Establishment Of Stratigraphic Structure Model In Huainan Mining Area Based On VR-GIS

With the rapid development of information technology,especially in the rapid development of the coal industry,the data information of mining resource exploitation is increasing,and these data cannot be used to make spatial information more fully express spatial information under the record of traditional technology.The preservation of massive data is difficult.With the rapid development of computing technology,especially the development of 3D visualization technology,3D visualization technology can realize three-dimensional display of mining area geological structure and resource distribution.3D visualization of mining area for mining area resources,geological structure research,mining area management,planning Etc.has important meaning.Based on the actual borehole histogram data of Huainan mining area,the paper uses the spatial interpolation algorithm,TIN and Multipatch data model to establish the stratum model of Huainan mining area.Under the ArcGIS Engine development environment,the 3D visualization system is developed and designed.The main contents are as follows:The design of the drilling database and the collation and numbering of the drilling data;the drilling data is the three-dimensional model of the formation to establish blood,and the analysis of the 3D model by the 3D visualization system is also very dependent on the drilling data,so the paper is extracted at the beginning.The drilling data is numbered and layered,and a database for storing drilling data is designed based on the numbering and stratification of the holes.Comparative study of spatial interpolation algorithms;based on borehole data,ground interpolation is performed on four kinds of spatial interpolation algorithms:inverse distance weight interpolation,Kriging interpolation,radial basis neural network interpolation and local polynomial.Cross-validation and sample inspection are used.The two methods compare and analyze the four interpolation algorithms,and the Kriging interpolation algorithm is more suitable for spatial surface interpolation in Huainan mining area.The research of 3D data model and the establishment of 3D stratum model;the selection of 3D data model has certain constraints on the function realization of 3D visualization system.The paper selects the 3D modeling model of Multipatch data model according to VR-GIS related technology,and then uses multiple layers.DEM builds a three-dimensional data model of the Multipatch data model.Moreover,using the interpolation surface to create a TIN surface optimizes the smoothness of the three-dimensional layer.The design of 3D visualization system;based on the above 3D stratum model and drilling database,the 3D stratum visualization system was designed by using ArcGIS Engine development language.The requirements analysis of the system is introduced.Overall design functional design and renderings.The system implements data loading,three-dimensional analysis,spatial analysis,drilling database update,measurement,three-dimensional information query,three-dimensional layer roaming,translation and other operational functions.