主TIN模式下面向拓扑的三维地质块体构建方法

The topology-oriented method of building 3D geological block model based on primary TIN

当前普遍采用主TIN模式对层状地质体进行三维结构建模,然而在地质块体的构建方面还有所欠缺。考虑到由于尖灭、出露等现象引起的各地质块体间空间位置关系的复杂性,根据主TIN建模的特点,处理完地层相交与高程调整之后,通过对地层面中某个区域内的三角网与上下地层中对应区域内的三角网的重叠次数的不同,设置子面类型标记,从而分离出一个地层面中不同类型的子面。依据子面的类型可以快速建立地质块体与被引用的各子面之间的对应关系,最终自动分离出地层中的各个地质块体,并保证相邻块体在邻接处有唯一的公共子面,由此可建立各地质块体间的空间拓扑关系。

Currently,primary TIN modeling is widely used to build three dimensional structures of stratified geological objects. However,it is deficient in building geological blocks. Considering the complex location relationship among different geological blocks which caused by disappearance,outcrop and other phenomena,according to features of primary TIN modeling,the sub-face type marks can be set up due to the difference of overlapping frequency of the triangulation networks in corresponding areas among different strata levels after strata intersection and elevation adjustment. This is in order to separate different sub-faces in one stratum level which have different sub-face type marks. The corresponding relationship between geological structural blocks and sub-faces referenced could be built instantly through the type marks of sub-faces. Eventually,geological structural blocks can be separated automatically; and it ensures that the adjacent blocks have the only public-face at the adjoiner. From this,the topological spatial relationship among different geological structural blocks could be established easily.