methods of calculating tonnage in mining

  • Increasing Production Time in Continuous Mining Methods

    for modification. In the 14 months, 786 361 tons of coal were produced, the worst month being 24 288 tons and the best month 66 021 tons. The average tonnage per month was 56 169 tons on a two shift basis. The modifications to the machine were done to simplify the hydraulics and reduce the difficulty experienced when maintaining or repairing the machine.

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  • ESTIMATION OF MINERAL RESOURCES And MINERAL RESERVES

    Nov 23, 2003anticipated mining and grade control methods and size and type of equipment. In block modeling, the size of the blocks in the model will be chosen to best match mining selectivity and the anticipated grade control method, sample density and sample statistics. In the case of computer based modeling, the QP responsible

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  • Cost Models of Theoretical Mining Operations

    Each of the models is developed from first principles based on typical mining criteria for rock densities, swell factors, drill penetration rates, etc. Industry-standard estimating methods are used for equipment selection, personnel allocation, and cost estimation. These models are invaluable for early order- of-magnitude estimates.

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  • Mining Flashcards

    Mining. Today, a more common method of disposal involves storing tailings in surface depressions in the ground away from streams. Once the storage site is full, it is capped with topsoil and revegetated. However, care must be taken to ensure that materials in the covered site do not leak into groundwater.

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  • Mineral Deposit Value

    Mineral Deposit Value – How to Calculate the Potential Value of a Mining Project. This required data can be found in the mining company's press releases in which they announce their drill results. Make sure that this data is announced according to the guidelines of National Instrument 43-101 (i.e. approved by a Qualified Person) or similar international reporting standard.

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  • methods of calculating tonnage in mining

    Other cruder methods have to be applied to arrive at approximate estimates of grade and tonnage or potential grade and tonnage. Many exploration projects have a Vertical section to calculate the true thickness of a drill intersection . simplified economic calculations that the grades during each mining

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  • Variable components of the Mine Call Factor from a surface

    1 Variable components of the Mine Call Factor from a surface mine perspective using AngloGold Ashanti Iduapriem Mine as a case study M.N.M Tetteh1, F.T Cawood2 1School of Mining Engineering, University of the Witwatersrand, Johannesburg, South Africa, [email protected]

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  • Room and pillar mining

    Room and pillar mining was one of the earliest methods used, although with significantly more man-power. The room and pillar system is used in mining coal, gypsum, iron, and uranium ores, particularly when found as manto or blanket deposits, stone and aggregates, talc, soda ash and potash.

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  • Topic 5: Mining Methods

    Nov 02, 2011i) Hydraulic Mining (or Hydraulic king) 2 February 2016 Prof. Dr. H.Z. Harraz Presentation Mining Methods, Surface mining Hydraulic Mining involves directing a high- pressure stream of water, via a MONITOR or nozzle, against the base of the placer bank. The water caves the bank, disintegrates the ground and washes the material to and through sluice boxes, and / or jigs, and / or tables situated

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  • Surface Mining Methods and Equipment

    appropriate mining method is selected based on technical, economic, and environmentally accountable considerations. The first step in selecting the most appropriate mining method is to compare the economic efficiency of extraction of the deposit by surface and underground mining methods . This section reviews surface mining methods and practices. 1.1.

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  • Applications of Queuing Theory for Open

    Applications of Queuing Theory for Open-Pit Truck/Shovel Haulage Systems Meredith Augusta May Abstract Surface mining is the most common mining method worldwide, and open pit mining accounts for more than 60% of all surface output. Haulage costs account for as much as 60% of the total

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  • Applications of Queuing Theory for Open

    tonnage required by the tons per truck per hour, based on the calculated productive capacity (Burton, 1975). This method does not provide an accurate model of truck-shovel systems, but it does provide a rough estimation of the number of trucks required to meet production needs.

