The key is to redce uncertainty by applying as much geological input dunng the creation of a model, and to develop tools to validate and quantify the reliability of a model saksa. Implicit 3d modeling of ore body from geological boreholes. Ore is natural rock or sediment that contains one or more valuable minerals, typically metals, that can be mined, treated and sold at a profit. These professionals have extensive experience developing models and evaluation procedures. Ore body modelling and comparison of different reserve estimation techniques a thesis is submitted in partial fulfillment of the requirements for the degree of bachelor of technology in mining engineering by manasa chandra moharaj 110mn0435 yeshi wangmo 110mn0440 under the guidance of prof.
The geology and mining system jms is a computer aided valuation system capable of generation of survey, stratigraphy, assay databases, drill hole and bench compositing, 2d and 3d log. Practical applications of a computer orebody modelling. Geological risk assessment of ore production uncertainty in ore production. Department of mining engineering for permitting us to carry on the topic ore body modelling and comparison of different reserve estimation techniques and. Ore body modelling geology conceptual model free 30. Mineralogybased geometallurgical modelling employs quantitative mineralogical information, both on the deposit and in the process.
Sgs is a pioneer in computerbased orebody modeling and resource estimation, providing these services since 1981. Modeling bauxite thickness and volumes in arcgis by mike price, entradasan juan, inc. Computer aided ore body modelling and mine valuation 349 summed up to give ore thickness. Mining companies obviously need accurate ore reserve estimates since the quality of the estimate may directly affect the companys profitability. Computer programs are ready for ore body modeling after building a healthy database structure. Orebody modeling is the geological basis of your mine planning. Computer aided ore body modelling and mine valuation intechopen. Application or computers and operations research 111 the ml11erals industnes, south african institute of mining and metallurgy, 2003. The nature of spatial distributions of geological variables such as ore grades is of primary concern when modelling ore bodies and mineral resources. Mining orebody modeling and resource estimation the accurate estimation and evaluation of the size and extent of an orebody is crucial to the success of a mineral exploration program. According to geometry of ore body and block dimensions, number of rows, column and levels.
New directions in geology modelling and orebody evaluation. This tutorial uses techniques for estimating the volume and thickness of an ore that are employed by gis specialists working in the mining industry. Using mineralogical and liberation information for the spatial and process modelling makes the approach more realistic at higher level of process details. The aim of any mineral resource evaluation process is to determine the location, extent, volume and average grade of that resource by a trade off between maximum confidence in the results and. One major input for resource estimation is quantitative mineralogy information, which is increasingly being recognized as more important than mere elemental assays. Geological modelling of mineral deposits for prediction in. Geostatistical modelling of an orebody as an aid to mine planning. Harnessing uncertainty for orebody modelling and strategic. According to statistical analysis of cu grade, inverse distance method was selected for ore reserve estimation of ore body. Modelling blast fragmentation the common denominator in all models of fragmentation is the influence of rock properties and geologic structures within the blast. A computer representation of the mining block in the form of an ore model is then built using these kriged data.
One of these is kciras copper ore deposit located about. Ore is extracted from the earth through mining and treated or refined, often via smelting, to extract the valuable metals or minerals. Modelling the nugget effect mine splays effect coarse gold mineralized portions always produces very high assays, and our first response is excitement at the thought of high grade. Rely on us for orebody modeling, resource estimation and. Crosssection of an ore body plunging obliquely with.
Pdf on feb 3, 2012, kaan erarslan and others published computer aided ore body modelling and mine valuation find, read and cite all the research you need on researchgate. From this ore body model, optimization techniques are used to produce the ultimate pit. Optimized open pit mine design, pushbacks and the gap. The ultimate pit is the maximum valued pit possible that obeys slope and physical constraints. Practical applications of a computer orebody modelling system. Ore body ii was formed by magmatichydrothermal fluid activity on the basis of metallogenic theory, and orebody i forms the upper part of orebody iii based on the tongshan cu deposit model. Implicit 3d geological modelling applied to structurally. Process simulations in mineralogybased geometallurgy of iron. The volumetric accuracy of the model is crucial in valuation of an ore deposit. Pdf a fundamental requirement for mine design and planning operations is the development of an orebody model. The ore deposit 3d modelling, new effective solution in the. This study involves the study of ore reserve estimates and the modelling of ore body use of srpac. In certain areas, the footwall contact is a distinct change from ore to total waste rock, but the hangingwall contact is never as easily defined.
