Study On Three - Dimensional Model Of Meiling Copper Polymetallic Deposit In

With the advanced development of 3D mine software and visualization technology, the 3D geological software is widely applied in the mine planning and production monitoring as well as exploration projects, it can be used in fields of geological database establishment and management, geological model construction, orebody modeling, resources and reserves estimation, and mine production design, open pit limit optimization and production schedule arrangement. The application of 3D geological software greatly improves the level and efficiency of mining technology.On the basis of analyzing the current status and development trend of the 3D visualization modeling in field of geosciences, and the 3D mine software in the grade modeling and exploration planning, the thesis focuses on the construction of the 3d geological models and resource modeling, open pit boundary optimization and application of variogram modeling in the exploration plan etc. by the study of the Meiling copper-zinc-gold deposit, Xinjiang using Micromine software. The main research achievements are as followings:(1) Constructing 3d model of the Meiling Cu-Zn-Au polymetallic deposit, including geological database construction; construction of 3D solid models including orebody model, fault model and terrain model; statistical and geostatistical analysis of the samples; grade models of copper variables for the copper orebodies; plotting of tonnage-grade curves of the deposit;(2) Through the integrated analysis of variation of forms, thickness, grades of M1, M2, M3, M10 and M12 orebodies, it is concluded that the main orebodies within the Meiling deposit occur as simple stratoid form, the overall orebody thicknessbelongs to stable type, and the copper grade ranges from the uneven type to the homogeneous type. There is a positive correlation between the thickness of ore body and the copper grade.(3) Considering the practical exploration situation, the drilling grid is analyzed by dividing the deposit area into the two sub-areas to judge whether or not the previous drill plan is suitable for this type of deposit. The experimental variograms of copper grades of Area 1 from Exploration Section Line M63 to M19 and Area 2 from Exploration Section Line from M15 to M16 are calculated in different directions. By the structural analysis of variogram models, and the determination of the exploration line spacing based on the range values of the variogram model curve along the orebody strike and dipping directions, it is concluded that the optimal drill grid in Area 1 is 73m X 84m, and the Area 2 is 36m X 70m.(4) By the application of open pit limit optimization function model within Micromine platform, the mining boundary design is studied in different conditions of copper metal market price. The modeled seven kinds of mining boundary design schemes provide the dynamic management basis for the current mining operation, i.e., the mine can select the optimal mining boundary design scheme based on the current copper metal price.