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stripping ratio calculation in mining

Calculating Stripping Ratios For Area Strip Mines

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 SMEs Surface Mining were specifically referenced. Stripping Ratio as a Fundamental Ability to surface mine depends on the value

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3.2.5 Instantaneous Stripping Ratio ABC 123 Testing

3.2.5 Instantaneous Stripping Ratio ABC 123 Testing

Mar 02, 2010 The stripping ratio (SR) refers to the amount of waste material that must be removed for a given amount of ore. The Instantaneous Stripping Ratio (ISR) is the stripping ratio for a given push back, where a tiny slice of material, i.e., ore and/or waste, is removed from a pit wall. This section presents the ISR calculation for a steeply pitching ...

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Stripping Ratio Calculation In Mining

Stripping Ratio Calculation In Mining

strip ratio in coal miningStripping Ratio Calculation In Mining. Strip ratio is very important in the mining world. . 10:1 strip ratio) That is coal mining or strip mining at its . to use the volume over volume calculation. Get Price And Support Online; Agoldenmomentfor mining - PwC. Agoldenmomentfor mining .

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3.2.4 Step 2 How Much of the Resource is a Reserve

3.2.4 Step 2 How Much of the Resource is a Reserve

Thus, given the stripping cost and the value of the exposed ore, we can calculate the breakeven or maximum stripping ratio. Stripping costs can be estimated reasonably well, based on the method of overburden removal and the region in which the mining is being conducted. We can find tables of data in handbooks to help us with this estimation.

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PDF Surface Mine Design

PDF Surface Mine Design

AVERAGE STRIP RATIO: Total waste divided by total ore within the ultimate pit. CUTOFF STRIPPING RATIO: Costs of mining a ton of ore and associated waste equals to net revenue from the ton of ore.

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Coal Ratio an overview ScienceDirect Topics

Coal Ratio an overview ScienceDirect Topics

Contour surface mining takes advantage of the low strip ratio coal reserves adjacent to the outcrop. Contour mining equipment includes a drill, loader, bulldozers, and trucks. The steps in contour mining begin with drilling and blasting a triangle shaped portion …

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Net Asset Value in Mining Sell Side Handbook

Net Asset Value in Mining Sell Side Handbook

Jul 20, 2017 Also note the strip ratios for each year (this is the amount of waste rock that is mined while mining the ore). The total material moved is calculated by multiplying the strip ratio with the ore depleted, then adding the ore depleted. A strip ratio of 10x and a depletion of 4.5 Mtonnes equates to 49.5 Mtonnes of material moved.

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Economic Surface Mining of Multiple Seams

Economic Surface Mining of Multiple Seams

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 is practiced on relatively flat terrain. A 'box cut' is made

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Basic Mining Techniques

Basic Mining Techniques

Feb 25, 2020 Stripping ratio and pit limit Gideon Gipmai Yowa (July, 2017) Senior Instructor, Mining Eng. Dept., PNG University of Technolog... Mining Regulatory Framework of Papua New Guinea Overview The mining industry in Papua New Guinea (PNG) is experiencing an unprecedented period of activity and growth and it is an exc...

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Break Even Analysis How to Calculate the Cut Off Grade

Break Even Analysis How to Calculate the Cut Off Grade

For conducting a mining project’s break even analysis, you first need to know about the operational expenses (OPEX).When the OPEX is known, you can calculate the mineral’s cut off grade, which is the break even grade, below which it is not economically viable to mine the ore.To find out how I come up with the cost price per tonne (OPEX) if a feasibility study isn’t available, I refer you ...

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Break even stripping ratio Britannica

Break even stripping ratio Britannica

mining. 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 …

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Stripping ratio mining Britannica

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…

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what is stripping ratio coal mining ppt

what is stripping ratio coal mining ppt

Stripping Ratio Calculation In Mining. Strip Ratio The stripping ratio is the most influential economic factor in the evaluation and planning of open-pit coal mines. It represents the volume of rock both above and within (partings) coal seams expressed in Bank Cubic Metres (BCMs) which must be mined to obtain 1 tonne of raw or clean coal. ...

