what is stripping ratio coal mining ppt
influence of striping ratio on open cast coal mining
Energy resources: Coal. ... Figure 28me of the geological factors that influence coal-mine planning and reserve assessment. The stripping ratio for the two seams in Figure 28 is less than 7:1 for most of the area to the NW of the fault: the two seams there are economic for surface working and can be considered as reserves.
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(PDF) Surface Mine Design
surface mining methods; open pit planning and design; open pit terminology; stripping ratio; factors governing strip mining; calculation of overburden ratio; initial data collection checklist ...
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stripping ratio and break even stripping ratio
Download stripping ratio and break even stripping ratio and more Lecture notes Mining Engineering in PDF only on Docsity! STRIPING RATIO AND BESR IN OPEN PIT MINING Cont. 2.2.2 Open pit mining …
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Coal and Coal Mining
Surface mining – involves stripping off overburden to access coal resources. Overburden is the layers of soil and rock that overlie a coal bed. Surface mining is limited by …
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Coal mining
Coal mining - Underground, Surface, & Drilling: The various methods of mining a coal seam can be classified under two headings, surface mining and underground mining. Surface and underground coal mining are broad activities that incorporate numerous variations in equipment and methods, and the choice of which method to use in …
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How a Continuous Miner Works in 2023
Coal mining operations use these large machines to remove coal reserves from underground coal seams. ... Throughout the split and rendering process, the roadways leave a six-to-ten-meter fender, or …
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IFRIC 20 — Stripping Costs in the Production Phase of a Surface Mine
IFRIC 20 considers when and how to account separately for the benefits arising from the removal of mine waste materials ('overburden') to gain access to mineral ore deposits, as well as how to measure these benefits both initially and subsequently. IFRIC 20 was issued on 19 October 2011 and applies to annual periods beginning on or …
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Calculating Stripping Ratios for Area Strip Mines Mnge ppt …
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 …
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Coal Mining and Processing
Although the United States has the vast coal resource described in the previous chapter, perhaps as much as 4 trillion tons, the key issue for policy makers is the amount of coal that is economically recoverable.This is …
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Stripping ratio | mining | Britannica
Other articles where stripping ratio is discussed: 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. Stripping ratios can also consider the selling price of coal, and a certain minimum profit can be added to the total …
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Stripping Ratios: What Are They and Why Are They …
A strip ratio, or stripping ratio, is an important measurement related to the open-pit mining process.Put simply, it represents the amount of waste material, also known as overburden, that must be ...
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Mining | PPT
Surface mining techniques include placer mining for deposits close to the surface, strip mining which removes overburden, and mountaintop removal which levels entire mountains. Underground mining uses drifts, slopes, or shafts to access deep materials. ... (MTR) is a relatively new form of coal mining that involves the mass …
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Coal mining
Coal mining - Underground mining: In underground coal mining, the working environment is completely enclosed by the geologic medium, which consists of the coal seam and the overlying and underlying strata. Access to the coal seam is gained by suitable openings from the surface, and a network of roadways driven in the seam then …
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sbm/sbm what is stripping ratio coal mining ppt.md at …
sbm what is stripping ratio coal mining ppt13《()》1().doc 2017610&ensp·&ensp13《()》1() Northeastern university 14 spring 13 autumn,"mining science (2)" online homework 1 Exam time: 100 test time: Single topic selection Multiple choice True or false (10 questions in total,40 points.) what is …
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a Surface Mine Stripping Costs in the Production …
A mining entity may continue to remove overburden and to incur stripping costs during the production phase of the mine. The material removed when stripping in the production phase will not necessarily be 100 per cent waste; often it will be a combination of ore and waste. The ratio of ore to waste can range from uneconomic low grade to
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Stripping Ratios, Pit Limits & Cutoff Grade Optimization
In strip coal mining operations, the following are sometimes seen: SR = Overbuden Thickness (ft) Coal Thickness (ft) SR = Overburden (yd 3 ) Coal (tons) Stripping Ratios …
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(PDF) Mining Methods-Part II: Surface Mining-Planning and Design …
S tripping ratio or strip ratio refers to the ratio of the vol ume of overburden (or waste material) required to be handled in order to extract some volume of ore.
