MULTI-SCALE SPATIAL MODELING FOR GEOLOGICAL BODY BASED ON GTP MODEL

Three-dimensional (3D) modelling of geological body is an important issue of 3D GIS and 3D Geosciences Modelling, and one of the key technologies of digital mine. GTP model and its components are introduced in this paper. According to the relations between chronolith and rock attribute comprehensively, the modelling region, system, series, group and rock characteristics(R- C) are regard as the scale series for geo-spatial data organization and 3D model generation. Meanwhile, the method for 3D multi-scale spatial modelling of geological body is proposed, and its main process includes: 1) to generate Delaunay TIN (D-TIN) of the geological upper surface according to borehole’s collar data; 2) to construction geological body model (CGBM) with the scale of “the whole geological body (WGB); 3) to construction model of geological body with the scale of System, Series, Group and R-C; 4) the faults and folds are look as one of scale during multi-scale modelling for geological body. The functions of 3D spatial modelling, visualizing and engineering designing for or on the complex geological body, is developed on GeoMo3D and it were verified with an iron mine as an example