Research On Method Of 3D Geological Modeling And Dynamic Updating Based On The OO-Solid Model

Three-Dimensional Geological Modeling (3DGM) is one of the key issues of Three-Dimensional Geological Information System (3DGIS) and Data Mine. It is significant that its'research results apply in the region of basic geological research and resource exploration and development.The Geographic Information System (GIS) theory as a guide, point-set topology theory as basis, this paper uses object-oriented method to study on profile-based three-dimensional topological data model and data structure. By use of computational geometry, GIS, computer graphics images, 3DGM, the construction and dynamic updating methods of 3DGM are researched on the basis of amended OO-Solid data model. In research on data model and data structure, according to the limitations of modeling, data model and its elements of OO-Solid was revised. After revision, the revised OO-Solid data model was formal described, and the topological relationship and data structure was redesigned. Based on the revised OO-Solid model, the paper researched the construction methods of three dimensional geological models, includes the process of 3DGM the definition of spatial profile and generated methods, the generation methods of body element, generation methods and key algorithms of 3DGM. The new algorithm which the auto construction about topological relationship of profile modeling elements are automatic constructed, was proposed. The new idea, which was inferred the mid-profile on the basis of known fore-profile and back-profile, was given. The new method, which was divided the complex geological model and constructed later, was put forward. Based on revised OO-Solid data model in the dynamic updating methods of three-dimensional geological model, the new idea, which was updating from up to bottom, and the dynamic updating method about point, line, surface and body are proposed. On the basis of above study, SQL Server2000,VC++6.0,OPENGL as tools, the experimental system was designed and developed. It was shown that the paper verify the practicality and effectiveness of three-dimensional data model, three-dimensional modeling methods and algorithm for dynamic update by using examples of the actual coal mine exploration and production data from ZhangCun mine in HeBei Jinniu energy company limited.