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Stripping Ratio in Open-Pit Mining | SpringerLink
Elements that influence production stripping ratio include natural terrain and topography and geological conditions in the mining area, stripping sequence in the pit …
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Lecture 7c Calculating Stripping Ratios for
Numerical Calculation of. Stripping Ratios. Average End Area from Topo. • Use a digitizer or Autocad Digitizing. Function. • 1700 ft Contour Area is 53.452,860 ft2. • sits directly above coal seam - half way. down to next …
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A 101 On Strip Mining And How It Is Used To Extract Coal
One of the ways of Extracting Coal from the ground is called strip mining. This technique comes under surface mining and is used when the coal is found very near the top of the land. To get to the coal one has to remove the top layer of rock and soil. The exact steps that are carried out in strip mining are detailed below. 1.
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PPT
Strip Mining. Strip Mining. Soraya Sadeghi, Nicole Mehdian, Dami Kim. What is Strip Mining?. Strip mining is the mining of ore or coal from an open mine. Process of Strip Mining. Coal stacked up in layers in Earth. Strip miners blow up a portion of the Earth using bulldozers and dynamites. 480 views • 13 slides
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Ministry of Coal, Government of India
Standard stripping ratio - the ratio of "overbudern (OB) to be removed" to "the mineral to be produced" during the whole project life. Suppose in an opencast mine, 20 lakh CuM OB will be removed during the life time (suppose 15 years) against the production of 10 lakh Te of coal, the standard stripping ratio will be 2.1
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stripping ratio in coal mining
Stripping Ratio Coal Mining Comp - montagetapes.nl. Stripping Ratio Coal Mining Comp. The units for stripping ratios can vary and usually depends on the geological properties of the deposit and the commodity mined It can be expressed in tonnes t or cubic meters m 3Usually for coal cubic meters m 3 or tonnes t are usedHowever for hard rock …
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Rational economic stripping ratios
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 block. The ratio is based on …
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Design of openpit mining | PPT
Estimation of Coal, OB & Stripping ratio Contd. Rough assessment is given below • Assuming Pit slopes of 450, the Quarry floor and Quarry surface are delineated • Volume of Coal & OB = Average area x Average depth - (A) • Average area = (Quarry surface area + Quarry floor area) / 2 • Average depth = (Minimum depth + …
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Surface Coal Mining Methods in Australia
Open cut mining methods strip mining Large-scale open cut coal mining operations commenced in Australia in mid 1960s and since then there has been significan t developments in this method of mining. The mines are now operating at significantly higher annual tonnages, growing deeper, more complex and ...
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Task 3.14.1 Evaluation of stripping techniques
every other mine and with selected international mines in order to identify the critical performance areas that need to be improved upon in order to make South African surface coal mines more competitive in the international market environment. On average, the South African surface coal mining industry recorded a lower stripping
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Evaluation of different methods of pillar recovery in coal mining …
The room-and-pillar technique is a self-supporting mining method in which part of the ore is left unmined as pillars. To increase the mining efficiency, the pillars are later recovered partially or completely. This research aims at evaluating and comparing four methods of pillar recovery, namely, 'pocket and wing', 'open ending', 'split and fender', …
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Open Pit Design Economics
In general, during the initial stage of the mining, the stripping ratio is high. As mining progresses the SR decreases, reaching a minimum before increasing again with greater mining depth. At this point, the stripping ratio is a controlling factor in comparing the cost of mining by open pit versus underground methods. Slope Angle
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Lecture 4 Calculating Stripping Ratios for Area …
Two major technical constraints involved in the determination of such schedule are: (i) the feasible combinations of ore and waste production (stripping ratio), and (ii) the ore production rate that meets the mill feed …
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