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The deposit modeling technology based on fractal geostatistics theory research and practice

Author: ZhouZhiYong
Tutor: ChenJianHong
School: Central South University
Course: Mining engineering
Keywords: Fractal Geostatistics Deposit modeling Terrain modeling Grade Reserve
CLC: TD163
Type: Master's thesis
Year: 2005
Downloads: 406
Quote: 9
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Abstract


Deposit model is through the use of computers, fractal geostatistics calculated geometry, computer graphics technology to build up on the distribution of ore bodies, spatial form, structure, and mine geological attributes (such as grade, lithology, etc.), digitized mineralization model, it is further reserve calculations, computer-aided mine design, planning, management, and the basis of simulation. Deposit model is of great significance for improving production efficiency, to achieve dynamic management of resources / reserves, as well as visual mining and digital production. In this paper, based on fractal geostatistics theory, combined with the specific realities of our mines, on deposit modeling technical problems surrounding terrain modeling, lithology modeling, grade modeling research. Nonlinear Science fractal introduced to the deposit modeling. Fractal generation and its object of study. Discusses the definition and calculation of fractal theory and fractal dimension. Obtained through some real phenomenon and a comprehensive analysis of the large number of domestic and foreign literature, many deposit has a fractal structure, spatial distribution, and the conclusions of the various types of mineralization information available fractal theory to study the orebody. Research points to the formation of ore enrichment model obtained can be used fractal geostatistics combined ore grades and reserves calculation conclusion. Geostatistics of the background research content relative to the superiority of the traditional reserve calculation methods and classical probability statistical methods. Discusses some of the basic concepts of regionalized variables, the variogram its theoretical model, the variation curve, structural analysis of geostatistics. And a detailed description of ordinary kriging. Proposed in accordance with the general procedure of the deposit modeling the deposit modeling system mode. Model positioning and model unit block structure, sample portfolios, data search, and gives a sample portfolio and data search method. Terrain modeling approach, given the trend surface distance power is inversely proportional method and kriging for terrain modeling formula. Defects exist for the traditional terrain modeling method introduces two methods based on three-dimensional terrain modeling of sub-dimensional Brownian motion (fBm) practical algorithm - midpoint displacement method and space the polyhedral deformation interpolation algorithm. Discuss a the lithologic modeling method and its process, lithology modeling combined with lithology information and experience to explain. Polygon method, the distance power inversely proportional to the law as well as the kriging three grade modeling methods, and gives the formula of the three modeling methods. From the cross-validation of the experimental variogram calculated theoretical variogram fitting variogram parameters for the most common kriging, kriging aspects were discussed in detail. DMS and Surpac Vision software on the basis of theoretical studies, a mining deposit modeling practice. Established the mine geological database, the database, a total of 147 boreholes the 8799 sample TFe, V 2 O 5 , S, P, FeO, FeCO 3 , Fe 3 O 4 seven elements, mines can be retrieved at any time to update and call is conducive to the dynamic management of the mine production. Distance power is inversely proportional to add fractal interpolation algorithm terrain model. Lithology model of the ore body delineation, and to make the the orebody entity model diagram. Iron (TFe) variogram analysis to determine the variogram parameters. And variogram parameters of cross-validation, the data show that the combination kind of valuation is unbiased, calculated variogram parameters can be used to establish grade model. Grade iron using kriging modeling, and model statistical analysis diagram is drawn according to the established model, hierarchical plan, longitudinal sectional view of line by cross-sectional view of various grade ranges block model diagram. Finally, based on the establishment of a deposit model reserves statistics, given the reserves

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CLC: > Industrial Technology > Mining Engineering > Mining geology and measurement > Mine geology
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