To dynamically update the shape of an orebody according to the knowledge of a structural geologist's insight, an approach of orebody implicit modelling was presented from raw drillhole data using the generalised radial basis function interpolant. 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 simplify the modelling process of orebody and avoid the shortcomings of the explicit modelling method based on the contour stitching, such as poor model quality and difficult to update dynamically. The results of numerical experiments show that the 3D ore body model can be reconstructed quickly, accurately and dynamically by the implicit modelling method., To dynamically update the shape of an orebody according to the knowledge of a structural geologist's insight, an approach of orebody implicit modelling was presented from raw drillhole data using the generalised radial basis function interpolant. 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 simplify the modelling process of orebody and avoid the shortcomings of the explicit modelling method based on the contour stitching, such as poor model quality and difficult to update dynamically. The results of numerical experiments show that the 3D ore body model can be reconstructed quickly, accurately and dynamically by the implicit modelling method.