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Stripping ratio Wikipedia

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. It is a number or ratio that express how much waste is mined per unit of ore. The units of a stripping ratio can vary between mine types. For example, in coal mining the stripping ratio is commonly referred to as volume/weight. Whereas in metal mining, stripping ratio is unitless and is expressed as weight/weight. A stripping ratio can be expressed as a ratio or as a number.

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Qatar Mining Company (QM) Official Website QM was

Qatar Mining Company (QM), wholly owned by the State of Qatar, was established in 2010 to undertake targeted value accretive investments that maximize value for the State of Qatar through partnerships and investments in the mining and metals sector. To date, QM has established two major projects. One is a subsidiary exploring in Sudan, with the

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What Is a Stripping Ratio? (with picture)

Feb 21, 2021· 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 that must be moved

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How to calculate stripping ratio? ResearchGate

For instance: If the thickness waste rock (overburden) is 100m and the thickness of coal is 50m then stripping ratio would be 2:1. That means one m3 (cubic meter) of coal would need mining two m3...

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(PDF) Stripping Ratios, Pit Limits & Cutoff Grade

This requires the stripping of:The instantaneous stripping ratio is:The overall stripping ratio with bench 8 removed is:125 . 1 000,5 625,5 eous) (instantan SR = = The overall stripping ratio with bench 7 removed is: 48 . 0 500,32 625,15 (overall) SR = = Bench 8 2A 5 = (150) 2 -(125) 2 = 6,875 ft 2 375 . 1 000,5 875,6 eous) (instantan SR = = 60 . 0 500,37 500,22 (overall) SR = = Bench 9 For bench 9:

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Stripping Ratios: What are They and Why are They Important

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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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 ratios from 1:1 to 1:15 or even more.

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stripping ratio calculation in mining Sians Karaoke

PEMODELAN DAN PERHITUNGAN VOLUME CADANGAN . The calculation of coal reserves volume is using two values of stripping ratio which is SR 4 and SR 5 The calculation area of coal reserves volume is divided by out of boundary from dominance mining of PT Multi Prima Universal From calculation result get total calculation of coal reserves volume with SR 4 is equal to 31 046 626 4 tons with overburden

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Stripping ratio Wikipedia

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. It is a number or ratio that express how much waste is mined per unit of ore. The units of a stripping ratio can vary between mine types. For example, in coal mining the stripping ratio is commonly referred to as volume/weight.

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(PDF) Stripping Ratios, Pit Limits & Cutoff Grade

Stripping RatiosThe 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: Stripping RatiosInstantaneous stripping ratio: The stripping ratio for a given push back Overall stripping ratio: The stripping ratio for the total amount of material removed.

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stripping ratio calculation in mining Sians Karaoke

PEMODELAN DAN PERHITUNGAN VOLUME CADANGAN . The calculation of coal reserves volume is using two values of stripping ratio which is SR 4 and SR 5 The calculation area of coal reserves volume is divided by out of boundary from dominance mining of PT Multi Prima Universal From calculation result get total calculation of coal reserves volume with SR 4 is equal to 31 046 626 4 tons with overburden

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(DOC) ANALISIS STRIPPING RATIO DALAM MENENTUKAN

ANALISIS STRIPPING RATIO DALAM MENENTUKAN SUATU METODE PENAMBANGAN BATUBARA DI AREA. Hendra Langitan. BAB II TINJAUAN PUSTAKA ENDAPAN BATUBARA (coal deposit)(KARAPA, 2011),Batubara yang merupakan kelanjutan proses dari pembentukan gambut adalah batuan sedimen yang dapat terbakar, terbentuk dari tumpukan hancuran tumbuhan yang terhumifikasi

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Stripping Ratio Question : mining

Correct, in hard rock mining the ratio is tonnes of waste to tonnes of ore. With an outcropping deposit the first few benches can have a stripping ratio of less than 1 (it's always compared to 1 tonne of ore). It can be a little different in open cut coal mining strip mining, in particular.

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Coal mining Wikipedia

Coal mining is the process of extracting coal from the ground. Coal is valued for its energy content and since the 1880s, has been widely used to generate electricity. Steel and cement industries use coal as a fuel for extraction of iron from iron ore and for cement production. In the United Kingdom and South Africa, a coal mine and its structures are a colliery, a coal mine is a 'pit', and

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stripping ratio gold mining

Stripping Ratio(s) Surface Mining COAL used to excavate hard minerals such as those containing metals like gold, strip ratio in coal mining 9.9 Stripping Ratio Truck Mining es.scribd Stripping Ratio Download as PDF • Distinct mining and stripping areas can be operated or flitches.5 m for small gold mines to 20 m for large open

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coal ton to bcm « BINQ Mining

Stripping Ratio(s) Surface Mining COAL MINING AND GEOLOGY. 24 Nov 2012 Coal miners measure waste in BCM, or bcy, and coal in tonnes or tons. Thus in coal SR is the number of BCM of waste that needs to be »More detailed

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influence of striping ratio on open cast al mining

influence of striping ratio on open cast al mining. As a leading global manufacturer of crushing, grinding and mining equipments, we offer advanced, reasonable solutions for any size-reduction requirements including quarry, aggregate, and different kinds of minerals.

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What Is Open-Pit Mining? (with picture) wiseGEEK

Feb 21, 2021· The stripping ratio in open-pit mining is important because the profitability of that particular mining venture hinges on the ability of the company to gain more from the extraction process than what it expends in order to obtain access to the material.

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strip ratio mining Auto Gyro Africa

Strip itself is easily understood in coal mining where you may have 20 metres of overburden before you expose a 2 metre coal seam. In this case, it is a simple to just divide the length of the overburden by the length of the coal seam (20/2 = 10:1 strip ratio) That is coal mining or strip mining

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March 28, 2014 Rating Matrix Coal India (COALIN) Rating

Company background Coal India (CIL), the mining major, was incorporated in November 1975. CIL is the largest coal producer in the world with coal production of 452.2 MT in FY13. The company supplies coal to sectors like power, steel, cement, defence, fertiliser, etc. As of March 31, 2013, CIL operated 462

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3.2.4: Step 2 -- How Much of the Resource is a Reserve

The second metric is applicable to shallower deposits that are being evaluated for surface rather than underground mining, and it is known as the stripping ratio. Let’s start with stripping ratios, and let’s use a shallow coal seam for our example. Stripping Ratios. The coal seam will be underneath layers of

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v115n8a17 Parametric estimation of capital costs for

The above estimation is based on a stripping ratio of 4:1, and appropriate adjustments can be made to account for higher or lower stripping ratios. For underground mining, the estimates range is between US$40.7 and US$59.1 per ton of rated capacity. This means that a 1 Mt/a rated Indian coal mine will

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