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

Get QuoteMar 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 ...

Get Quotestrip 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 .

Get QuoteThus, 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.

Get QuoteAVERAGE 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.

Get QuoteContour 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 …

Get QuoteJul 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.

Get QuoteMulliple-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

Get QuoteFeb 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...

Get QuoteFor 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 ...

Get Quotemining. 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 …

Get QuoteOther 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…

Get QuoteStripping 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. ...

Get Quote1 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 ...

Get QuoteJun 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.

Get QuoteApr 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.

Get Quotestripping 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

Get Quote4.1.7 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.

Get QuoteThe 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.

Get QuoteNotes: 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

Get Quoteemployed 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.

Get QuoteNov 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.

Get QuoteSep 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 ...

Get QuoteMining 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 ...

Get QuoteJun 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

Get Quotecalculate 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 ...

Get QuoteJun 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.

Get Quote2 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.

Get QuoteThe 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 ...

Get QuoteStripping 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 ...

Get QuoteApr 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).

Get QuoteThe 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 …

Get QuotefThe 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.

Get QuoteStripping 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 …

Get QuoteThe 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.

Get QuoteThe 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.

Get QuoteOct 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 …

Get QuoteThe 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.

Get QuoteA 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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