break even stripping ratio example for coal mining

Break-even stripping ratio | Britannica.com

The break-even stripping ratio is a function of ore value and the costs involved. Read More. Schematic diagram of an underground coal mine, showing surface facilities, access shaft, and. In coal mining: Contour strip mining. If the break-even stripping ratio remains favourable, further cuts into the hillside will be made.

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Determining Stripping Ratio - Basic Mining Techniques

Apr 4, 2016 ... For Example: Determine the Stripping Ratio of the ore section (green zone) shown below: We know; SR = Waste/Ore, therefore;. SR = 2500/5000 = 1:2 (i.e. 0.5) (i.e. one unit of waste is removed to recover 2 units ... The maximum allowable Stripping Ratio (SRmax) defines break even stripping ratio (BESR).

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Stripping ratio and pit limit - Basic Mining Techniques

Jul 26, 2017 ... For instance the overall stripping ratio of two (2) benches will be the ratio of sum of waste to ore. This is purely a physical ratio of total waste to total ore. [Note: Equation 2 is expressed in tonnes (t), can also be expressed in volume (m3)]. 4. Maximum allowable (break-even)stripping ratio. The maximum...

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1 4 Stripping Ratio | Ratio | Surface Mining - Scribd

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 per te : Rs 2500/Mining and preparation cost per te: Rs 500/Overburden Handling cost per cubic meter: Rs 100/-. Calculate the BESR. PSM: Profit earned in Rs/te of ore...

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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 ... 10 Your Turn Use What You Have Learned About Calculating Stripping Ratios for Strip Mines and Break Even Limits to Determine the Size of a Coal Reserve Do...

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

Break-even stripping ratio Typical Calculation Process • Find Costs, Ore Grades, Recoveries • Calculate Gross Recoverable Ore Value (Gross Revenue/ton-ore) • Calculate Production Costs ($/ton-waste) • Calculate Net Recoverable Ore Value (Net revenue/ton-ore) • Calculate BESR: BESR = (Net Revenue)/(Stripping...

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Modeling for the Steady State Production of Large ... - ethesis@nitr

May 13, 2013 ... The point beyond which the mineral/ coal cannot be economically extracted out is called the break even stripping ratio. Factors which play a great role in the stripping ratio calculation are: - Cost of stripping. - Extracting cost of mineral/coal. - Percentage of rejects. - Cleaning cost of coal or ore dressing cost.

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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. Stripping ratios are typically reduced to...

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Surface Mining - ResearchGate

v) Pit diameter 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. Dr. H.Z. Harraz Presentation. February 2, 2016. 2) Limit or Ultimate Pit Definition: 2.1) Introduction. 2.2) Manual Design. 2.3) Computer...

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Mine Plan Justification - Whitehaven Coal

Resources definition - Pit limits and coal resource boundaries;. •. Mine sequencing;. •. Waste dump determination – Northern Overburden Emplacement Area. (NOEA) and ...... The breakeven strip ratio was estimated at approximately 20:1 bcm/t ROM coal for the current metallurgical and thermal coal product mix. Higher strip.

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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. ... For example, if the mining company must extract one part of ore to three and a half parts of waste in order to break even, it stands to reason that the company will seek to look for mining...

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What Is the Optimal and Sustainable Lifetime of a Mine? - MDPI

Feb 11, 2018 ... its lifetime must be optimized under economic conditions, for example, according to Taylor's Rule. ... Keywords: sustainable mining; lifetime of a mine; break-even cut-off; sustainable cut-off; resource efficiency ..... cut-off, the so-called marginal stripping ratio, defined as the maximum allowable waste:ore ratio.

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What is the mining process of coal? - Quora

Apr 8, 2017 ... EDIT 1 :- For the coal deposits lying at the lesser depth, the surface mining methods of extraction of coal is generally used. While mining the coal by surface mining method ,stripping ratio (tons of recoverable mineral/ore reserve produced per cubic meter of overburden ) and break-even stripping ratio (the...

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Estimating Average Total Cost of Open Pit Coal Mines in ... - InfoMine

such as coal quality, stripping ratio, as well as other possible explanatory variables is less important. Estimation of ... deposit has a strong influence on production rate (Smith, 1997), even though coal reserves are available ... called 'Mine and Mill Equipment Cost Calculator' that calculate all equipment cost in feasibility. This.

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introduction to mining - Ciencia Viva

However, coal and industrial mineral deposits are often not so designated, even if their profitability has been firmly established. If the excavation used for mining is ..... Open pit or open cast mining is usually employed to exploit a near-surface deposit or one that has a low stripping ratio. It often necessitates a large capital...

