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Stripping ratio - Wikipedia

In 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. ...

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 …

Stripping ratio | mining | Britannica.com

In 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.

What is stripping ratio in mining? - Quora

In 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...

Stripping Ratios, Pit Limits & Cutoff Grade Optimization ...

CHAPTER 8 Stripping Ratios, Pit Limits & Cutoff Grade Optimization Dr. Teuku Andika R Putra USM 2014 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.

Strip Mining for Coal - YouTube

2015-09-11· Almost 20 years since the strip mine began and it is still going strong here in Stellarton, Nova Scotia. In another five or six years time the mining should be complete and will mark the end of ...

Rational economic stripping ratios - tandfonline.com

Identical strip ratios for two blocks with different seam thickness. However, by simply anticipating the practicalitie of minins g to preserve the in-situ coal quality, different economic stripping ratios are to be expected for the two blocks. The mode of preparation for extractio n and extractio onf the exposed coal will be the same for both block bus t the run o f mine coal recovery wil bl e ...

Surface Mining Techniques used in the Oil Sands | Oil ...

The strip ratio (SR) is the simplest measure of mining efficiency. Strip ratio is the fraction of overburden (or waste ore) versus the weight of bitumen-rich oil sands. A strip ratio of 2 is considered high but feasible if the ore grade is high enough.

Break-even stripping ratio | Britannica.com

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.

What Is a Stripping Ratio? (with picture) - wisegeek.com

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.

coal mining stripping ratio - earljones.co.za

coal mining stripping ratio - rodekruisnijmegengalanl. Rational economic stripping ratios: International, ABSTRACT: The economic stripping ratio used to define an economic mining block in an open pit coal mining situation is rationalised by considering the time value of money, and defining run of mine recovery and mining cost as dynamic ...

Ovoot Coking Coal Project - Aspire Mining Limited

A strip ratio of 7.7:1 (BCM waste: tonne of coal); Preferentially targeting the Upper Seam with a relatively high proportion of low ash coal; Mining of 5.2Mt of ROM coal (at a 2% moisture on an as received basis) producing 5Mt of saleable coal.

Can Indonesia's coal mines maximise strip ratios and boost ...

The declining trend in strip ratios for Indonesia's coal mines have allowed producers to survive in periods of lower coal prices through reduction in production costs and margins. However, producers are likely to have sterilised coal and jeopardised future coal reserves with continuous mining in

strip ratio in gold mining - auto-spec.co.za

Strip Ratio The stripping ratio is the most influential economic factor in the evaluation and planning of open pit coal mines. It represents the volume of rock both above and within (partings) coal seams expressed in Bank Cubic Metres (BCMs) which must be mined to obtain 1 tonne of raw or clean coal.

Chapter 2: The Environmental Effects of Strip Mining - The ...

This process continues along parallel strips of land so long as the ratio between the overburden and the coal seam, called the stripping ratio, makes it economically feasible to recover coal. Mining may cease in a particular area, for example, where the coal seam becomes thinner or where the seam dips further below the surface.

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.

waste stripping mining - samatour.fr

In 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.

Calculating Stripping Ratios for Area Strip Mines Mnge ppt ...

Calculating Stripping Ratios for Area Strip Mines Mnge ppt video ... Stripping Ratio as a Fundamental Ability to surface mine depends on the value of the ore being high enough to offset the cost of Overburden Removal Stripping Ratio determines relative amounts of each to be moved If ... 9 The Coal Area Strip Mine Formula ...

what is stripping ratio coal mining - overlandconnection.com

Mine closures in Indonesia's Jambi highlight coal industry,- what is stripping ratio coal mining,29 Nov 2012, JAKARTA, Nov 29 (Reuters) - Nearly 90 percent of coal mines in Indonesia's Jambi province have closed, Jambi's stripping ratios, the amount of dirt that needs to be removed to uncover coal, are typically between 1:2 and.1 4 ...

Coal Mining Stripping Ratio - nnguniclub.co.za

good strip ratio for a coal mine - humanrightsforum. In coal mining what is a good strip ratio The Q&A wiki 1 Overburden O/B 2 Coal ore 3 coal mining stripping ratio Zenith Hot-sale Products Glossary of Mining Terms vibrating sieve separator.

effect of stripping ratio in coal mining | Solution for ...

Chapter 2: The Environmental Effects of Strip Mining – The Strip … EFFECTS OF. STRIP MINING A ll mining operations have a disruptive effect on the … so long as the ratio between the overburden and the coal seam, called the stripping ratio, …

chidliak: Strip Ratio

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)