Development of 3D seamless engineering geological modeling system

On the basis of boundary representation, the notion of sealed engineering geological model is proposed; and an approach for building a seamless engineering geological model based on wire frame is presented. And a sealed modeling software system, ROCKModel, is developed. This system includes three main components: original data transforming tools, solid modeling tools and auxiliary tools. And it includes eight basic functional modules, such as: mesh generation for surface and solid, surface interpolation, surface intersection searching, etc. Based on these basic modules, five key algorithms, creating complex surfaces, creating wire frame, interfaces modification and reconstruction, blocks searching, and 3D rock quality classification are proposed and realized. This system can build and visualized seamless models for complex geological and engineering objects, and provide geometrical models for numerical simulation software directly.