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# stripping ratio of al mine

## Determining Stripping Ratio - Basic Mining Techniques

The maximum allowable Stripping Ratio (SR max) defines break even stripping ratio (BESR).This represents the highest possible units of waste that can be handled. If the SR exceeds the BESR then the operation will be uneconomical as the income generated by the ore is insufficient to offset the costs incurred in mining.

## (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 ...

## Stripping Ratios: What are They and Why are They Important ...

Examples of stripping ratios. Ioannou gave some examples of mines with good strip ratios, including Lundin Mining’s (TSX:LUN) Candelaria copper-gold-silver mine in Chile at 2.8:1, and Copper ...

## Stripping ratio - Wikipedia

In surface mining, stripping ratio or strip ratio refers to the amount of waste (or overburden) that must be removed to release a given ore quantity. It is a number or ratio that express how much waste is mined per unit of ore. The units of a stripping ratio can vary between mine types. For example, in coal mining the stripping ratio is commonly referred to as volume/weight.

## (PDF) Stripping Ratios, Pit Limits & Cutoff Grade ...

Stripping Ratios, Pit Limits & Cutoff Grade Optimization. Download. Related Papers. Optimum cut-off grade policy for open pit mining operations through net present value algorithm considering metal price and cost escalation. By Raul Cezar.

## Whats the average stripping ratio of open pit mines around ...

Even if there was an average of ALL open pit mines that would not offer any knowledge regarding open pit mining. The stripping ratio in a mine is chosen based on economics.

## ECONOMIC ASSESSMENT AND MINE PRODUCTION

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. The BCOG is the minimum grade

## Easy profit maximization method for open-pit mining ...

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 T.It is therefore essential to determine what their ...

## Economic Surface Mining of Multiple Seams

recovered from the salne mine, but each in a separate pit. Mulliple-scam mining is a very important phase of the stripping industry in the United States today. As in the casc of conventional stripping, multiple-seam slrip-miuing is classified either as area or contour mining .. Area strip-mining

## life-of-mine stripping ratio - Traducción al español – Linguee

Muchos ejemplos de oraciones traducidas contienen “life-of-mine stripping ratio” – Diccionario español-inglés y buscador de traducciones en español.

## How is stripping ratio calculated? – AnswersToAll

Jan 30, 2021 · 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 may vary considerably during the life of the mine.

## 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

## ECONOMIC ASSESSMENT AND MINE PRODUCTION

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. The BCOG is the minimum grade

## Standardized emissions inventory methodology for open

Ghose (2004, 2007) based on their own emission factors estimated that a typical open pit coal mine in India with a stripping ratio of 3.98 emitted 9366.7 kg/day of TSP while its production was 2500t/day ie. 3.74 Kg of TSP per Mg of coal produced. The mine companies operating in Colombia have also estimated their TSP emissions

## Mine Plan - an overview | ScienceDirect Topics

The primary surface mine design parameter and driver of unit production cost is the strip ratio. Strip ratios for minable coal reserves range from 1:1 to over 35:1. A decrease in the strip ratio will decrease the cost of producing the coal. Underground mining methods are employed when the amount of overburden that would have to be removed by ...

## Surface mining planning and design of open pit mining

Jan 09, 2016 · • Syncrude Tar Sands: SR = 1.2 - 1.4 • Highland Valley: SR ~0.5 • Bagdad mine: SR ~1.2 • Cortez mine: SR = 1.6 Examples: 2 February 2016 Prof. Dr. H.Z. Harraz Presentation Stripping Ratios Stripping ratio is defined as the ratio of the Overburden/Cover Rock / Waste Rock to the orebody. One of the ways of describing the geometrical ...

## Easy profit maximization method for open-pit mining ...

Oct 01, 2013 · 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 T.It is therefore essential to determine what their ...

## pwc 2012 Americas School of Mines

Notes: Strip Ratio Mining Methods 27 Mistakes are often made when computing the strip ratio. It’s all in the words and you have to watch the flow of material and how it is classified. For example, according to Freeport McMoran’s 2007 10K filing, the concentrator is capable of processing 75,000 metric tons per day of primary sulfide ore and

## 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/ 95 F-C Environmental Clearance(Reference to Grant) No. J-11015/26/99-IA II (M)

## Projects | Sibanye-Stillwater

Sep 09, 2021 · A roll-over mining methodology will be applied, with an average stripping ratio of 11.28. Production of 50ktpm of RoM ore is targeted for a total production of 300koz 4E PGM per annum for three years. Rehabilitation will be completed by the mining contractor at the end of the three-year mine life.

## LECTURE NOTES MIN 2202-2-Stripping Ratios and Pit Limits ...

3.Stripping Ratios and Pit Limits The technical and economic decisions in open pit operations is determined primarily by the ratio of the volumes of stripping to the tonnage of ore mined as a whole and in various periods of the open pit activity. The quantitative estimation of these relationships is done by using the stripping ratio. The following stripping ratios are normally used: (a ...

