stripping ratio of al mine

  • Hartman, Introductory Mining Engineering, Thomas, An …

    • The best explored and largest deposit is at Al Jalamid, which has measured reserves of 213 Mt averaging 21% P 2O 5 and a stripping ratio of 2.3:1. Indicated resources amount to a further 187 Mt, 19.7% P 2O 5, stripping ratios 5:1 or less • The Umm Wu''al 2O

  • Surface mining planning and design of open pit mining

     · Surface mining planning and design of open pit mining 1. This material is intended for use in lectures, presentations and as handouts to students, and is provided in Power point format so as to allow customization for the individual needs of course instructors.

  • Mine Plan

    Surface mine design is determined by the stripping ratio, the overall shape of the reserve from a plan view, and the type of rock. Three main surface methods are utilized, with each having the same common steps of overburden removal, coal seam removal, and reclamation.

  • 2 surface mine planning

     · Pit Planning & Design Long-range mine planning Maximum allowable stripping ratio (break-even ratio) establishes pit limits Ratio of overburden to ore at the ultimate boundary of the pit where the profit margin is zero Value of ore in ($/ton) is the recoverable

  • Surface Mining Techniques used in the Oil Sands | Oil …

     · STEP 6. MINE OUT THE OIL SANDS AND FOLLOW THE MINE PLAN. Once mining progresses, a typical mine will have several mine faces exposed and several shovels in operation. This allows for ore blending and produces more "normalized" feedstock for the Bitumen Production facility, with less variability in feed quality.

  • stripping ratio calculation in mining

    The units for stripping ratios can vary and usually depends on the geological properties of the deposit and the commodity mined It can be expressed in tonnes (t) or cubic meters (m 3) Usually for coal cubic meters (m 3) or tonnes (t) are used However for hard rock mines where the geology is usually complex with the presence of various rock types tonnage (t) is usually preferred

  • IFRIC 20, policy for deferred stripping costs, mining, …

    Stripping costs for the component are deferred to the extent that the current period ratio exceeds the life of component ratio. The stripping activity asset is depreciated on a "units of production" basis based on expected production of either ore or minerals contained in the ore over the life of the component unless another method is more appropriate.

  • mining engineering: STRIPPING RATIO (S)

     · SR measures the amount of waste that needs to be removed to get an amount of ore, just as we mine it. Note the "amount"! b. This will differ depending on time span under consideration. * Initial studies (feasibility) – overall stripping ratio. * Current month – incremental stripping ratio.

  • i) Mechanical excavation methods; such as Open-pit and Strip …

    Stripping Ratio Stripping ratio refers to the amount of waste rock removed to recover ore. For example, a stripping ratio of 3:1 means to recover one ton of ore you must remove three tons of waste rock. A large Stripping Ratio is less economical efficient

  • LAND DEGRADATION DUE TO MINING AND ITS REMEDIAL …

    The ratio of overburden excavated to the amount of mineral removed is called the stripping ratio. For example a stripping ratio of 4:1 means that 4 tonnes of waste rock are removed to extract one tonne of ore. Lower the ratio, the more productive the mine

  • GOTITORIA EAST & WEST MINE

    Mine Plan Extraction Rate 0.3 MTPA Average Stripping Ratio 6.5-7 Mining Agency BLA Industries Pvt Ltd 3. Status of Clearances/Approvals Mining Plan(Reference to Grant) No. 13016/1/1996-CA-I (Vol.IV) Forest Clearance(Reference to Grant) No. 8-54

  • CAS-23 COST ACCOUNTING STANDARD ON OVERBURDEN REMOVAL COST …

    from the mine site. 4.14 Ratio Variance: It is the variance between current ratio and standard /average stripping ratio in terms of quantity of mineral produced during the period. 4.15 Repair and Maintenance Cost: Cost of all activities which have the objective of

  • Determining Stripping Ratio

     · = 0.29 = 0.3 is the maximum allowable stripping ratio for break even This mean the income generated by one unit of 0.6% graded copper is able to offset the cost of 3 units waste at no profit (Income = Cost). Feel free to comment so that i can improve on the materials on this blog. Follow, like and share if you find this information useful.

  • Determining the different cut-off grades in a mine

     · In mine planning process, the cut-off grade is determined prior to producing the reserve physicals. The different cut-off grades are the break-even cut-off grade (BECOG), incremental cut-off grade (ICOG), mill cut-off grade (MCOG), and resource cut-off grade (RCOG).

