Keywords: Modeling of deposit, Open Pit optimization, Ant ... Figure 4 Lenticular shape iron ore deposit of ... land is excavated forming pi ts which increase gradually u ntil mining process if .
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The mining value chain— which includes everything from extracting raw material to delivering products to customers—is the backbone of the industry. Companies that manage their value chain well can establish a significant source of competitive advantage and value creation. By contrast, those that neglect their value chain are likely to ...
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This model, based on exploration and drillhole data, must capture the structure of the ore and provide accurate economic, metallurgical, grade and geotechnical that allow mining engineers to establish the economic potential of the body and the viability of mining the ore body.
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(264).An application for the conversion to a new order mining right will be submitted during F2008. The Gloria mining lease (ML11/83) comprises an area of 1 hectares and is located on portion 1 of the farm Gloria (266). An application for the conversion to a new order mining right will be submitted during F2008. GEOLOGY
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Since the initial application of mathematical optimization methods to mine planning in 1965, the LerchsGrossmann algorithm for computing the ultimate pit limit is an exact method of determining the "ultimate pit." The extraction schedule is then defined by excavating these nested pits, in order, from smallest to largest pit [ 3 ].
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The profit function can also be formulated in unit values (per ton or cubic meter of ore), by assigning a unit profit function L ′ (/h), which is given by (2) L ′ = T U V − M − E R − B − F P. In all these variables, there are two geological characteristics, which have great importance: the stripping ratio R and the grade of ore is therefore essential to determine what their ...
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The open pit mining load and haul system has been a mainstay of the mining industry for many years. While machines have increased in size and scale and automation has become an important development, there have been few innovations to the actual load and haul process itself in recent times. This research highlights some of the potential productivity and safety benefits that the incorporation ...
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Most iron ore mining operations use the 'open pit' method, where miners drill into the rock and blast the orebearing material loose with explosives. Huge excavators are then used to gather the loosened ore. To mine metallurgical coal, which will later be turned into coke, it's usually necessary to sink vertical mine shafts to access coal which is deposited in layers or 'seams ...
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In openpit mining, in order to extract an ore block, it is necessary to remove all waste blocks with a variable slope angle up to the surface. The final combination of all ore blocks together with all waste blocks necessary to reach them that give maximum economic value is called UPL. Many studies have been carried out to determine UPL.
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Geological and economic modeling of an ore body and also optimization of the depth at which transition is made from openpit to underground mining is an important part of the mining design process in large and massive deposits. In this paper, a geological block model of ChahGaz iron ore deposit located in was first created based on iron ore cutoff grade. Then with considering the ...
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Rock slope failure has the potential to cause multiple fatalities in open pit coal, iron ore, base and precious metals mining operations. Rigorous geotechnical design, inspection and monitoring ...
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Openpit mining Openpit mining is a type of strip mining in which the ore deposit extends very deep in the ground, necessitating the removal of layer upon layer of overburden and ore. In many cases, logging of trees and clearcutting or burning of vegetation above the ore deposit may precede removal of the overburden. The
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In the production process of openpit mines, trucks are applied in the production process of openpit mines for transporting ores and rocks. Most openpit mines are equipped with dozens of trucks. It is important to plan the dispatch of trucks in the production process so that the transportation process can be the shortest in distance, the lowest in cost, and the most efficient. At present ...
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Therefore, new methods for dump design optimization are of the highest priority in mine planning management. This paper presents a methodology to model and optimize the design of a mine dump by minimizing the total haulage costs. The proposed methodology consists of: (1) formulation of a dump model; (2) solves by using linear programming and ...
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Selecting reasonable blasting parameters of ore and rock is an important measure to achieve good blasting effect. In the mining process, rock fragmentation is an important index to evaluate the blasting effect, which directly affects the technical scheme, equipment selection, economic effect, and other issues of the mine and even seriously threatens the sustainable safety production of the mine.
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The stability of high jointed slopes has an important impact on the construction of engineering projects. Herein, aiming at the high jointed slope of mine, by combining the jointed finite element method (JFEM) and the discontinuous deformation analysis (DDA) method, a wholeofprocess analysis method was proposed from identification of the slope stability and risk assessment to later ...
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Mining activities affect environment, economic and society in its surrounding region. This study aims to assess the sustainability of SorkheDizaj openpit iron ore mine which is located 300 km in northwest of Tehrancapital of . The annual ore production of SorkheDizaj openpit mine is 400,000 tonne, extracted an area of Km 2. In ...
