基于Coons曲面与约束三角网的区域地质调查三维建模方法

发布时间：2018-08-16 19:17

【摘要】：目前基于野外地质调查数据自动、快速地建立区域三维地质体模型是中国全面开展三维数字地质填图的迫切需求。本文基于产状、地质界线与路线剖面等野外区域地质调查要素,提出了一种二维平面地质图及路线剖面图向三维地质体模型的快速转换方法。该方法针对无剖面约束及含剖面约束2种情形,通过地质界线区域分割、多段线仿射变换等空间几何变换处理,推估出剖面线约束的地下地质界线,基于Coons曲面构建出地质体的侧面模型;然后,通过约束三角网算法构建地质体的顶、底面模型,最终建立拓扑一致的区域地质体三维模型。基于此方法,对中国1:2.5万区域地质调查试点区域进行了区域三维地质建模实践,实现了火山口、地层、岩体、断层等典型地质构造的快速三维重建。
[Abstract]:At present, it is an urgent need for China to develop 3D digital geological mapping in China, which is based on field geological survey data automatic and rapid establishment of regional 3D geological body model. Based on the field geological survey elements such as occurrence, geological boundary and route profile, this paper presents a fast transformation method from two-dimensional plane geological map and route profile to 3D geological body model. This method is used to estimate the underground geological boundaries with section constraints by means of spatial geometric transformation processing, such as regional segmentation of geological boundaries and affine transformation of multi-section lines, for the two cases with no profile constraints and with section constraints. The side model of geological body is constructed based on Coons surface, and then the top and bottom surface model of geological body is constructed by constrained triangle network algorithm, and finally the 3D model of regional geological body with consistent topology is established. Based on this method, the regional 3D geological modeling practice has been carried out in the pilot area of regional geological survey of 1: 25, 000 in China, and the rapid 3D reconstruction of typical geological structures such as crater, stratum, rock mass and fault has been realized.
【作者单位】：东北大学资源与土木工程学院;中国矿业大学环境与测绘学院;中国地质调查局发展研究中心;
【基金】：中央高校基本科研业务费项目(N140104002) 辽宁省科学技术基金项目(2015020581) 中国地质调查局发展研究中心智能地质调查支撑平台建设与应用项目(12120115073201) 国家自然科学基金项目(41001228)
【分类号】：P628

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