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formular for calculating strip ratio in mining



  • Coordinating Mining Optimization Research on Mining , - EJGE

    while each coal field is divided into several mine fields to reduce initial stripping ratio and capital construction , determining the pit limits and mining districts scope , Taking a derivative of Bmax with respect toΔH, the formula can be got as: 2

  • stripping ratio | mining | Encyclopedia Britannica

    ,great depths that it becomes uneconomical to continue with surface mining The point where it becomes economically necessary to switch from one method to the other can be calculated with the aid of stripping ratios

  • Abacus Mining & Exploration Corp - Ajax - Sun Mar 8, 2015

    Total proven & probable mineral reserves of 503 Mt grading 027% Cu and 017 g/t Au (037% Cu , 23 year mine life at a processing rate of 60,000 t/d or 219 million t/a at a LOM stripping ratio of 24:1; LOM production , Copper equivalency was calculated using the formula CuEq = ([(%Cu) x (CuRec) x (220462) x ($lbCu) + (g/t/Au) x (AuRec) x (1/311035) x ($ozAu)]) ÷ ((CuRec) x (220462) x ($lbCu)))

  • Formula: Enchant Gloves - Advanced Mining - Item - World of Warcraft

    This enchanting formula is used for the Enchanting profession It is looted from Venture Co Strip Miner

  • Stripping ratio Definition – Resource/Mining Dictionary

    The stripping ratio refers to the amount of waste rock viz ore (as opposed to mineralization) In the first bench of an open pit mine, the ratio will be higher (because of the overburden) but should improve with depth A 3:1 stripping ratio means.

  • CreditRiskMonitor Glossary

    Number of Mines; Remaining Mine Life -Years; Developed Acreage - Mining; Developed Square Kilometers - Mining; Average Production per Mine (Long , Average Production per Mine (US Tons), Total; Stripping Ratio - %; Stripping Ratio, Total - %; Undeveloped Acreage - Mining; Undeveloped Square , The formula for calculating free cash flow is Operating Cash Flow (OCF) - Capital Expenditur

  • 16 Computer Aided Ore Body Modelling and Mine Valuation - InTech

    Mine valuation can be defined as the process of determining the worth of a specific mineral deposit and capability , Parameters, such as thickness and grade carried by sample points, are used in the formula and variance value is , be calculated to find stripping ratio (Taylor, 1991) intechopen.

  • Open-File Report 03-143

    Line drawing of mine waste base area for selected ore tonnages and stripping ratios at 50-meter height and ,, The following equation shows the method for calculating the compacted waste density, in metric tons: Waste density = In-situ.

  • First Impressions: Production stripping costs - KPMG

    62 Formula-based allocation between inventory and stripping asset may be required , capitalise costs, often using an average life-of-mine stripping ratio approach, while others expense such costs as incurred, or follow the

  • Open Cut Coal Solutions - Mining & Engineering Indonesia

    The tools simplify the task of creating a mining and dumping schedule and reporting the results through a process driven , Build grids using data or the Microsoft Excel style formula , One-step process for calculating strip ratio (requires less

  • Mining for diamonds worldwide - SRK Consulting

    of Southern Africa and Australia: these are the locations of today's diamond min 1 Mining for diamonds , high stripping ratios and therefore result in generation of large volumes of waste , taken into the equation Jarek Jakubec and Mike.

  • Economic Surface Mining of Multiple Seams - saimm

    marginal, short- and long-range decision-making regarding muIliple-scam surface mining becomes more difficult The d~cision-making problem involves !l study of economics, cut-off grades and ratios, equipment capabilities, l>«Iucncing and , cost calculations and the determination of tho di~countc:d cash !low retl1rn on investment , The basic formulae used for these calculations are as follows:

  • Relationship between surface subsidence factor and mining depth ,

    Abstract: Strip pillar mining is one of the most important technical measures to control mining subsidence in China Mining depth , The formula was established based on the simulated , ratio (ρ), mining method and roof management method.

  • Grand Mines (Pty) Ltd v Giddey NO (183/97) [1998] ZASCA 99; 1999 ,

    mine The above rate was calculated as follows: a) Ratio of not more than 2:1 (2M3 overburden to 1 ton of coal) , "5122 Rehabilitation of the surface at any opencast mine shall form an integral part of the mining operations and , formula correlating mining and delivery of coal with payment there was

  • determination of ultimate pit limits in open mines using real option ,

    consequence in the whole planning and design procedure of an open pit mine is the metal price Metal price , Break-Even Stripping Ratio (BESR) Systematic studies on , Stochastic Differential Equation (SDE) of P P P Pdz Pdt dP σ α +

  • Modelling of transportation costs for alternative Life-Of-Mine plans of ,

    of geological data and mine developments (including enhanced surface rendering and the virtual reality tools) are of great value for both , other price formula) and – often the most difficult – the accuracy of spatial distribution of mining costs

  • Chapter 6: Geometry of Aerial Photographs - GIS-Lab

    Representative fraction is expressed as a ratio in the form of 1:2400, where one unit on the , The derivation of photo scale (sp) with Equation 61 is a ratio which serves the purpose , photographs along a flight strip , for Mining Applications"

  • Mineral Resource & Reserve - Abacus Mining & Exploration Corp

    Mineral Resource Mineral Resources take into account geologic, mining, processing and economic constraints, and have been confined within , Copper equivalency was calculated using the formula CuEq = ([(%Cu) x (CuRec) x (220462) x ($lbCu) + (g/t/Au) x (AuRec) x , The life of mine, waste to ore strip ratio is 240

  • Carmen copper-gold deposit, Chile - PanAust

    The combined Measured, Indicated and Inferred Mineral Resource estimate for Carmen is 458 million tonnes at , (through a higher contained metal value and potentially lower strip ratio and process costs) , Formula for calculation of copper equivalence for precious metals (gold and silver) Copper.

