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coal mining stripping ratio

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Stripping Ratios: What are They and Why are They Important? | INNJun 27, 2017 . 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 order to extract a given amount of ore. That said, stripping ratios are not only about the volume of unwanted.coal mining stripping ratio,Determining Stripping Ratio - Basic Mining TechniquesApr 4, 2016 . Stripping ratio simply refers to the amount of waste handled in order to recover certain amount of ore.Surface Strip Coal Mining Handbook - sacea1 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.

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1 4 Stripping Ratio | Ratio | Surface Mining - Scribd

In case of simultaneous back filling thickness ratio helps in knowing whether the backfilled surface will be lower than, equal to or above the pre-mined land surface level. Break even stripping ratio (BESR) In case of coal deposits,. In case of other deposits,. BESR helps in determining the pit limit. Example: Selling cost of coal.

Surface Coal Mining Methods in Australia - IntechOpen

Mar 9, 2012 . Large-scale open cut coal mining operations commenced in Australia in mid 1960s and since then there has been significant developments in this method of mining. The mines are now operating at significantly higher annual tonnages, growing deeper, more complex and operating at higher stripping ratios.

Economic Surface Mining of Multiple Seams - SAIMM

From a physical standpoint, the capability of the stripping machine is the limiting factor. From the economic standpOint, the limiting factor is the familiar stripping ratio which is used in making a feasibility study. 'Stripping ratio' as used here in reference to coal mining is de£ned as the cubic yards of overburden which must.

Surface Strip Coal Mining Handbook - sacea

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.

Optimal production rates in opencast coal mining - University of .

Nov 15, 2011 . Thus by mining from a low saleable strip ratio to a higher strip ratio will generally result in the highest profit margins early in the life of the mine, resulting in higher NPV values. By considering the thicknesses of the soft and hard overburden, as well as coal thicknesses, it can be seen how these contribute.

Rational economic stripping ratios

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 variables dictated by the thicknesses, depths and number of seams within a mining.

Surface Coal Mining Methods in Australia - IntechOpen

Mar 9, 2012 . Large-scale open cut coal mining operations commenced in Australia in mid 1960s and since then there has been significant developments in this method of mining. The mines are now operating at significantly higher annual tonnages, growing deeper, more complex and operating at higher stripping ratios.

Economic Surface Mining of Multiple Seams - SAIMM

From a physical standpoint, the capability of the stripping machine is the limiting factor. From the economic standpOint, the limiting factor is the familiar stripping ratio which is used in making a feasibility study. 'Stripping ratio' as used here in reference to coal mining is de£ned as the cubic yards of overburden which must.

What is STRIPPING RATIO? What does STRIPPING RATIO mean .

Aug 24, 2017 . STRIPPING RATIO meaning- STRIPPING RATIO definition - STRIPPING RATIO explanation. Source: Wikipedia article, adapted under screativecommons/licenses/. license. SUBSCRIBE to our Google Earth flights channel - s.youtube/channel/UC6Uu. In mining, stripping ratio.

24th clip Surface Mining (Stripping Ratio)

Nov 22, 2016 . Mining Engineering and Basic Knowledeg.

Stripping Ratios, Pit Limits & Cutoff Grade Optimization .

In strip coal mining operations, the following are sometimes seen: Overbuden Thickness (ft) Overburden (yd 3 ) SR = SR = Coal Thickness (ft) Coal (tons) Stripping Ratios Instantaneous stripping ratio: The stripping ratio for a given push back Overall stripping ratio: The stripping ratio for the total amount of material removed.

Surface Mining - ResearchGate

Feb 2, 2016 . vi) Water Damage vii) Strip Ratio (SR). 1.8) Open-pit mining sequence. 1.9) Various open-pit and orebody configurations. We will explore all of the above in Topic 6. Prof. . ❑Large bucket-wheel excavators of the kind used in European coal mines have not been applied to metal mining, because this.

Indonesian coal producers cut costs to sustain profits as prices fall .

Oct 29, 2014 . LOWER STRIPPING RATIOS A Sydney-based coal market analyst noted major Indonesian coal miners were also continuing to lower their mine stripping ratios. The ratio of overburden moved to access coal is the key economic factor in open pit operations, which comprise the majority of Indonesia's coal.

Overburden Removal - Surface Mining - SlideShare

Jul 21, 2017 . For example, it is quite different in the coal industry where it refers to the cubic yards (bank) of overburden removed per ton of coal mined. 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.

Details of the Open pit Mine Model.

Jul 25, 1977 . Coal. Surface Mining. 0.88. 1.94. 0.15. Underground Mining. 4.34. 6.78. 4.00. SOURCE: Table C.4 of Operations Research, Inc., Report for the ... Annual ore production rate. Annual waste rock + lean ore extraction rate. Stripping ratio. Mine life. Tons of material produced over a 20 year mine life. Ore.

IFRS Developments for Mining & Metals: Accounting for waste . - EY

the component(s) of a mine. How we see it. The requirement to identify the component of the ore body for which access has been improved is a new requirement and differs from the life-of-mine average strip ratio approach, which is widely used in practice. While it is possible, in some instances, that the removal of waste at.

Availability of Coal Resources for Mining in Illinois - Illinois State .

Geology, Coal Quality and Mining History of the Shawneetown Quadrangle. 4. FACTORS AFFECTING THE AVAILABILITY OF COAL. 9. Surface Minable Coal. 9. Depth of Seam. 9. Thickness of Seam. 9. Stripping Ratio. 9. Thickness of Bedrock and Unconsolidated Overburden. 11. Size and Configuration of Mining Block. 11.

status of surface mining - Hacettepe Üniversitesi

The ratio of the total volume of waste to total volume of ore is then the overall stripping ratio. Major Steps in Surface Mining Development. Jones (1977), SME Mining Eng. Handbook, has outlined 10 major steps involved in planning and developing a surface coal mine. These steps can take up to 10 years and require.

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

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.

AME Group - Feature Article Detail

Transferring the attitude of China's steel industry to the metallurgical coal industry, the same outcomes can be achieved by focusing on improving the yield as well as decreasing the strip ratio for open-cut mines. Every major metallurgical coal-producing country has significant room to move on at least one of these criteria.

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

May 1, 2016 . SURFACE MINING ≠ STRIP MINING: Although sometimes mistakenly referred to as strip mining, oil sands is actually mined from an open-pit below several meters of overburden. Strip mining is the mining of a relatively flat deposit very close to the surface, commonly used in coal or phosphate industries.

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