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analisis stripping ratio optimal berdasarkan perhitungan net present ...

One of the important aspects in planning the coal mining is Stripping Ratio (SR). In this research, two types of calculation in Stripping Ratio had been done, which are the Break Even Stripping Ratio (BESR) and the Optimal Striping Ratio. Break Even Stripping Ratio is the limit of stripping ratio that could be used when the...

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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...

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Open-Cast-Mine-Planning - Mining and Blasting

P.D. RATHI. Sr. Mining Engineer. OPEN CAST MINE PLANNING. Factors that influence planning: 1) Demand of coal. a. Countrywide demand b. Regional demand ... f. Geotechnical parameters of the rock. 2) Availability of funds/capital. 3) Break even Stripping ratio/cost economic analysis. 4) Production targets. 5) Degree of...

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Productivity in mining operations: Reversing the downward trend ...

We have deliberately excluded ore grade from the calculation. The three elements are then linked with a measure of physical mine output, which is not affected by changes in the ore grade and stripping ratio. The basis for MPI is the well-established Cobb-Douglas production-function equation used to measure productivity...

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PENENTUAN BREAK EVEN STRIPPING RATIO (BESR) DENGAN ...

30 Mei 2016 ... Abstract. ABSTRACT PT. Bukit Asam (Persero) Tbk is one of the state owned business entities operating in coal mining field of activity. PT. Bukit Asam (Persero) Tbk has 2 units of mining which is Mining Unit of Tanjung Enim (UPTE) located in Tanjung Enim, Lawang Kidul, Muara Enim, South Sumatera and...

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9 Coal - EPA

Stripping Ratio = Overburden Yard / Coal Production .... affecting productivity at such mines are identified. For example, underground mines do not have stripping ratios. Productivity estimates for these mines largely depend ...... negotiations even as coal volumes shipped by rail were off 9.3% from year-to-date 2008 levels as.

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Curriculum Vitae - International Journal of Engineering (IJE)

Sep 3, 2010 ... 31) Osanloo, M, the Possibility of Using CO2 + H2O AS A Solvent for Extraction of Deep and thin Coal, Journal of. Amir Kabir Tehran 1984 (1364) No. ..... 75) Mortezagholi Osanloo - Afshin Akbari Dehkharghani - , "Developing breakeven stripping ratio graph for sungun copper project" , , Iran (Islamic...

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D) Coal resource availability, recoverability and economic ...

significantly smaller than total coal resources. For example, the current maximum depth for underground coal mining is approximately 3,000 to 4,000 ft (914.4 to 1219.2 m). Thus, ... between an analysis using a break-even economic hurdle and inclusion of at ..... extensive, very thick, low stripping ratio resources in the PRB.

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4th Semester - NIT Raipur

70. 120. 4. 5. Mining Engg. MI20415(MI). Underground. Coal Mining. 3 1 -. 20 15. 15. 50. 70. 120. 4. 6 Mining Engg. MI20416(MI) Surface Mining-I 4 1 -. 20 15. 15. 50. 70. 120. 5 ... Tutorial Periods/Week. Practical .... parameters of Open pit design; Design of Benches, Ultimate pit, Stripping ratio, Break even stripping ratio...

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Strip Mining: A Policy Evaluation - Berkeley Law Scholarship ...

At stake in the decision on national coal mining policy are a number of important values. Some have argued, for example, that only. * B.A. 1970, Harvard; M.P.A. 1975, Princeton; J.D. 1975, Yale. Member, Cali- fornia State Bar. 1. Coal is not the only mineral subject to surface mining. ('For a discussion of the terms "strip...

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stability, capability, potential - Anglo American

Dec 9, 2014 ... The graph depicts the Pt Price required per Pt oz to breakeven based on Operating costs and SIB. Operating costs defined as On and Off mine Costs netted off with by-product revenues. (Pd Rh Au Ni Cu).Twickenham mine excluded as still in project phase. (1) SIB includes development and stripping capex.

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geovia minex - Dassault Systèmes

coal projects. • Accurately measuring coal quality and washability. • Reducing costs control related to waste removal and haulage. • Reducing data duplication. • Improving ... and generate a final pit that is break even or optimal at its limits, using the ... provides both vertical and inclined strip ratio calculations. Open pit mine...

