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Whats the average stripping ratio of open pit mines

The stripping ratio in a mine is chosen based on economics. ... The two largest gold pits in Canada at the moment boast a similar waste/ore ratio of about 1.8 / 1. Cite. 1 Recommendation.

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Stripping Ratios: What are They and Why are They

2018-10-30  A strip ratio, or stripping ratio, is an 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 ...

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Stripping ratio and pit limit - Basic Mining Techniques

2017-7-26  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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Determining Stripping Ratio - Basic Mining Techniques

2016-4-4  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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What Is a Stripping Ratio? (with picture) - wiseGEEK

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

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Mining Terms - kau

2008-11-12  Placer Mining: minerals in alluvium –Gold, Titanium . Solution Mining For any mineral that is in or may be transported in a liquid state – oil, ... Stripping Ratio: is the ratio of a unit of waste material removed per similar unit of ore material removed. Toe: is the base of a bank bench or a slope.

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LAND DEGRADATION DUE TO MINING AND ITS

2011-3-26  The ratio of overburden excavated to the amount of mineral removed is called the stripping ratio. For example a stripping ratio of 4:1 means that 4 tonnes of waste rock are removed to extract one tonne of ore. Lower the ratio, the more productive the mine. Stripping ratio varies with the area under mining. According to the data generated by

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(PDF) Mining Methods: Part I-Surface mining

2021-11-8  • Stripping Ratio ... Figure shows Hydraulic mining of a placer gold deposit . Figures from Hartman and Mutmansky, 2002. i) Hydraulic Mining (or Hydrauli c king) 2 February 2016 Prof.

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Xtract Resources PLC Manica Gold Project

•Gold price USD 1262/oz •480,000 of ore tonnes per annum mined •7 years of mine life •Average grade 2.72 g/t mined •Stripping Ratio 7.6:1 •All up break even cost USD 862/oz •Capital USD43.68 million •NPV at 8.4% discount USD42 million

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Chapter 4: Mining waste - SGU

The ratio of waste rock/ore is called stripping ratio. For example, a stripping ratio of 2:1 means that 2 tonnes of waste rock needs to be removed to mine 1 tonne of ore. Generally, an open pit mine has a higher stripping ratio than an underground mine. Waste rock is often deposited in piles or heaps close to the mine to minimize transports.

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MODELLING THE OPTIMUM INTERFACE BETWEEN OPEN

2021-3-26  ratio of price to cost per ounce of gold, stripping ratio, processed ounces and average grade at the run of mine pad. These indicators were used to compare four individual case study mines; with AngloGold Ashanti’s Sunrise Dam Gold Mine in Australia, which made the OP – UG transition in 2004 and hence develop an OP – UG transition model.

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Hartman, Introductory Mining Engineering, Thomas, An ...

2008-11-12  Gold Gold mining in Saudi Arabia dates back 5,000 years and search for the metal, throughout history, resulted in the discovery of hundreds of ... 5 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

more

LAND DEGRADATION DUE TO MINING AND ITS

2011-3-26  The ratio of overburden excavated to the amount of mineral removed is called the stripping ratio. For example a stripping ratio of 4:1 means that 4 tonnes of waste rock are removed to extract one tonne of ore. Lower the ratio, the more productive the mine. Stripping ratio varies with the area under mining. According to the data generated by

more

Chapter 2: An introduction to mining - SGU

The amount of waste rock produced relative to the amount of ore produced is called the stripping ratio. For example, a stripping ratio of 2:1 means that 2 tonnes of waste rock need to be mined to mine 1 tonne of ore. The stripping ratio depends on several things, such as the depth and geometry of the ore body, the mining method that is used and ...

more

(PDF) Mining Methods: Part I-Surface mining

2021-11-8  • Stripping Ratio ... Figure shows Hydraulic mining of a placer gold deposit . Figures from Hartman and Mutmansky, 2002. i) Hydraulic Mining (or Hydrauli c king) 2 February 2016 Prof.