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stripping method of mining Prominer Shanghai Mining

stripping method of mining Prominer Shanghai Mining

1 4 Stripping Ratio | Ratio | Surface Mining - Scribd. After going through this lecture you will be able to 1. list and define stripping ratios (K, C) 2. calculate various stripping ratios for given situations (C, Ap) 3. explain the influence of stripping ratios on planning decisions (A, S) 4. assess the most economic method of mineability of a deposit by surface mining or underground mining ...

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How do you calculate the stripping ratio Answers

How do you calculate the stripping ratio Answers

Jun 06, 2009 Yes, a 3:1 stripping ratio means that mining one cubic meter of ore will require mining three cubic meters of waste rock.

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TV BIP Ratio Explained The Economics of Oil Sands Mining

TV BIP Ratio Explained The Economics of Oil Sands Mining

Apr 30, 2016 The strip ratio (SR) is the simplest measure of mining efficiency. Defined as the weight of overburden (or waste ore) divided by the weight of oil sands ore, a strip ratio of 2 is considered high but feasible if the ore grade is high enough. A better measure of mining economics is the TV:BIP ratio.

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Break Even Stripping Ratio Example For Coal Mining

Break Even Stripping Ratio Example For Coal Mining

stripping ratio in coal mining CachedIn mining, stripping ratio or strip ratio refers to the ratio of the volume of overburden (or waste material) required to be ... Read more break even ratio for australia coal mining - crusher in India

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chap 4.2 4.1.7 CUT OFF STRIPPING RATIO OR BREAK EVEN

chap 4.2 4.1.7 CUT OFF STRIPPING RATIO OR BREAK EVEN

4.1.7 CUT-OFF STRIPPING RATIO OR BREAK-EVEN STRIPPING RATIO The stripping ratio at which the cost of mining the ore and waste is equal to the revenue from that ore. The cut-off stripping ratio is the same as the break-even stripping ratio. This is the stripping ratio at which the net value of the last increment of ore is just sufficient to pay for the cost of removing the waste to release the ore.

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RESPONSE LETTER SEC.gov

RESPONSE LETTER SEC.gov

The deferred stripping method is generally accepted in the mining industry where mining operations have diverse grades and waste-to-ore ratios; however industry practice does vary. Stripping costs (including any adjustment through the deferred stripping asset) is treated as a production cost and included in its valuation of inventory.

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www.pwc.com 2012 Americas School of Mines

www.pwc.com 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

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Underground Mining Methods and Equipment

Underground Mining Methods and Equipment

employed when the depth of the deposit and/or the waste to ore ratio (stripping ratio) are too great to commence a surface operation. Once the economic feasibility has been verified, the most appropriate mining methods must be selected according to the natural/geological conditions and spatial/geometric characteristics of mineral deposits.

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Topic 5 Mining Methods Part I Surface mining

Topic 5 Mining Methods Part I Surface mining

Nov 02, 2011 Strip-mining: Blast, scoop off rock overburden, and then scoop out ore material. Fairly shallow. Economics of strip mining depend on stripping ratio Large land area can be involved, especially for coal and bauxite. Strip mining. Example: Alcoa’s Sierra de Bahoruco Aluminum mining in D.R. Southern Peninsula until 1985 39.

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A new method to confirm the economic and reasonable

A new method to confirm the economic and reasonable

Sep 14, 2010 Abstract: Economic rationality is currently open pit stripping ratio is well calculated by comparing the cost of industrial exploitation, the calculation does not take into account the safety of mining work well accidents, such as surface subsidence caused by enormous economic losses, but also did not consider the open-pit mining on the ecology of environmental damage and environmental ...

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Mining Valuation Course Transcript

Mining Valuation Course Transcript

Mining projects are essentially a perfect DCF candidate as they allow us to forecast out for the whole life, and discount back to today. The earlier the stage of the asset is, the harder it is to do, as there is more uncertainty involved. 2 P/NAV ratio. Price to net asset value ratio or P/NAV ratio is the most common metric used in the mining ...

