Research On3D Geological Modeling And Visualization Of Digital Mine

The rapid development of digital mine profoundly has changed the traditional miningproduction activities. In recent years, our country’s mining industry has made big progress ininformatization construction, but the overall situation is still not optimistic. Compared withother industry’s informatization level, there is a certain gap. Construction of digital mine canpromote the modernization process of mine production and operation management. This workhas important practical significance.3D geological model can accurately express all sorts ofgeological phenomena and intuitively reappear the spatial distribution of the geological unitsand their mutual relationship. These advantages are of great help to the practical work, such asdecision-making in engineering, geological analysis and automated cartography etc. Real andeffectively building3d geological model is one of the key technologies of digital mine.Because of the complexity of the geological phenomenon, geological3d modeling also hassome problems. Based on the research of3d data model, this paper discusses the method of3dgeological modeling and visualization. The main research contents and results are as follows:(1) Analyse and process spatial data of mine. This research mainly include: calculate3dcoordinate of points of drill hole axis, calculate3d coordinates of drill hole axis and stratumsurface, insert virtual drill hole and calculate it’s ostiole3d coordinate, divide and numberstratum of study area. Finally, this research design drill hole database and realize storage andmanagement of mine geological data.(2) Study the classification and characteristics of3d spatial data model. Based ondistribution characteristics of mine data and application purpose of3d model, this paperchoose quasi tri-prism as basic volume to build3d geological model. The improvement ofdata structure and modeling algorithm of quasi tri-prism make it can better adapt to thecomplex geological body modeling. This research study the construction algorithm of TIN,expansion rule of triangle, modeling algorithm of quasi tri-prism, construction algorithm oftopological relations, and finally design geologic body database and realize storage andmanagement of geological modeling data.(3) Using c#programming language and DirectX graphics library, design and develop a 3d geological modeling and visualization system. This system has realized construction andvisualization of stratum model, fault model and drill hole model. The system has3d roaming,information query, spatial analysis, spatial positing, and other functions. Finally, based on thereal mine data, modeling algorithm is verified. Geological model has been made basic reflectthe stratum distribution of mine area.Results show that this modeling method has the following advantages, such as rapidmodel building, less human intervention and uniqueness of modeling results. This method cansimulate complex geologic structure, such as pinchout stratum and fault. This method canbuild spatial topological relations which is very help for spatial analysis. This modelingmethod can basically meet the3d geological modeling work of digital mine.