中文摘要：

针对断层地质体三维实体建模中存在的问题,提出了一种能够恰当表达断层地质体的真三维模型-VGTP模型.引进了虚拟地层延伸面的概念,减少了VGTP体元构成的复杂性,建立了一种基于VGTP模型的单断层地质体建模算法;针对一个VGTP体元中包含多种不同质地层体的情况,逐一计算包裹每种地层的多面体;通过一种多面体的四面体剖分算法-切角法,把地层多面体剖分成四面体.该算法屏蔽了建模过程的复杂性,整个建模过程较少用户干预,提高了建模过程的自动化水平,为矿山断层地质体三维建模提供了一种新的思路.

英文摘要：

To solve problems in solid modeling of geological-body containing fault,a true-3D model named VGTP is presented,which can rightly express geological body with single-fault.The new concept of virtual-stratum-face is introduced and the complexity of VGTP structure is reduced,an algorithm for geological fault modeling based on VGTP is put forward.Considering the fact that a VGTP consists of several different strata,an algorithm is designed to generate one or several polyhedrons to closely wrap up every stratum in the VGTP.Afterwards,by a method named corner-cutting,every stratum-polyhedron is divided into tetrahedrons.During the entire modeling,little intervention is needed,therefore the automation level of this algorithm is enhanced greatly,so a novel thought for 3D modeling of geological body with fault is provided.