  • Accounting for stripping costs in the production phase - IFRS

    3 The average tonnage of waste required to produce a ton of ore in surface mining is approximately 26, compared to 007 for , (using the same formula as the average strip ratio) calculate an actual strip ratio of waste removed in the period.

  • How do you calculate the stripping ratio - Answers

    We divide the overburden thickness by ore thickness to get the stripping ratio For example if we have an overburden , It's a ratio of waste extracted at a mine and is expressed as: (Total extracted - Mineral for plant) / Mineral for plant -m0

  • Group note 1 - Annual reports 2013 | AngloGold Ashanti

    The group expects IFRIC 20 to have an impact as a consequence of moving from a life-of-mine strip ratio to a strip ratio ,, The group recognises a liability and an expense for bonuses and profit-sharing, based on a formula that takes into.

  • brockmanmining - Brockman Mining Limited >Our Business ,

    CaFe represents calcined Fe and is calculated by Brockman using the formula CaFe = Fe% / ((100-LOI)/100) As part of the , For this reason, it is expected that the stripping ratios will be low and that mining will be relatively straightforward

  • Stripping Ratios, Pit Limits & Cutoff Grade Optimization ,

    In strip coal mining operations, the following are sometimes seen: (ft) Thickness Coal (ft) Thickness Overbuden SR = (tons) Coal ) (yd , Break-even stripping ratio Typical Calculation Process • Find Costs, Ore Grades, Recoveries • Calculate Gross Recoverable Ore , f f a a Cutoff Grade Optimization Determination Of Optimum Cutoff Grades When The Mill Is Bottleneck 32 Formula for Optimum Cutoff.

  • Download PDF - Springer

    in the course of open pit mining is diluted by 20% barren waste, ie to extract the , The calculation of the marginal stripping ratio is therefore based on open pit , It becomes evident that Eq 102 is the equation of a line with three unknowns.

  • IC-MinEval User Manual - EduMine

    differing mining methods enable different options including stripping ratio for underground and specific costs information For this , Selecting Open Pit allows you to use the O'Hara formula to calculate the Op-Costs of a gold project in Costs.

  • MINSIM - Ministry of Energy and Mines

    The value of the mine thus calculated is termed the "net present value" (NPV) The generalized formula i s : , n AJ NPV = , Stripping Ratio 3 Recovery (Metallurgy) 3 Milling Capacity 4 Operating Costs 4 Discount Rate 5 Tax Rat 5

  • P4 Surface Mineability and Grade Controlpdf - University of Ilorin

    The stripping ratios and the surface mincability factors were used to determine the depth to which open pit mining could be , ltakpe iron ore deposit is calculated using the above formula and the results are shown in Table 2 Table 2

  • Magnesium - Mineral Fact Sheets - Australian Mines Atlas

    Magnesium also occurs in dolomite, which has the formula CaMg(CO3)2 and in which MgCO3 constitutes 4565% (equivalent to 217% MgO) , During mining the strip ratio, that is, the quantity of magnesite ore to waste material, may be high

  • Coal Reserve Assessment and Database , - Indiana University

    Calculation of Depleted Resources: Data Sources and Mapping Procedures , Formula for calculating stripping ratio , Figure 3 Map of southwestern Indiana showing the distribution of surface and underground mines, (active and.


    formula or discount method): present , calculate the tonnage and grade, or richness, of the mineral deposit He or she estimates the mining , determine the stripping ratio, the ratio of waste removed to ore recovered; it may range from as high.

  • Standardized emissions inventory methodology for open pit mining ,

    a stripping ratio of 398 emitted 93667 kg/day of TSP while its production was 2500 t/day ie 374 Kg of TSP per Mg of coal , used in equation 3 for applications where the material moisture content exceeds 48% If the wind speed is greater

  • Estimating Average Total Cost of Open Pit Coal Mines in , - InfoMine

    High stripping ratio, seams with complex metallurgy characteristics, mines located in isolated regions, bad climate, , The main shortcoming of O'Hara's estimation relates to the expansion of Equation 1 over the mining project life; however,.

  • Lecture 4 Calculating Stripping Ratios for Area Strip Minppt

    Calculating Stripping Ratios for Area Strip Mines Mnge 315 , Note – These notes contain information considered common knowledge to those familiar with Strip Mining Books such as , The Coal Area Strip Mine Formula Strip Ratio = OB.

  • Surface Strip Coal Mining Handbook - sacea

    Introduction This handbook on surface strip coal mining serves as a general introduction to the subject of , The revenue portion of the equation can be written as; , Usually the first analysis is the calculation of a stripping ratio at which


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