一种基于GTP的复杂地质体真3维建模方法:岩柱体分区法

在总结分析现有复杂断层及倒转褶皱3维建模方法的基础上,提出一种基于广义三棱柱(GTP)的3维交互建模方法(岩柱体分区RPBP建模法)。文中定义了岩柱体、界限三角形两个重要概念,RPBP法可以通过构建断层界限三角形,将复杂断层系转化为多个简单断层系,然后采用构建简单断层系模型的方法来实现复杂断层系的3维建模;而对于倒转褶皱,RPBP法则通过构建褶皱轴界限三角形避免数据局部重复和冲突,使GTP建模过程得以顺利进行。实验表明,该方法能便捷可靠地实现含多断层相互切割、倒转褶皱等复杂地质体的真3维建模。

A Real 3D Modeling Method for Complex Geological Bodies Based on GTP:Rock Pillar Body Partition Modeling

Based on the summarization and analysis of the existing 3D modeling method for complex fault and overturned fold,this paper put forward the 3D interactive modeling method based on Generalized Tri-Prism (GTP) which is rock pillar body partition modeling (RPBP). This paper defined the important concepts of rock pillar and boundary triangle. Through constructing the boundary triangle of fault,we can translate the complex fault into several simple fault series using RPBP method,and realize the 3D modeling of complex fault using the method of constructing simple fault series model. For the modeling of overturned fold,we can construct the boundary triangle of fold axis using RPBP method to avoid the partly repetition and conflict of data,and implement the GTP modeling. The experiment showed that the RPBP method can conveniently and reliably realize the real 3D modeling for complex geological bodies which contain multi faults and overturned fold.