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Open-Pit Mining Methods

2017-4-9  The stripping-ore ratio is a basic factor used for determining whether to employ open-pit or underground methods and for determining the economic limits of open-pit mining. Other factors influencing the choice between open-pit and

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Strip Mining - an overview ScienceDirect Topics

Andrew P. Schissler, in Encyclopedia of Energy, 2004 2.3 Strip Mining. Strip mining is 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 mining is fundamentally different from contour or area mining on how the overburden is displaced, called spoil handling.

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Homestake Gold Mine, Ruby Hill, Nevada - Mining

As of 31 December, 2008 , the mine held 831,000oz of proven and probable mineral reserves/gold. OPEN-PIT MINING. The open pit was mined before closure using Caterpillar 777D 91t-capacity haul trucks and a Cat 992G wheel loader. The overall

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Xtract Resources PLC Manica Gold Project

•Gold price USD 1262/oz •480,000 of ore tonnes per annum mined •7 years of mine life •Average grade 2.72 g/t mined •Stripping Ratio 7.6:1 •All up break even cost USD 862/oz •Capital USD43.68 million •NPV at 8.4% discount USD42 million

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The boundary stripping ratio in ore mining SpringerLink

No. 6 (1963). Ch'ang Man-suan, “Investigation and Development of engineering methods of determination of the boundaries of open-cut mining with allowance for ore quality and the time factor,” Author's Abstract of Candidate's Dissertation [in Russian], MGI, Moscow (1970). Google Scholar. B. P. Yumatov, Technology of Open-Cut Mining and Basic ...

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(PPT) Calculating Stripping Ratios for Area Strip Mines ...

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 SME’s “Surface Mining” were specifically referenced fStripping Ratio as a ...

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ECONOMIC ASSESSMENT AND MINE PRODUCTION

The 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

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MODELLING THE OPTIMUM INTERFACE BETWEEN OPEN

2021-3-26  ratio of price to cost per ounce of gold, stripping ratio, processed ounces and average grade at the run of mine pad. These indicators were used to compare four individual case study mines; with AngloGold Ashanti’s Sunrise Dam Gold Mine in Australia, which made the OP – UG transition in 2004 and hence develop an OP – UG transition model.

more

Hartman, Introductory Mining Engineering, Thomas, An ...

2008-11-12  Gold Gold mining in Saudi Arabia dates back 5,000 years and search for the metal, throughout history, resulted in the discovery of hundreds of ... 5 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

more

Open-Pit Mining Methods

2017-4-9  The stripping-ore ratio is a basic factor used for determining whether to employ open-pit or underground methods and for determining the economic limits of open-pit mining. Other factors influencing the choice between open-pit and

more

Chapter 2: An introduction to mining - SGU

The amount of waste rock produced relative to the amount of ore produced is called the stripping ratio. For example, a stripping ratio of 2:1 means that 2 tonnes of waste rock need to be mined to mine 1 tonne of ore. The stripping ratio depends on several things, such as the depth and geometry of the ore body, the mining method that is used and ...

more

3.2.6: Maximum Allowable Stripping Ratio (SRmax) ABC

3.2.6: 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 ...

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NPV risk simulation of an open pit gold mine project

2017-5-1  Technical information like ore grade, overburden, inter-burden, stripping ratio, recovery rate; and financial and mineral market information like ore concentrate prices, free risk rate, debt costs, etc., has to be gathered to measure how risky a gold mining project is .

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Technical Report and Mineral Resource and Reserve

2017-2-20  Technical Report and Mineral Resource and Reserve Update for the Nzema Gold Mine, Ghana, West Africa Page i Nzema Mine April 2, 2013 1 Summary The Nzema Gold Mine (Nzema) is located in the Western Region of Ghana, approximately 280km west of the capital, Accra, and less than 20km from the coast at Essiama.

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