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Openpit mine: Chuquicamata copper mine, Región de Antofagas ta, Chile L oc al it y : R eg ió n d e An t of ag as t a, C h ile. Pit dimensions : km long x 3 km wide x 850 m deep.
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Introduction. This paper discusses a geotechnical study and a slope design of a proposed 170 m deep leadzinc opencast mine situated in Rajasthan state, India. The open pit is 1,500 m long and 500 m wide. The ore body has been proved for a length of km and to have 60 million tonnes of ore reserve. As the ore body is steeply dipping, the ...
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It is common in mining industry that the deposits contain multiple correlated attributes of interest. A typical example is iron ore mining, where up to six variables need to be considered in resource estimation and mine planning, namely iron (Fe), silica (SiO 2), alumina (Al 2 O 3), phosphor (P), loss on ignition (LOI) and Ochreous Goethite (GOL), and they are crosscorrelated.
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An openpit mine bulk materials handling system case study is presented to demonstrate the approach. A dispatching heuristic controlling the operation of the trucking system can be optimised through the selection of values for four control parameters. ... some background knowledge of the process of openpit mining is necessary. The purpose of ...
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Technology Coal mining S Shoniza Irfan Recommended Basics of openpit mining SATYANARAYANA I views • 26 slides Topic 5: Mining MethodsPart ISurface mining Geology Department, Faculty of Science, Tanta University views • 75 slides Mining Methods VR M views • 78 slides
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The scheduling of openpit mine production is a largescale, mixedinteger linear programming problem that is computationally expensive. The purpose of this study is to create a computationally efficient algorithm for solving openpit production scheduling problems with uncertain geological parameters. To demonstrate the effectiveness of the proposed research, a case study of an Indian iron ...
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Hochbaum and Chen A. (2000): Performance Analysis and Best Implementations of Old and New Algorithms for the OpenPit Mining Problem, Operations Research, pp 894914. Johnson (1968): Optimum Open Pit Mine Production Scheduling, Operations Research Center, Dissertation submitted to University of California, Berkeley, 131p.
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The developed model is tested in the GoleGohar ironore mine, and the mine UPLs is determined. ... the development process of openpit mine slope engineering in China can be divided into ...
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7. Digging Capacity of Shovel No. Description Value 1. bucket size m3 2. fill factor for well blasted rock = 80% 3. average bucket capacity = x m3 4. swing time second 28 5. passes per minute, continuous operation 60/28 6. cubic metre per hour continuous x 60/28 x 60 787 7. swell factor 67% 8 ...
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Cost decreased at an optimum fragmentation size in the surface mining operation and production [7,8].The back bone of the blast results quality in surface mining is the efficiency and cost of ...
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Blasting 1 m 3 ore rock needs consumption of m 3. dust removal technology is mostly used in areas with hot climates and water deficient. The dust reduction efficiency of covering the blast area with is up to %, and the ventilation time of openpit mines can be reduced by 2/33/4.
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The utilization of mining area in the Leeuwfontein pit improved from 71% to 90%, and the blasting frequency reduced by 14% while the average blast size increased by 17%. The distance travelled during shovel relocations between mining phases reduced by 16%, and the lost time associated with drills relocating reduced by 53%.
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Openpit mining technology. Openpit mining clearly offers a number of economic advantages over underground mining, especially now that mineralprocessing technology has advanced to the stage where very lowgrade ores can be treated profitably. 100 to 150 years ago, this was not the case, and mining was still much more selective.
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In an open pit mining operation, the heterogeneity of the gradetonnage distribution of the deposit dictates that all available material within the boundaries of an open pit may not be processed.
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Open pit mining method is one of the surface mining methods that has a traditional coneshaped excavation and is usually employed to exploit a nearsurface, nonselective and lowgrade zones deposits. It often results in high productivity and requires large capital investments, low operating costs, and good safety conditions.
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Blasting performance is influenced by mechanical and structural properties of the rock, on one side, and blast design parameters on the other. This paper describes a new methodology to assess rock mass quality from drillmonitoring data to guide blasting in open pit operations. Principal component analysis has been used to combine measurement while drilling (MWD) information from two drill ...
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The stability of slopes in open pit mines is an issue of great concern because of the significant detrimental consequences instabilities can have. To ensure the safe and continuous economic ...
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