Research And Implementation Of Core Mineral Filling System

Analyzing the mineral distribution by core drilling is an important means for geology and mineral exploration.Due to the limitation of human and financial resources,it is impossible to establish a large number of core drilling in the actual exploration area.How to use a small amount of core data to predict mineral abundance and stereoscopic mapping is the key to visualization of geology and mineral exploration.Based on a small amount of core data,this paper researches and implements the key technology of core data stereoscopic mapping.The main work is as follows:1)Based on the core data obtained from the limited drilling in the exploration area,this paper using Kriging establishes a mineral abundance stereoscopic mapping method.The method decomposes the exploration area into many voxels.Kriging is used to predict the unknown mineral abundance of voxels.By establishing the relationship between mineral abundance and color mapping,the stereoscopic mapping in the exploration area is realized.The effect of different variogram on mineral abundance prediction is analyzed in detail and the experimental result is given.2)Combined with Generalized Tri-Prism(GTP)geometric expression and BP neural network,this paper designs a core mineral prediction and stereoscopic mapping method.This method adopts Triangulated Irregular Network(TIN)to establish the connection between core drillings.The exploration area is expressed geometrically based on the Generalized Tri-Prism model,then the exploration area is decomposed into many voxels.BP neural network is used to predict the mineral abundance of voxels in each Generalized Tri-Prism model.3)Based on TIN-GTP-TEN geometric model,this paper designs a mineral abundance stereoscopic mapping method.This method adopts Triangulated Irregular Network(TIN)to compose the GTP model.The Smallest Vertex Identifier(SVID)is adopted to split the GTP model diagonally into tetrahedron network(TEN),then the mineral abundance of the tetrahedron is calculated by inverse distance method.Finally,the experimental result is given.The experimental result shows that this method can overcome the inconsistency of the ore body cutting and express the external contour of orebody more accurately.4)Integrating the above stereoscopic mapping method,this paper researches a core mineral stereoscopic mapping system based on OpenGL.This system can realize three dimensional observation of stereoscopic mapping and ore body cutting.Through the verification and demonstration of test data,good visual results are obtained.