Study On Coal Seam Thickness Variation And 3D Modeling Based On GIS

Coal seam thickness data is essential for the mine design and exploitation. Predicting coal seam thickness accurately not only can provide strong coal mine geological guarantee, but also can bring huge economic benefits. Coal Seam 3D modeling and visualization is intuitive, accurate, dynamic and information-rich, which can effectively improve exploration information management level, greatly improve labor productivity, reduce working intensity, accurately make mineral resources planning decision, and reduce the risk of exploration of mineral resources. Thus, coal seam thickness quantitative prediction, 3D modeling and visualization have great significance in the process of coal mine designing and actual production.Based on the relevant theoretical study of spatial interpolation and three-dimensional modeling on GIS, inverse distance weighting method, trend surface analysis, splines and ordinary Kriging interpolation method are used for coal seam thickness interpolation when dealing with actual drilling data in study area, and ordinary Kriging interpolation is taken example to detail its interpolation process. In addition, cross validation is applied to compare the advantages and disadvantages between each interpolation methods, the quantitative indicators show that Kriging method has the better precision. On that basis, object-oriented development approach, ArcGIS Engine-based development platform,.NET3.5 framework, C # language development environment is adopted with drilling coal seam thickness and bottom contour line data to structure coal seam roof and floor TIN data model, then a three-dimensional coal seam model was built on the basis of surface tension expansion method, at this point, coal seam three-dimensional modeling and visualization was completed. Finally, every functional module is integrated to form a three-dimensional modeling system, and then actual drilling data is used to test the system, the result confirms the practicality and feasibility of the system. So, it provides a feasible method for the construction of the mine three-dimensional.