Gold and precious metals base metals iron ore coal uranium diamonds industrial minerals bauxite, barite, limestone for cement, salt, sands. Computer aided ore body modelling and mine valuation. Optimized open pit mine design, pushbacks and the gap problem. Estimation space of block model was defined as x 477835, y3112339 and z1920 m. We have provided modeling and resource estimation solutions to companies involved in the mining of. The ore definition is rarely a sharp a computer orebody modelling system geological discontinuity. Introduction university of queensland earth sciences erth7002 ore body modelling. Orebody iii was destroyed by tongshan fault in jurassic period.
The models show that when three or more ore bodies coalesce, the long axis of the merged ore body is perpendicular to the component ore bodies, and that ore bodies in the deposit may have a range of shapes due to both. The importance of accurate ore reserve estimates has always been recognized in the past. Jan 15, 2015 this leads into the ore mineralization to be interpreted as either discontinuous, small ore body, pocketslenses, or large laterally continuous ore body. The ore bodies that are created with this method are divided into blocks that represent the distribution of copper in%. Achieving this goal requires an understanding of how the process behaves for different ore types and the distribution of ore types throughout the ore body. Pdf computer aided ore body modelling and mine valuation. Using the software package leapfrog by aranz geo, we demonstrate that ore body geometries and mineralisation trends obtained from implicit 3d geological models can be linked to local and regional structural patterns observed in the field. Orebody modeling and resource estimation mining sgs. Limits of traditional modelling discounted cash flow531 1 3 5 7 9 0 2 4 6 8 101214. The usage of the synthetic ore body model is demonstrated through a case study of the malmberget iron ore deposit, in northern sweden. Geological software for resource modelling and estimation. Among them, threedimensional implicit modeling of the ore body has become a research hotspot of mining scholars all over the world in recent years.
In an everchanging world of uncertain markets, mismatches between demand and reserve base growth, new emerging technologies, and new technical problems and their solutions, this book represents a contribution to both old and new dimensions of a most intricate. Dec 15, 2019 ore body modelling and resource estimation are the foundation on which the business case for future mine development and operation is intricately dependent. M i n i n g associates introduction aims of the study. Naturally the key to a successful outcome is to specify the interpolation parameters such that the implicit model replicates what would be achieved, albeit in a much greater timeframe, with a manual 2d approach. Sgs provides independent interpretation and modeling services for the exploration industry. Modelling orebodies and applications regional threedimensional modelling of iron ore exploration targets v osterholt, o herod and h arvidson 43 conditional simulation of grades controlled by geological indicators c xu and p a dowd 51 mining geostatistics with the open source sgems software and the gstl library a boucher 59. Sgs has the geologists and engineers to help develop the modeling program that is right for your project. Accurate prediction of the shape, location, size and properties of the solid rock materials to be extracted during mining is essential for reliable technical and financial planning. A discussion on 3d geology and resource estimation. This publication presents the latest advances, technologies, practices, and concerns in strategic mine planning and orebody modelling. Ore liberation modelling by minerals topological evaluation. The geological model must describe the minerals present, give their chemical composition, report their mass proportions modal composition in the ore body and describe the ore texture.
Typically, an ore body model of what is predicted to be in the ground is produced through one of various techniques 14. This method of modelling ore bodies reduces the time and cost for research and exploitation by facilitating the work. This is achieved through geological modelling of the threedimensional 3d shape and properties of the materials present in mineral deposits, and the presentation of results in a form which is accessible to mine. Erarslan dumlupinar university, department of mining engineering, 43100, kutahya, turkey abstract. Computer aided evaluation of a magnesite ore body k. The particles identified in terms of their constituents are then ranked on the basis of their composition by weight. It teaches the basics of constructing a volumetric model, deriving volumes with cutfill, converting raster. Fractal relationships and spatial distribution of ore body. Pdf ore body modelling concepts and techniques pranav. Advances in orebody modelling and strategic mine planning. Features a 2in1 hybrid modeling kernel that is capable of modeling any types and shapes of deposits with either explicit inverse distance and kriging or implicit modeling rbf methods. Implicit modelling, using a variety of interpolation algorithms, will generate the required 3d solid with much less input from the user.
A fundamental requirement for mine design and planning operations is the development of an orebody model. A brief outlines on the techniques of ore body modelling, including reserve estimation and other techniques using geostatistics. On the othe r hand, grade value is the thicknessweighted average hustrulid and kuchta, 2006. Conditional simulation algorithms for modelling orebody uncertainty. Ore body models are computerized representations of portions of the earths crust based on geological and. Integrating the disciplines of geology, mining and metallurgy, our geometallurgical modelling solution helps you to develop proactive operating strategies from mine to plant as a function of. Surfacebased dynamic anisotropic interpolation technology avoids the common pitfall of oversmoothing in resource estimation.
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