بيت /methods of calculating tonnage in mining
the importance of dilution factor for open pit mining projects. Financial models calculate revenues by using tonnage and grade of ore which is .. Factors that are related to mine operation comprise the mining method, mine. Live Chat
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For the calculation of the volume and the tonnage of ore deposits there is a variety of available methods to choose from, each suited for a particular deposit. These methods fall into two categories: reserve calculation on the basis of crosssections and on the basis of longitudinal planar sections or level plans respectively.
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Step IV Calculate the mining cost at each site (you do not need to convert to pounds for this step) # of tons of ore at Site x per ton = mining cost Step V Calculate the profitability Price of copper – mining cost – reclamation cost – any other noted expenses = profit at mining site Mining .
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The mining methods used depends on the physical and chemical properties of the mineral, tonnage and grade, the physical form in which it occurs, the geometry and the depth of the orebody. The common extraction methods are surface (or open pit) mining and subsurface (or underground) mining, or a combination of both.
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A new iron ore deposit is to be worked by surface mining methods with 15 m benches using 150 mm diameter blastholes. Since the prevailing condition is dry rock, it has been decided to use bulk ANFO with emulsion cartridges as primer. Assume that the overall density of compacted ANFO and the primer as g/cm3 and the powder factor of kg/m3. Find the appropriate burden and spacing for .
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roomandpillar method of mining. A prerequisite for a safe working environment is that the pillars should adequately support the overburden and the pillar ribs and rooms should remain stable during mining. At present pillar dimensions are either based on .
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Mining this narrow style of mineralization can be considered as relatively high risk, not only due to the high cost of exploration and mining per unit of metal, but also to the frequently limited size of the resource. Estimation of the Mineral Resources and their location can be difficult.
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Under the units of production method, the machine's depreciable cost of 480,000 (500,000 minus 20,000) is divided by 240,000 units, resulting in depreciation of 2 per unit. If the machine produces 10,000 parts in the first year, the depreciation for the year will be 20,000 (2 x 10,000 units).
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Mining Coal Calculations. These calculations are used to calculate various skeleton parameters including ash and calorific value that let you determine the grades of your coal. SGS global teams of chemists and experts use a range of coal analytical calculations and indexes to arrive at the calorific values, total hydrogen,...
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There are two basic methods for calculating cut and fill construction projects by hand. The first is called the grid method. In the grid method, you divide your plan up into a set at equally sized grid squares and then determine the cut or fill volume for each individual grid cell.
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The stability graph method provides a rough estimation for designing stope excavations, and should only be used as a guideline in determining stope size and required ground support. In the early stages of a project the rockmass is never well defined, and so a range of input values should be used in determining, N', for a more robust stope design.
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Method Detection Limit (MDL) is the minimum concentration of a substance that can be measured and reported with 99% confidence that the analyte concentration is greater than zero, and is determined from analysis of a sample in a given matrix containing the analyte. Appendix A contains the necessary equations for calculating method detection limits.
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Each of the models is developed from first principles based on typical mining criteria for rock densities, swell factors, drill penetration rates, etc. Industrystandard estimating methods are used for equipment selection, personnel allocation, and cost estimation. These models are invaluable for early order ofmagnitude estimates.
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Underground Mining. The length of the longwall block is about 3,000 meters to 5,000 meters. In a 3 meter thick coal seam the amount of coal in place in a block is six to seven million tons. The basic equipment is a shearer (a cutting machine) mounted on a steel conveyor that .
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In mining, stripping ratio or strip ratio refers to the ratio of the volume of overburden (or waste material) required to be handled in order to extract some tonnage of ore. For example, a 3:1 stripping ratio means that mining one tonne of ore will require mining three tonnes of waste rock.
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Statistical testing methods: consists of comparing evidence against null hypothesis. An example is the gap statistic. In addition to elbow, silhouette and gap statistic methods, there are more than thirty other indices and methods that have been published for identifying the optimal number of clusters. We'll provide R codes for computing all these 30 indices in order to decide the best number of clusters .
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2012 Americas School of Mines W Scott Dunbar University of British Columbia • Basics of Mining and Mineral Processing. Agenda Geological Concepts Mining Methods Mineral Processing Methods Mine Waste Management Mining and Money A Future of Mining. PwCPwC ... K tons grade g recovery r = 1 ton grade G
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second method. The following table of the weights per cubic foot and the number of cubic feet per ton of some of the principal oreforming minerals and gangue rocks will be useful for approximating the weight of a cubic foot of ore by the third method. Weights are in pounds avoirdupois, and two thousand pounds are reckoned to the ton.
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A method is presented to calculate the cost of uncertainty in a production schedule based on deviations from the target production.
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GeoE 498 2010 Introduction to Mining and Mineral Processing Engineering Note You must receive a grade of 50% or higher in at least one of the midterm or final exams in order to achieve a passing grade in this course. All assigned work is mandatory. Failure to attend or complete any of the ... zNumerous mining methods
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Mar 29, 2014· Mining ppt 2014 1. Presented by : Ajoy Saikia Department of Earth Environmental Science KSKV KACHCHH 2. Mining is the process of extracting minerals like gold, silver, copper, nickel and uranium (metallic) and salt, potash, coal and oil (nonmetallic) formations that concentrate naturally in the earth. 3.
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is less than half the size of the wirecloth opening. The higher the percentage of small feed material the greater the screen capacity. The faster the material passes through a screen the more open area there is left to screen the remaining material. A feed material with 40% of the feed being half the opening size or smaller equates to a factor of .
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In the table, below, is a basic sampling equation that relates particle size to the amount of sample to be taken, with constants derrived for varions types of ore bodies. The values for "M" are the sample size required in pounds. Tha values of k are the constant derrived for .
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Nov 23, 2003· These guidelines have been prepared by the Canadian Institute of Mining and Metallurgy and Petroleum (CIM) led "Estimation Best Practices Committee". They are intended to assist the Qualified Person(s) (QP) in the planning, supervision, preparation and reporting of Mineral Resource and Mineral Reserve (MRMR) estimates.
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length along exploration or mining works, the tonnagecutoff and average gradecutoff models are constructed, which are applicable in both exploration and operating mine environments. Via these models, the relationships between ore tonnage, metal tonnage and cutoff are obtained in terms of the fractal model of element concentrations.
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