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.
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Break Even Stripping Ratio (BESR) - BrainMass
This content was COPIED from BrainMass.com - View the original, and get the already-completed solution here! Given an underground total mining cost of $8.85 per tonne, surface mining costs of $2.95 per tonne of ore, and surface mining stripping costs of $1.75 per tonne of waste, calculate the break even stripping ratio (with zero profit) between surface and underground mining.
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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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strip ratio in coal mining - Mine Equipments
Stripping ratio - Wikipedia, the free encyclopedia In mining, stripping ratio or strip ratio refers to the ratio of the volume of overburden (or waste material) required to …
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mining engineering: STRIPPING RATIO (S)
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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Stripping ratio and pit limit - Basic Mining Techniques
Stripping ratio is expressed broadly as the ratio of waste to ore. It's simply calculating how much waste has to be removed to expose how much of ore to be mined. Stripping ratio determines where the pit limit will be. There are basically three (3) forms of stripping ratios.
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Understanding Iron Ores and Mining of Iron Ore – IspatGuru
Stripping ratios increase with the quality of the ore being mined and cost factors related to beneficiation and transportation. 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 ...
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Surface mining planning and design of open pit mining
vii) Stripping Ratio The ratio is most commonly expressed as: Strip Ratio (SR) is the mass of waste to be mined to obtain one unit mass of ore. Waste (tons) SR = ----- Ore (tons) For example, 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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(PDF) Stripping Ratios, Pit Limits & Cutoff Grade ...
For open pit mining the costs are $0.40/ton ore and a stripping cost of $0.50/ton of waste. 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.
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what is stripping ratio coal mining crusher
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.
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(PDF) Surface Mine Design - ResearchGate
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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Stripping ratio and pit limit - Basic Mining Techniques
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.
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4. concept of stripping ratios.pdf - Concepts of stripping ...
The ratio of the total volume of waste to the ore volume is defined as the overall stripping ratio : R = volume of waste removed to depth d volume of ore recovered to depth d 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.
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break-even stripping ratio | Britannica
In coal mining: Contour strip mining. 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 by augering.
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Blasting Principles - Orica
Strip Ratio. The ratio of waste material to ore or coal moved in a defined period. Stope. An underground void formed by the mining of ore, as distinct from development. Surface Mine. Refer to open cut mine. T Trim Blast. A blast designed to reduce damage and backbreak to the rock left behind.
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12_Stripping Ratios & 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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Stripping Ratio & Break even stripping ratio in Opencast ...
In this we will learn about Stripping Ratio & Break even stripping ratio in Opencast Mines, (surface mining) & all numerical covered.
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The boundary stripping ratio in ore mining | SpringerLink
The boundary stripping ratio in ore mining Download PDF. Download PDF. Open-cut Mining; Published: 01 March 1973; The boundary stripping ratio in ore mining. V. N. Mosinets 1 & A. S ...
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what is stripping ratio coal mining
Stripping ratio - Wikipedia, the free encyclopedia. In mining, stripping ratio or strip ratio refers to the ratio of the volume of overburden (or waste material) required to …
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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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What is stripping Ratio and how is it calculated? - Answers
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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RESPONSE LETTER - SEC.gov
From commencement of mining in 1997 to 2003, the Company attributed stripping costs in its Minifie pit based on the stripping ratio determined on a phase basis. The mining and geological conditions were also such that phase ratios were reasonably consistent and predictable, although at times, material variability in the ratios did occur.
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(PPT) Calculating Stripping Ratios for Area Strip Mines ...
life is good fthe 2d cross section area = base * height interest item – slope angle has no effect overburden the problem is 1d only depends on thickness and density base for both coal and the overburden is the same that means the base will cancel! fthe coal area strip mine formula • strip ratio = ob thickness (in ft) * 11.11/ coal …
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Break Even Stripping Ratio Example For Coal Mining
coal mining stripping ratio - Gold Mining Equipment,Gold ... coal mines to guide mining project evaluation to find the ATC in open pit coal mines. High stripping ratio, ... The break-even stripping ratio is a ... for example coal. Read more. coal mining stripping ratio, stripping ratio encyclopedia.
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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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4. concept of stripping ratios.pdf - Concepts of stripping ...
Importance 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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How do you calculate the stripping ratio? - Answers
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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Key Financial Ratios to Analyze the Mining Industry
The quick ratio is important for evaluating mining companies because of the substantial capital expenditures and financing necessary for mining operations. Analysts and creditors prefer to see ...
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OSR - Overall Stripping Ratio (mining) | AcronymFinder
OSR stands for Overall Stripping Ratio (mining) This definition appears somewhat frequently and is found in the following Acronym Finder categories: Science, medicine, engineering, etc. Business, finance, etc. MLA style: "OSR." Acronym Finder. 2021.
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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 …
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Open Pit Mining | IntechOpen
Also, the ratio of the total volume of waste to the total volume of ore is defined as the overall stripping ratio. A lower stripping ratio means that less waste has to be removed to expose the ore for mining which generally results in a lower operating cost . The major types of stripping ratios are overall, instantaneous, and break-even.
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Stripping ratio - Wikipedia
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.
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New guidance on accounting for stripping activities – a ...
The stripping component should be specifically associated with the component of ore that becomes more directly accessible as a result of the stripping activity. The DI proposes this "specific association" approach in preference to the "strip ratio" approach which is currently used by many in the industry. Recognising the stripping cost ...
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