## Chapter 7 Energy Use in the Copper Industry

In general, as the stripping ratio increases, the amount of mine energy per ton of cathode cop-per also increases. Similarly, as the pit depth be-low the surface rim increases, the vertical and horizontal distances that the waste rock and ore must be hauled also increases. This increase is reflected in greater energy use, primarily for hauling.

## What Is a Stripping Ratio? (with picture)

The stripping ratio is important due to the fact that it helps a mining company assess a mining site in order to determine the profitability before committing any resources to the mining process. A way of describing the concept of stripping ratio is by looking at it in terms of the level at which the mining process will cease to be profitable.

## What is STRIPPING RATIO? What does STRIPPING RATIO mean ...

theaudiopedia What is STRIPPING RATIO? What does STRIPPING RATIO mean? STRIPPING RATIO meaning- STRIPPING RATIO definition - STRIPP...

## Opencast Working And Stripping Ratio » MiningPathsala

Jun 30, 2021 · stripping ratio :- It is generally expressed in the proportions of Overburden to coal or mineral removed. As the depth of Overburden increases more amount of money is spent for removal of the Overburden for exposing the mineral body / coal and the time will come when mineral / coal cannot be economically extracted out.

## Economic Surface Mining of Multiple Seams

recovered from the salne mine, but each in a separate pit. Mulliple-scam mining is a very important phase of the stripping industry in the United States today. As in the casc of conventional stripping, multiple-seam slrip-miuing is classified either as area or contour mining .. Area strip-mining

## Break-even stripping ratio | Britannica

The break-even stripping ratio is a function of ore value and the costs involved. If the break-even stripping ratio remains favourable, further cuts into the hillside will be made. Otherwise, if there are sufficient reserves under the knob of the hill, the coal may be recovered by underground mining or

## 1.1 PHASES OF A MINING PROJECT

The ratio of the quantity of overburden to the quantity of mineral ore (called the ‘strip ratio’) is usually greater than one, and can be much higher. For example, if a proposed mining project involves the extraction of 100 million metric tons of mineral ore, then the proposed mining project could generate more than one billion metric tons

## IFRIC 20 — Stripping Costs in the Production Phase of a ...

Aug 26, 2010 · IFRIC 20 only deals with waste removal costs that are incurred in surface mining activity during the production phase of the mine ('production stripping costs'). A stripping activity asset is depreciated or amortised on a systematic basis, over the expected useful life of the identified component of the ore body that becomes more accessible as ...

## Mine Planning | PDF | Coal Mining | Mining

techno-economic considerations deeper mines would entail higher stripping ratios. quality/price of coal and stripping ratio not permitting deeper opencast projects. cost plus projects approved only if consumers were willing to pay an agreed higher price. availability of explored area/proved reserves, both on adjacent and dip side area.

## Selection of practical bench height in open pit mining ...

Dilution versus bench height (Bozorgebrahimi et al., 2005). Figure 3. Large block of the simple sequencing method. In open pit mining, factors that can affect the degree of dilution can be regarded as deposit-related or mine-related. The bench height is a mine-related parameter that can be studied using a simple geometrical model of

## (PDF) Mining Methods: Part I-Surface mining

Extensive area of reserves (to give adequate life of mine (LOM) and to cover all capit al loan repaymen ts – typically more than 20 years life at 4- 14 mt per ann um production ). 2 February ...

## GUIDELINES FOR MINE HAUL ROAD DESIGN - 2001

Apr 07, 2016 · Most of the coal mines handled roughly 25 million tonnes per year. The average stripping ratio varied from 0.8:1 (Syncrude Canada Ltd.) to 18.9:1 (Bullmoose mine) but most of the coal mines had a stripping ratio of less than 10:1. A similar survey

## Cut-off grade estimation - QueensMineDesignWiki

Cut-Off grade is the minimum grade required in order for a mineral or metal to be economically mined (or processed). Material found to be above this grade is considered to be ore, while material below this grade is considered to be waste. Although in a variety of units can

## Chapter 4: Mining waste

The ratio of waste rock/ore is called stripping ratio. For example, a stripping ratio of 2:1 means that 2 tonnes of waste rock needs to be removed to mine 1 tonne of ore. Generally, an open pit mine has a higher stripping ratio than an underground mine. Waste rock is often deposited in piles or heaps close to the mine to minimize transports.

## Key Financial Ratios to Analyze the Mining Industry

Return-on-equity (ROE) is a key financial indicator considered by investors because it indicates the level of profit a company can generate from equity and return to stockholders. Average ROEs in ...

## Surface Mine Reserves - Carlson Software

The "Strip Ratio" for strata D will report the stripping ratio as if only strata C and D were mined. The "Strip Ratio Accumulative" reported for strata D will report the stripping ratio as if all strata above it were also mined (stratum A and B will be included). The below image is an illustration of this concept.

## Razorback Iron Project | Magnetite Mines

Jul 05, 2021 · The strip ratio is the ratio of waste removed to ore recovered. Razorback Ridge is the most prominent outcrop of ironstone in The Braemar resulting in minimal to no overburden. The current mine plan has determined the stripping ratio to be just 1 : 0.16 for life of mine.