Abstract:To dynamically update the shape of orebody according to the knowledge of a structural geologist’s insight, an approach of orebody implicit modeling from raw drillhole data using the generalized radial basis function interpolant was presented. A variety of constraint rules, including geology trend line, geology constraint line, geology trend surface, geology constraint surface and anisotropy, which can be converted into interpolation constraints, were developed to dynamically control the geology trends. Combined with the interactive tools of constraint rules, this method can avoid the shortcomings of the explicit modeling method based on the contour stitching, such as poor model quality, and is difficult to update dynamically, and simplify the modeling process of orebody. The results of numerical experiments show that the 3D ore body model can be reconstructed quickly, accurately and dynamically by the implicit modeling method.

Key words: three-dimensional geomodeling; implicit modeling; radial basis function; structural anisotropy; geological rules