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ratio mining stripping

Jun 06, 2010·Stripping ratioallows definition of this “breakeven” point. Switch to undergroundminingif yourstripping ratiois more than BESR. a. May or may not be economically feasible * Consider value of ore. b. Major expense/effort is required to switch * Major capital expenditure: how to handle this?

Stripping Ratios What are They and Why are They Important

Oct 31, 2018· A strip ratio, or stripping ratio, isan important measurement related to the open-pit mining process.It represents the amount of waste material, also known as overburden, that must be moved in...

Stripping Ratio Mineral Production Activities

Stripping ratio is defined asthe 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 the longer …

Determining Stripping Ratio Basic Mining Techniques

BESR = [ (0.006*0.92*1.63*1000) – (6.8)]/7.5. = 0.29 = 0.3is 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).

What Is a Stripping Ratio (with picture)

Dec 04, 2020· Stripping ratio isa 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. 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 …

What Is aStripping Ratio (with picture)

Dec 04, 2020· 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. 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 …

(PDF)Stripping Ratios, Pit Limits CutoffGrade

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.

Stripping ratio mining Britannica

In 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… Read More

Stripping ratioin coalmining

In mining, stripping ratio or strip ratio refers to the ratio of the volume of overburden (or waste material) required to be handled in order to extract some tonnage of ore. For example, a 3:1 stripping ratio means that mining one tonne of ore will require mining three tonnes of waste rock.

8 Break EvenStrippingRatioBESRMaximumStrippingRatioSR

Break EvenStripping Ratio(BESR)/MaximumStripping Ratio(SR max)/Cut offStripping Ratio: This is defined as thatstripping ratioat which cost ofminingone tonne of ore & corresponding volume of waste material equals the revenue received by sale of one tonne of orebody OR when cost ofminingore & waste matches with revenue generated by sale of ore. • Overall Pit Limit is decided by Break ...

How to calculate stripping ratio ResearchGate

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 commonly expressed as: SR=Waste (tons) / ore (tons) A wide variety...

BasicMiningTechniques

BasicMiningTechniques

Lecture 4 Calculating Stripping Ratios for Area Strip

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

Key Financial Ratiosto Analyzethe Mining Industry

May 08, 2020· The quickratiois important for evaluatingminingcompanies because of the substantial capital expenditures and financing necessary formining…

Stripping ratioin coalmining

Stripping ratio. Inmining,stripping ratioorstrip ratiorefers to theratioof the volume of overburden (or waste material) required to be handled in order to extract some tonnage of ore. For example, a 3:1stripping ratiomeans thatminingone tonne of ore will requireminingthree tonnes of waste rock.

Lecture 4 Calculating Stripping Ratios for Area Strip

Calculating Stripping Ratios for Area StripMines. Mnge 315 Dr. B. C. Paul spring 2003 revised 2010 Note These notes contain information considered common knowledge to those familiar withStrip Mining. Books such as Elements of Practical CoalMiningand SMEs SurfaceMiningwere specifically referenced

stripping ratio calculation in mining Sians Karaoke

OverallStripping Ratio(OSR) AllowableStripping Ratio(ASR) 5 3 26 5 The next scenario evaluated is the UG option alone The BCOG of the deposit was calculated applying the same equation used in the first scenario however changing the OPminingcosts for UGminingcosts and the result found was a BCOG of 1 33 g/t From the calculation of

Coal Ratio an overview ScienceDirect Topics

Contour surfaceminingtakes advantage of the lowstrip ratiocoal reserves adjacent to the outcrop. Contourminingequipment includes a drill, loader, bulldozers, and trucks. The steps in contourminingbegin with drilling and blasting a triangle shaped portion …

influence of striping ratio on open castcoalmining

Stripping ratio- Wikipedia. Inmining,stripping ratioorstrip ratiorefers to theratioof the volume ofoverburden (or waste ... removal prior to ore extraction, underground miningoperations tend to have lowerstrippingratios due to increased selectivity. ...Open-pitmining... Get Quote; SurfaceMining- ResearchGate. Feb 2, 2016 ...

Strip Mining an overview ScienceDirect Topics

Andrew P. Schissler, in Encyclopedia of Energy, 2004. 2.3Strip Mining.Strip miningis employed in coal reserves where the overburden is removed in rectangular blocks in plan view called pits or strips. The pits are parallel and adjacent to each other.Strip miningis fundamentally different from contour or areaminingon how the overburden is displaced, called spoil handling.

