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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: $1.50/ton • Stripping Cost: $0.25/ton • Pit Slope: B = 65° • Berm at top of ore: a = 30 ft • Surface inclination: 25° • Dip of bed: a = 0 ...
Get Price3.2.6: Maximum Allowable Stripping Ratio (SRmax) Earlier in this lesson, we looked at the maximum stripping ratio, and we did it for coal seam. You will recall that the maximum allowable stripping ratio, SR max, also called break-even stripping ratio, is the maximum amount of overburden/waste that can be extracted per unit of ore at the economic pit limit.
Get PriceIn 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. Stripping ratios are typically reduced to show the volume of waste removal required to extract one unit ...
Get PriceTable of ContentsAssay Maps and SectionsVolume and Tonnage EstimatesOre Volume CalculationOre Tonnage CalculationsOre Grade EstimationEstimates based on Drill-Hole DataOre Reserve Estimate EXAMPLE 1Ore Reserve Estimate EXAMPLE 2Estimates based on Underground SamplingWeighting of Assays of Individual SamplesErratic High AssaysComputation of Tonnage and Grade of Ore by …
Get PricePre-stripping is included in calculation of stripping ratio. Rock, both ore and waste, close to surface, may be softer than in other parts of the pit, especially if it is oxidized. Soft rock may be amenable to mining by ripping and dozing with a bulldozer instead of drilling & blasting.
Get PriceEven if there was an average of ALL open pit mines that would not offer any knowledge regarding open pit mining. The stripping ratio in a mine is chosen based on economics. A high grade orebody can...
Get Price5 and a stripping ratio of 2.3:1. Indicated resources amount to a further 187 Mt, 19.7% P 2O 5, stripping ratios 5:1 or less • The Umm Wu'al North area has a demonstrated and inferred total resource of 537 Mt averaging 19.35% P 2O 5 with a stripping ratio less than 5:1 • The Al Amud area has a demonstrated resource of 24 Mt averaging 21 ...
Get PriceStripping 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 PriceThe 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. It appears there is a calculation that helps determine the …
Get PriceFor 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 PriceYes, a 3:1 stripping ratio means that mining one cubic meter of ore will require mining three cubic meters of waste rock. How do you calculate a ratio from a percent? Formula to calculate the ratio
Get PriceIn 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 wil...
Get PriceThe stripping ratio is the relationship between the waste and ore volume. Different sensitivity analysis will also be performed in order to appreciate what happens to the project economics when certain variables of high importance, such as the processing capacity, gold price and dilution rate vary. Open-pit mining operations are long-term
Get PriceThe boundary stripping ratio in ore mining. V. N. Mosinets & A. S. Khodinov Soviet Mining volume 9, pages 166 – 168 (1973)Cite this article. 72 Accesses. This is a preview of subscription content, log in to check access. Literature Cited. 1. P. É. Zurkov, Gorn. Zh., No. 12 (1948). 2. A. I. Arsent'ev and A. K. Polishchuk, Development of Methods of Determining Boundaries of Open-Cut Mines [in ...
Get Pricebetween normal mining activities and a stripping activity. Management will need to identify the associated component of the ore benefiting from the stripping activity; and setting up the amortisation calculations, which will be more complex than what many companies are used to. Given the increased involvement of management and the data gathering exercise, implementation will be costly for many ...
Get Price1 4 Stripping Ratio Ratio Surface Mining Scribd. 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) 14 Stripping Ratio Stripping ratio is defined as the ratio
Get Price01/10/2013· The profit function can also be formulated in unit values (per ton or cubic meter of ore), by assigning a unit profit function L ′ ($/h), which is given by (2) L ′ = T U V − M − E R − B − F P. In all these variables, there are two geological characteristics, which have great importance: the stripping ratio R and the grade of ore T.It is therefore essential to determine what their ...
Get PriceIn 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. Stripping ratios are typically reduced to show the volume of waste removal required to extract one unit ...
Get PriceYes, a 3:1 stripping ratio means that mining one cubic meter of ore will require mining three cubic meters of waste rock. How do you calculate stripping ratio for Open Pit Mines? Overburden tons ...
Get Price* We calculate the amount of waste that needs to be removed to get an amount of ore/coal . Miners Only …. 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 …
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