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coal mining stripping ratio

CHAPTER 11 Mining Technology Princeton University

basin which produces Federal coal. Area strip mining proceeds by first making a box cut into the earth to uncover the initial strip of coal that is to be mined. The strip of coal uncovered will vary from 100 to 200 ft in width and from onequarter to several miles in length. The actual size of the cut will be determined by the thickness of

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Breakeven stripping ratio Britannica.com

In coal mining: Contour strip mining. If the breakeven 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.

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Stripping Ratio Calculation In Mining czeu.eu

what is stripping ratio 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 be handled in order to extract some volume of . Get Price And Support Online stripping ratio in coal mining crusherasia

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Indonesia could deplete coal reserves by 2033 PwC Reuters

Mar 07, 2016 · However, declining stripping ratios and profitability have led to a drop in coal reserves of 30 to 40 percent, Diran said, noting that the survey found coal reserves of between 7.3 billion and 8.3

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(PDF) Stripping Ratios, Pit Limits & Cutoff Grade

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.

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U Optimal production rates in opencast coal mining: A

The mining rate can refer to coal extracted per annum or to the waste stripped per annum. A mining practice in which the higher quality coal is mined first in the mine life. This generally creates higher revenue streams early in the operation but can have limiting consequences later on.

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How to calculate stripping ratio? researchgate.net

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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Surface Strip Coal Mining Handbook sacea.org.za

1 introduction to surface strip coal mining 1.1 fundamental concepts and definitions 2 1.2 surface coal mining 5 1.3 production cost and stripping ratio analysis 8 1.3.1 stripping ratio for multiple seams 11 1.4 basic profit function analysis 13 2 geology and exploration 2.1 geology of south african coal

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Cost Models of Theoretical Mining Operations CostMine

This mine is an open pit mine producing 5,000 tonnes ore and 5,000 tonnes waste per day. Rock characteristics for both ore and waste are typical of those of granite or porphyritic material. Operating conditions, wage scales, and unit prices are typical for western U.S. mining operations. All costs listed are in 2012 US$.

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(PPT) Calculating Stripping Ratios for Area Strip Mines

The Coal Area Strip Mine Formula • Strip Ratio = OB Thickness (in ft) * 11.11/ Coal thickness in inches – Assumes coal is 80 lbs/ft^3 (good for bituminous) – Area Strip Mine Geometry – Geologic Stripping Ratio – no accounting for rehandle or less than coal recovery Your Turn • Use What You Have Learned About Calculating

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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.

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Can Indonesia's coal mines maximise strip ratios and boost

Dec 16, 2016 · Can Indonesia's coal mines maximise strip ratios and boost reserves? producers are likely to have sterilised coal and jeopardised future coal reserves with continuous mining in lower strip areas. Our analysis suggests that the top 16 producers in Indonesia has been able to increase reserve, but other coal producers have experienced a

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Lecture 4 Calculating Stripping Ratios for Area Strip

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 SMEs Surface Mining were specifically referenced Stripping Ratio as a Fundamental

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Overburden Removal Surface Mining SlideShare

Jul 21, 2017 · However, in hard rock mining to define the stripping ratio in the example of Fig. 1, consider mining of the ore ABC at depth h. Having defined the slope angle at this mine section, the waste (overburden) section AICD must be re moved. The ratio of this overburden stripped to mine the ore is known as the average stripping ratio (SR).

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IFRS First Impressions home.kpmg

average lifeofmine stripping ratio approach, while others expense such costs as incurred, or follow the US GAAP approach of alloing all production stripping costs to inventory produced in the period. For companies that currently expense these costs, the interpretation will mean not only a change in for example coal.

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COAL Trollope Mining Services tmsgroup.co.za

HCI KHUSELA PALESA MINE Gauteng. The Palesa Coal Mine, loed 37 km North of the town Bronkhorstspruit, is the largest of the two HCI Coal Mines. Operations will ultimately comprise of opencast mining of coal 380 000 T/MTH @ strip ratio of 2.3 M3/T. The opencast mining scope of work includes ongoing rehabilitation.

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Economic Surface Mining of Multiple Seams SAIMM

Economic Surface Mining of Multiple Seams By THOMAS V. FALKIE' :md WlLLIAM E. PORTERt SYNOPSIS A, Xeological and mining conditions become more complex, and as overall mining economics become more marginal, shortand longrange decisionmaking regarding muIliplescam surface mining becomes more difficult.

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Cline Mining Mining Company

In February 2018, Australian mining company Scotgold Resources Ltd, received approval for its Cononish Gold and Silver mining project an undertaking for reviving the derelict gold and silver mine in Glen Cononish some 50 miles away from Glasgow.

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Break Even Stripping Ratio Example For Coal Mining

stripping ratio in coal mining crusherasia. stripping ratio in coal mining . The breakeven stripping ratio is a . stripping ratio varies with the quality of the coal/ore making up the deposit. for example, . Get Price And Support Online

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Stripping Ratio Calculation In Mining czeu.eu

what is stripping ratio 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 be handled in order to extract some volume of . Get Price And Support Online stripping ratio in coal mining crusherasia

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In coal mining what is a good strip ratio answers.com

It can be either one, depending on how the mining is conducted. In past years, areas were strip mined, and waste materials from the mining were left to pile up in many cases, unsafely.

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Analysis of Highwall Mining Stability The Effect of

feet to 1,200feet of additional recovery when the economic stripping ratio is reached in contour mining or in slot mining when surface surface coal mining technique requiring four to five miners per shift. Volkwein, Analysis of Highwall Mining Stability The Effect of Multiple Seams and Prior Auger Mining on Design David Newman,

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what is stripping ratio coal mining Mine Equipments

In coal mining what is a good strip ratio Wiki Answers What Is Stripping Ratio?a. Measures relative deposit depth. Q: How important is depth in surface mining?? *

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break even stripping ratio example for coal mining

break even ratio for australia coal mining break even stripping ratio example for coal mining event transcript in underground mining, block caving is the only method with the costs comparable to high stripping ratios, and environmental issues have become. Chat Online Coal Mining Stripping Ratio

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