stratified media attributes in the direction of stratification and transgression, and the triangular column function model is used to simulate the variation of geological attributes of layered media. The interpolation principle of linear and quadratic triangular prisms is studied in detail. Then a set of simulation data is used to verify the above theorem based on the three-prism cylinder function model.
【学位授予单位】：中国矿业大学(北京)
【学位级别】：博士
【学位授予年份】：2017
【分类号】：P628

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