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  • Coal Calculations

    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

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  • Underground mining of thick coal seams

    This paper reviews underground mining methods for total thickness of a thick coal seam in single lift (TTTCSSL). Review shows the required engineering for extraction of thick seams needs to be fitted with thickness of the seam, behavior of rock-mass and surrounding stress conditions for efficient mining.

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  • Stripping ratio

    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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  • methods of calculating tonnage in mining

    Methods Of Calculating Tonnage In Mining - korhoender. Methods Of Calculating Tonnage In Mining Volume calculations are very important in mining to not only estimate the efficiency of machines and mining methods, Bottom surface used for volume calculation. Get Price. Mine Surveyor - Volume Calculations (Open-cut Mine

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  • 2012 Americas School of Mines

    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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  • Underground Mine Design

    Underground Mine Design, Planning and Engineering Maximize your ore reserve value by using our operating expertise to customize your mining plan We have years of first-hand underground mine engineering and operating experience in most countries and across multiple commodities using all common mining methods.

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  • Valuation of a mining company

    Sep 03, 2011Valuation of a mining company. The more common discounted cash flows (DCF) method cannot be used to value a natural resource company because the basic assumption behind DCF valuation is that the underlying asset or firm would generate income indefinitely and there will be a terminal value associated with the same.

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  • Grade and tonnage model of Placer Au

    Some tonnage figures were estimated from approximate size of workings. Some grades were based on very limited information and in some cases extrapolated from information on manpower figures, type of equipment used, and estimates of the total contained gold produced. Cutoff grades are dependent on the mining methods used to exploit placers.

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  • Economic Feasibility Study

    to as copper ore. There are two basic methods of mining the copper ore: surface or open-pit mining and underground mining. Open-pit mining is the predominant mining method used throughout the world. Determining the mining method depends on many factors such as

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  • Mine Valuation

    second method. The following table of the weights per cubic foot and the number of cubic feet per ton of some of the principal ore-forming 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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  • Tonnage

    7. Applications of the tonnage-cutoff model and average grade-cutoff model. These models not only display the relationships between the mineralized zone mass, ore reserve, average grade and cutoff, but also provide a new method for calculating the mineralized zone mass, ore reserve and average grade.

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  • Methods for calculating the minimum amortization tonnage

    Methods for calculating the minimum amortization tonnage and maximum present value for an ore body Part of theMining Engineering Commons Department: Mining and Nuclear Engineering This Thesis - Open Access is brought to you for free and open access by Scholars' Mine. Methods for calculating the minimum amortization tonnage and maximum

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  • ORE RESERVE ESTIMATION

    is compared with the tonnage and quality of coal actually mined. The three estimation techniques compared were: 1rc1-ygon; inver se-di s tance- squared weighting; and kriging. The coal reserve was first esti-mated using diamond drill hole data available prior

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  • SCREEN CAPACITY CALCULATION

    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 1.0 .

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  • Calculation of Subsidence for Room and Pillar and

    longwall panel mining of coal deposit is presented. The article focuses on the Knothe' method, that describes the subsidence trough by the Gauss influence function method. This method provides calculation of tilt, curvature radius, horizontal and vert ical movements, and horizont al strain of the surface subsidence trough.

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  • Taking the Measure of Methods for Estimating Earthwork Volumes

    Aug 08, 2016The Grid Method (also known as the Borrow Pit Method) extends DAM to an excavation of varying depths. Borrow-pit leveling calculates the excavation volume by applying a grid to the excavation area. The grids can be staked to squares of 10, 20, 50, 100, or more feet depending on the project size and the accuracy desired.

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  • Dilution and ore recovery

    Mine dilution occurs due to the mining method selected and from overbreak during the mining process. There are multiple considerations in terms of dilution. Mining methods such as block caving, sublevel stoping and room-and-pillar have mining methods which are more predictable, where dilution can be modeled using empirically generated equations.

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  • Carlson Software

    Calculate end-of-month tonnage on each section in one of three ways with Quantities, either by: Average, Grid, or Centerline; Use the full array of mining symbols from the Mine Symbol Library, or build your own library of mining symbols, pillaring

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