Major Mines Projects MiningIntelligence and News

Porgera Mineis an epithermal vein-type gold-silver deposit but it shares many characteristics with porphyry copper deposits. Remnant heat from the intrusive rocks drove the boiling and upward migration of hydrothermal fluids and resulted in the emplacement of mineralization.

TUTORIAL EXAMPLES stripping ratios and cut off grades

SOLUTION Break-even cut-off grade =Miningcost/t ore + concentrating cost per tonne ore (Metal price per tonne – SRM costs per tonne metal) x recoveryMiningcost per tonne ore =Miningcost per tonne material x (1 +stripping ratio)Miningcost per tonne ore ($1.47(1+1.5) = $3.68 Concentrating cost per tonne ore = $5.17 Metal price per ...

2 Economic factors ore grade ore tonnagestripping ratio

24 OPEN CAST(STRIP)MINING: • It is most common surface exploitation method normally used for large scaleminingof coal & other bedded deposits. • This resembles open pitminingwith one unique difference i.e. the overburden may not be required to be transported to waste dumps for disposal but casted/dumped directly into adjacent mined out area. •Strip miningis ideally applied where ...

Problem 6.2 (from Page 178, IntroductoryMiningEn

Problem 6.2 (from page 178, IntroductoryMiningEngineering) Calculate the maximumstripping ratio(SR.max = ?) and the overallstripping ratio(SRo = ?) for the open pit shown in Figure 2. given the following conditions: •StrippingAllowance: $1.50/ton •StrippingCost: $0.25/ton • Pit Slope: B = 65° • Berm at top of ore: a = 30 ft • Surface inclination: 25° • Dip of bed: a = 0 ...

IFRIC20, policy for deferred stripping costs, mining

Strippingcosts for the component are deferred to the extent that the current periodratioexceeds the life of componentratio. Thestrippingactivity 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 ...

12 Stripping Ratios Pit Limits IntroductiontoMining

3StrippingRatios Instantaneousstripping ratio: Thestripping ratiofor a given push back Overallstripping ratio: Thestripping ratiofor the total amount of material removed. Break-evenstripping ratio: The instantaneousstripping ratioat the point where the cost ofstrippingthe waste exactly equals the value of the ore uncovered.Stripping RatioExample It will be assumed that: the pit ...

TV BIP Ratio Explained The Economics of OilSandsMining

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.

miningengineering STRIPPING RATIO (S)

Jun 06, 2010·Stripping ratioallows definition of this “breakeven” point. Switch to undergroundminingif yourstripping ratiois more than BESR. a. May or may not be economically feasible * Consider value of ore. b. Major expense/effort is required to switch * Major capital expenditure: how to handle this?

Surface Mining Methods ILO Encyclopaedia

Stripping ratios of 2:1 up to 4:1 are not uncommon in large mining operations. Ratios above 6:1 tend to be less economically viable, depending on the commodity. Once removed, overburden can be used for road and tailings construction or may have non-mining commercial value as fill dirt.

2 Economic factors ore grade ore tonnagestripping ratio

24 OPEN CAST(STRIP)MINING: • It is most common surface exploitation method normally used for large scaleminingof coal & other bedded deposits. • This resembles open pitminingwith one unique difference i.e. the overburden may not be required to be transported to waste dumps for disposal but casted/dumped directly into adjacent mined out area. •Strip miningis ideally applied where ...

Strip Mining an overview ScienceDirect Topics

Andrew P. Schissler, in Encyclopedia of Energy, 2004. 2.3Strip Mining.Strip miningis employed in coal reserves where the overburden is removed in rectangular blocks in plan view called pits or strips. The pits are parallel and adjacent to each other.Strip miningis fundamentally different from contour or areaminingon how the overburden is displaced, called spoil handling.

IFRIC20, 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 Valuation Techniques P NAV, P CF, EV Resource

NAV is a sum-of-the-parts approach to valuation, in that each individualminingasset is independently valued and then added together. Corporate adjustments are made at the end, such as head office overhead or debt. Below is a screenshot of a NAV model from CFI’sMiningFinancial Modeling Course. Price to Cash FlowRatio(P/CF)

CanIndonesia's coal mines maximise strip ratios andboost

Dec 16, 2016· Report summary. The declining trend in strip ratios for Indonesia's coal mines have allowed producers to survive in periods of lower coal prices through reduction in production costs and margins. However, producers are likely to have sterilised coal and jeopardised future coal reserves with continuous mining in lower strip areas.

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