3D Modeling And Contours Mapping Of The Complex Geological Body Containing Faults

In especial demand for the forecast of searching for mines, the evaluation, exploitation and utilization of mineral products, deeply researching the technology of 3D visualization of geological body looks more important. 3D mathematical description and simulation about Complex geological body containing faults has still been researched in the groping phase. According to boring drill core data, section data formed by explanation to seismic section, correlative data obtained by territorial geologic investigation, based on 2D or 3D section, forming rational fault section, then building TIN model of geological body. These are the main technical itinerary.From the development and present status of automatic mapping contour maps, we know that the technology of automatic mapping contour maps which contains faults especially cross bedded faults was developed slowly, which are part of contour maps. In the process of our factual work, the phenomenon of half-handcraft mapping contour maps containing singular and cross-bedded faults is ubiquitous. By discussing the theory of mapping contour maps, we realize the automatic mapping contour maps including singular and cross-bedded faults.Besides the brief introduction to the definition, characteristic development and application of Digital Elevation Model, we introduce triangle irregular network as a kind of importantly expression methods of DEM and in detail expatiate the creating methods of Delaunay triangulation network. Making use of the data structure of dispersed points, we can build DEM of terrace and faults appeared by triangle irregular network. Utilizing the principle that an intersected line may exist in two triangles, we can obtain a great deal of intersected lines exiting in the terrace and the fault triangles. In particular, we can process the intersected lines of cross-bedded faults and the terrace triangles. We regard the intersected lines as restricted sides, and carve up the effect areas of these sides, then triangulate the areas, as a result building the fault model. Once fault model was build based on singular terrace, we can sew up many terraces, and establish three dimension geological body, and realize three dimension visualization. Avail oneself of the fault model, we can search for equivalent points from every side of restricted triangle irregular network, connecting equivalent points, eventually obtaining slippery curves, i.e. contour maps. As a result, we can acquire the automatic mapping contour maps.