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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

Many translated example sentences containing mining stripping ratio Spanish-English dictionary and search engine for Spanish ... in periods when the actual ratio was less than the life-of-mine stripping ratio, we reduced the capitalized mine stri ... reserve calculations, our mine engineers have calculated a life-of-mine stripping ...

Overall stripping ratio is the proportion of the whole volume of overburden in the open-pit to the total reserves of the mineral. In other words, according to Equation 1, the ratio of the total volume of waste to the ore volume is defined as overall stripping ratio 8. HGP where, NPV calculate Where, OSR overall stripping ratio,

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

Transcribed image text Problem 6.2 from page 178, Introductory Mining Engineering Calculate the maximum stripping ratio SR.max and the overall stripping ratio SRo for the open pit shown in Figure 2. given the following conditions Stripping Allowance 1.50ton Stripping Cost 0.25ton Pit Slope B 65 Berm at top of ore a 30 ft Surface inclination 25 ...

The boundary stripping ratio in ore mining. V. N. Mosinets 1 amp ... B. P. Yumatov, Technology of Open-Cut Mining and Basic Calculations in Combined Working of Ore Deposits in Russian, Nedra, Moscow 1966. Google Scholar Download references. Author information. ...

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

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

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

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

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

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.

Jan 30, 2021 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. Whereas in metal mining, stripping ratio is unitless and is expressed as weightweight. A stripping ratio can be expressed as a ratio

For conducting a mining projects break even analysis, you first need to know about the operational expenses OPEX.When the OPEX is known, you can calculate the minerals 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 isnt available, I refer you ...

The open pit mining method of solid minerals extracting is widely used both in Russia and in the whole world, and sets a general direction of mining industry development as its main tool, at least for the next decades. This is due to its significant advantages compared with other methods of minerals extraction, especially with underground method. This conclusion is made considering production ...

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 11 to 115 or even more.

Jan 09, 2016 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 31 stripping ratio means that mining one cubic meter of ore will require mining three cubic meters of waste

SOLUTION Break-even cut-off grade Mining costt ore concentrating cost per tonne ore Metal price per tonne SRM costs per tonne metal x recovery Mining cost per tonne ore Mining cost per tonne material x 1 stripping ratio Mining cost per tonne ore 1.4711.5 3.68 Concentrating cost per tonne ore 5.17 Metal price per ...

Mar 01, 2019 Overburden handling has important impacts on surface mining projects and has to be carefully planned considering both mining activities and site rehabilitation , .Overburden handling activities start at the beginning of the mining project, when a huge amount of material from initial underground development or stripping is removed for site preparation , .

Oct 30, 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

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 11 to 115 or even more.

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