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coal ton to bcm 171 BINQ Mining

coal ton to bcm 171 BINQ Mining

Jun 07, 2013 Stripping Ratio(s) – Surface Mining | COAL MINING AND GEOLOGY 24 Nov 2012 … Coal miners measure waste in BCM, or bcy, and coal in tonnes or tons.Thus in coal SR is the number of BCM of waste that needs to be … More detailed

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1 4 Stripping Ratio Surface Mining Mining

1 4 Stripping Ratio Surface Mining Mining

calculate various stripping ratios for given situations (C, Ap) 3. explain the influence of stripping ratios on planning decisions (A, S) 4. assess the most economic method of mineability of a deposit by surface mining or underground mining from the limiting stripping ratio (A, S, E) 1.4 Stripping Ratio Stripping ratio is defined as the ratio ...

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mining engineering STRIPPING RATIO S

mining engineering STRIPPING RATIO S

Jun 06, 2010 a. 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.

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12 Stripping Ratios amp Pit Limits Introduction to Mining

12 Stripping Ratios amp Pit Limits Introduction to Mining

2 Stripping Ratios: Waste units/Ore units Stripping Ratios The stripping ratio (SR) refers to the amount of waste that must be removed for a given quantity of ore in open pit mining. It is most commonly expressed as: (tons) Ore (tons) Waste SR = A wide variety of other units are used as well.

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Surface Mine Reserves

Surface Mine Reserves

The program will first determine the lowest Instantaneous stripping ratio in the calculation area. The program will then determine in which direction the stripping ratio increases the least. If mining were to start in the area of lowest stripping ratio and then move one grid node in the direction of least increasing stripping ratio, the ...

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IFRIC 20 policy for deferred stripping costs mining

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 ...

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Determining Stripping Ratio Basic Mining Techniques

Determining Stripping Ratio Basic Mining Techniques

Apr 04, 2016 Calculate the BESR. BESR = [ (0.006*0.92*1.63*1000) – (6.8)]/7.5. = 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).

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PPT Calculating Stripping Ratios for Area Strip Mines

PPT Calculating Stripping Ratios for Area Strip Mines

The 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 100% coal recovery Your Turn • Use What You Have Learned About Calculating Stripping Ratios for Strip Mines and Break Even Limits to Determine …

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Lecture 4 Calculating Stripping Ratios For Area Strip Mines

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 100% coal recovery. fYour Turn.

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Stripping Ratio Mineral Production Activities

Stripping Ratio Mineral Production Activities

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. Except in rare cases, it increases with depth of the orebody below surface. The unit cost of mining may increase over the life of a pit due to increased stripping ratio and …

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PDF Stripping Ratios Pit Limits amp Cutoff Grade

PDF Stripping Ratios Pit Limits amp Cutoff Grade

The amount of ore uncovered is A4: A4 = 100 * 25 + 100 * 25 = 5,000 ft2 2A3 = 125 * 125 -100 * 100 = 5,625 ft2 The instantaneous stripping ratio is: 5,625 SR (instantaneous) = = 1.125 5,000 The overall stripping ratio with bench 7 removed is: 15,625 SR (overall) = = 0.48 32,500 Bench 8 With mining of bench 8, another 5,000 ft2 of ore (A6) is removed.

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stripping ratio calculation in mining

stripping ratio calculation in mining

The strip ratio (SR) is the simplest measure of mining efficiency. Defined as the weight of overburden (or waste ore) divided by the weight of oil sands ore, a strip ratio of 2 is considered high but feasible if the ore grade is high enough. A better measure of mining economics is the TV:BIP ratio.

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Stripping Ratios What are They and Why are They Important

Stripping Ratios What are They and Why are They Important

Oct 31, 2018 Calculating stripping ratios At their most basic, strip ratios can be calculated by dividing overburden thickness by ore thickness. For example, an overburden thickness of …

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What Is a Stripping Ratio with picture

What Is a Stripping Ratio with picture

The stripping ratio method of calculating the profitability of the mining procedure is commonly used in the ore or coal mining process. In relation to its application in the mining of ore, the utility of the stripping ratio is the determination of the approximate ratio of waste material that must be moved in order to reach a certain ratio of ore.

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Whats the average stripping ratio of open pit mines around

Whats the average stripping ratio of open pit mines around

A high grade orebody can support a high stripping ratio. A low grade ore body cannot support a high stripping ratio. Thus you may have a range of stripping ratios from 1:1 to 1:15 or even more.

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