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Rio Tinto Investor Seminar, London - 11 December 2013

Dec 11, 2013 ... with low-cost productivity solutions, and the deferral of greenfield mine development. As a result of this breakthough ... industry's product capacity operating at below cash breakeven levels. ...... Overall strip ratios have dropped from almost 4:1 to 2:1 as a result of the Phase 3 pushback. During 2017, the strip...

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Mining Basics | The Critical Investor

To get a visual impression of things like for example exploration, or open pit mining or underground mining, I would suggest to just google these terms for images, and you will .... Block caving - An inexpensive method of mining in which large blocks of ore are undercut, causing the ore to break or cave under its own weight.

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Glossary of Mining Terms - RocksandMinerals.com

Abutment — In coal mining, (1) the weight of the rocks above a narrow roadway is transferred to the solid coal along the sides, which act as abutments of the arch of strata spanning the roadway; and (2) the weight of ..... Factor of safety — The ratio of the ultimate breaking strength of the material to the force exerted against it.

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Second Supplementary Individual Expert Witness Report Financial ...

Mar 9, 2015 ... I have broken out the Financial Model's catch all “Selling Costs” to separately detail real: a. Rail costs ... These calculations have affirmed my view that the Carmichael coal project to be both financially unviable .... I have conservatively assumed the Carmichael coal mine will generate scale and strip ratio.

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— Comprehensive Mining Software Solutions

The Mining Solution. ®. 2. 3. TABLE OF CONTENTS. Intro to Carlson Mining. 2 - 3. Carlson Geology. 4 - 7. Underground Mining. 8 - 9. Carlson Surface Mining. 10 - 11. Basic Mining / SDPS. 12 ... coal industry utilizes Carlson Mining software – and our commitment ... Create strip ratio grids to determine mineable reserves.

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Chapter 9 MINING, TRANSPORTATION, AND ... - Science Direct

any early underground coal mining, the size of the mine was limited by two factors: the availability of timber for ... proximate and ultimate analyses and calorific value determinations from outcrop samples or drill cuttings .... The stripping ratio (expressed as cubic meters of overburden removed per tonne of lignite) increases...

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9 Practical Solutions to Mining Problems

spoils uphill; and the downhill mode, where the coal seam is again dipping but the dragline spoils downhill. ... mine. Later, Erdem (1996), Erdem & Çelebi (1998) and Erdem et al. (1999) introduced design guidelines for the pullback stripping method for a flat-lying coal ..... quahty views are obtained Figure 6 is an example.

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Recommendations for reforms in coal mining space

Feb 23, 2018 ... Brookings India is working on a multi-year study on coal sector in the country. The objective of this research similar is to the objective of India's coal vision 2030, this is, to identify key coal sector trends, analyse existing policies, and devise suitable frameworks to enable future optimal utilisation of coal for the...

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coal mining in structurally complex geological settings – examples ...

can often be repeated and stripping ratios are improved for attractive opencast mining. The situation in deep mines ... Coal mining in structurally complex geological settings – examples from South Wales and South America. Pp. 133-146 in Scott, P.W. .... dipping thrust sheets which are broken up by E-W and. NW-SE striking...

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A Review of Operations Research in Mine Planning - Inside Mines

Apr 7, 2010 ... simulation, in particular, have been applied to both surface and underground mine planning problems, including mine design, long- and .... the ore-to-waste (stripping) ratio with the cumulative value in the pit boundaries. ... to a break-even level depending on the overall grade composition of the mine.

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Coal Industry Competitiveness Assessment - NERA

Coal Industry. Competitiveness. Assessment. Report on the Framework, Baseline Score,. Insights and Opportunities. December 2016 ..... To assess competitiveness effectively, a clear definition of the scope of the measurement is required. ..... of Australia's coal industry, many mines are operating close to the breakeven.

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Expert Report of SRK Consulting - italaw

Oct 6, 2015 ... Dr. Rigby Expert Opinion Report – Bear Creek Mining v. Republic of Peru ..... Table 6-3: LoM Costs: Cut-off Grade Calculation Demonstrating Ag Price for 14g/t Breakeven COG ....................... 22 ...... years at the average grade of 36.12 g/t and at the average stripping ratio of 0.81 waste/t ore. The tonnage...

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Opencast coal mining at Kriel Colliery - SAIMM

Thus, the total coal requirements increased from. 8 million tons per annum to 8,5 million tons per annum, consisting of 4 million tons from underground and 4,5 million tons from the opencast mine. Draglines Required. When opencast mining of the field was first discussed, a stripping ratio of 6:1 was used to determine the.

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