  • Stripping Costs in the Production Phase of a Surface Mine

    4 The material removed when stripping in the production phase will not necessarily be 100 per cent waste; often it will be a combination of ore and waste. The ratio of ore to waste can range from uneconomic low grade to profitable high grade. Removal of material

  • Understanding Iron Ores and Mining of Iron Ore – IspatGuru

     · The economic stripping ratio varies widely from mine to mine, depending upon a number of factors. In the case of direct shipping ores, it may be as high as 6:1 or 7:1. In the case of low grade ore, a stripping ratio of less than 1.5:1 is often considered as an economic limit.

  • stripping ratio

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  • SURFACE MINING – Mining Engineering Site

     · Stripping ratio- The unit amount of overburden that must be removed to gain access to a similar unit amount of coal or mineral material. Stockpile-Broken ore accumulated in a heap on surface, pending treatment or shipment. Sump-The bottom of a shaft, or any

  • (PPT) Calculating Stripping Ratios for Area Strip Mines | …

    Calculating Stripping Ratios for Area Strip Mines Mnge 315 ©Dr. B. C. Paul spring 2003 revised 2010 Note – These notes contain information considered common knowledge to those familiar with Strip Mining. Books such as "Elements of Practical Coal Mining" and SME''s "Surface Mining" were specifically referenced fStripping Ratio as a ...

  • Easy profit maximization method for open-pit mining

     · In all these variables, there are two geological characteristics, which have great importance: the stripping ratio R and the grade of ore T. It is therefore essential to determine what their extreme values are which may lead to a zero profit.

  • Stripping ratio | mining | Britannica

     · Other articles where Stripping ratio is discussed: coal mining: Choosing a mining method: …calculated with the aid of stripping ratios, which represent the amount of waste material that must be removed to extract a given amount of coal. Stripping ratios can also consider the selling price of coal, and a certain minimum profit can be added to the total cost of producing and…

  • Chapter 2: The Environmental Effects of Strip Mining

    THE ENVIRONMENTAL EFFECTS OF STRIP MINING A ll mining operations have a disruptive effect on the environment, but the sheer volume of material involved in strip mining makes the impact on the environment especially acute. Surface mining (another name for "strip mining") can severely erode the soil or reduce its fertility; pollute waters or drain underground water reserves; scar or altar the ...

  • Study on the Economic Stripping Ratio in Oil Shale …

    The economic stripping ratio is an important basis to determine open pit limit. Since there is no national or occupational standard about economic stripping ratio in open-pit oil shale mine, the economic stripping ratio has calculated by adopting refined oil price. This research has guiding significance for oil shale open-pit mine exploitation.

  • Mining Terms

    Stripping Ratio: is the ratio of a unit of waste material removed per similar unit of ore material removed. Toe: is the base of a bank bench or a slope. Waste Dump: is a place were waste materials are piled. Important Terms for Underground Mining Adit: It does not ...

  • Analysis of Highwall Mining Stability

    unique to each mine site. This survey also found that the width-to-height (W/H) ratio of web pillars exceeded 1.00 in 75% of the cases examined. In general, keeping the web pillar W/H ratio above 1.00 is desirable to maintain web pillar integrity. Narrow web

  • A review of models and algorithms for strategic mining options …

    the stripping ratio typically increases, increasing the overall mining cost. As a result, companies ... to Roberts et al. (2013), optimization of an open pit mine in conjunction with an existing high production underground operation is more complex. This challenge is ...

  • ECONOMIC ASSESSMENT AND MINE PRODUCTION OPTIMIZATION OF AN OPEN-PIT GOLD MINE …

    In the economic evaluation, variables as the breakeven cutoff grade (BCOG), stripping ratio and optimal cutoff grade (OCOG) will be considered in order to determine the Net Present Value (NPV), Internal Rate of Return (IRR) and mine life.

  • IAS 16 — Accounting for stripping costs in the production …

     · IAS 16 — Accounting for stripping costs in the production phase of a surface mine. Date recorded: 05 Nov 2009. The IFRIC con­sid­ered a request to add to its agenda a project to clarify accounting treatment for stripping costs in the pro­duc­tion phase. An ed­u­ca­tional pre­sen­ta­tion was made by Niall Weath­er­stone, Chief ...

