基于钻孔数据的三维地质建模与可视化研究

3D modeling and visualization of geological bodies based on borehole data

三维地质模型能够完整准确地表达复杂地质现象的边界条件及地质体内含的各种地质构造,直观地再现地质单元的空间展布及其相互关系,最大限度地提高地质分析的直观性和准确性,因此三维地质建模已引起地质、采矿、岩土工程等诸多领域的日益重视。笔者在综合考察多种建模方法的基础上,结合工程实践,提出了一种实用的工程地质三维建模实施方法。该方法以钻孔资料和地质剖面数据为三维地质建模的源数据,允许用户手工修正模型剖面地层分界线,从而实现对建模过程的干预和控制,克服了单纯依靠钻孔数据建模结果不精确且难以修正的问题。最后,通过一个研究实例展示了该方法的实际建模效果。

3D geologic models can completely and unambiguously define the geologic structures for the site being modeled, including complex boundaries and embedded seams. This can hel Pgeologists and engineers to understand their research objects better and greatly enhance the accuracy of geologic analysis. So the technique of reconstructing 3D geologic model attracts more and more attention from many industries such as mining, geotechnical engineering and so on. On the basis of the former researches, combined with practice, a simple and practical approach for generating 3 D geologic models from borehole and cross-section data is presented. The approach allows people to intervene modeling process and modify result model by introducing user-defined cross-sections. Through sampling of stratum boundary on user-defined cross-sections, a mass of spacial interpolating points are obtained, which brings better interpolation effect for every stratum in the new round of modeling process. The approach not only possesses faster process speed than former approaches but also can commendably solve many problems caused by only using borehole data, such as imprecise and unmodifiable modeling results. Finally, the actual effect of the approach is shown in a case study.