  • Coal Ratio

    To develop a mine, the break even stripping ratio (at the surface of the final pit) must be established. It is found from the formula: B = R − P / S Where B = breakeven stripping ratio (overburden per ton of coal) in meter 3, R = market price of coal per ton, P = ...

  • What Is a Stripping Ratio? (with picture)

    The stripping ratio is commonly used in the ore and coal mining processes. Stripping ratio is a term that is derived from the mining industry and is used in reference to the open-pit mining process. The stripping ratio method of calculating the profitability of the mining procedure is commonly used in the ore or coal mining process.

  • NRRI/TSR-2011/01

    Cover Photo Captions "Waste" (overburden through LC-5) to "Ore" (LC-4 and LC-3) ratio (stripping ratio) within area of interest (Zanko et al., 2003). Recommended Citation Zanko, L.M., 2011, Cost Comparison of Underground and Surface Mining Options for Potential ...

  • Stripping ratio

     · Other articles where Stripping ratio is discussed: coal mining: Choosing a mining method: …calculated with the aid of stripping ratios, which represent the amount of waste material that must be removed to extract a given amount of coal. Stripping ratios can also consider the selling price of coal, and a certain minimum profit can be added to the total cost of producing and…

  • Stripping Ratios: What are They and Why are They Important? …

     · stripping ratio of al mine NAMIBIA ASSETS UIS TIN PROJECTAFRITIN Uis was discovered in 1911 and was developed by Iscor of South Africa as the largest hard-rock tin mine in the world. Production started in the 1950s and ended in 1990 as a result of depressed ...

  • Managing the slope | Mineral Production Activities | …

    Pre-stripping costs are considered as part of the capital expenditure to open the mine. Once ore is being mined, stripping of waste continues but pre-stripping is complete. Pre-stripping is included in calculation of stripping ratio. Rock, both ore and waste, close ...

  • (PDF) Stripping Ratios, Pit Limits & Cutoff Grade …

    SR = (3.00 –0.40)/0.50 = 5.2 tons of waste/ ton of ore i.e. while the stripping ratio is less than 5.2 it is most economical to mine the deposit by open pit. When the stripping ratio exceeds 5.2 it will be more economical to mine using the underground mining method block caving.

  • FASB Emerging Issues Task Force

    mine stripping ratio," or a "stripping ratio," which is calculated as the estimated total number of units (for example, tons) of waste material mined during production divided by the estimated total proved and probable reserves contained within the mine (that is, recoverable ore in a unit of

  • Lecture 4 Calculating Stripping Ratios For Area Strip Mines

    fThe Coal Area Strip Mine Formula. Strip Ratio = OB Thickness (in ft) * 11.11/. Coal thickness in inches. Assumes coal is 80 lbs/ft^3 (good for bituminous) Area Strip Mine Geometry Geologic Stripping Ratio no accounting for rehandle or less than coal recovery. fYour Turn.

  • A Review of Operations Research in Mine Planning

    Newman et al.: A Review of Operations Research in Mine Planning Interfaces 40(3), pp. 222–245, ©2010 INFORMS 225 We now mention the progress from the traditional technique to advanced techniques that attempt to solve the entire mine scheduling problem as

  • stripping ratio mining

    The ratio between waste rock and ore production is called the stripping ratio. For example, a stripping ratio of 2:1 means that 2 tonnes of waste rock needs to be mined to mine 1 tonne of ore. Generally, an open pit mine has a higher stripping ratio than an …

  • IFRIC 20 — Stripping Costs in the Production Phase of a …

     · IFRIC 20 considers when and how to account sep­a­rately for these two benefits arising from the stripping activity, as well as how to measure these benefits both initially and sub­se­quently. IFRIC 20 only deals with waste removal costs that are incurred in surface mining activity during the pro­duc­tion phase of the mine (''pro­duc­tion ...

  • Stripping Ratios: What are They and Why are They …

     · At their most basic, strip ratios can be calculated by dividing overburden thickness by ore thickness. For example, an overburden thickness of 100 meters and an ore …

  • Stripping Ratio | Mineral Production Activities | Extractives …

    Stripping is the removal of waste rock from above and around the orebody. Stripping ratio is defined as the tonnage of waste rock to be mined, divided by the tonnage of ore to be mined from the pit. Stripping ratio is influenced by the shape of the orebody and …

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