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(PDF) Stripping Ratios, Pit Limits Cutoff Grade ...

Optimum cut-off grade policy for open pit mining operations through net present value algorithm considering metal price and cost escalation By Raul Cezar Maximizing the net present value by applying an optimal cut-off grade for long-term planning of the copper open pits

Stripping Ratios: What are They and Why are They

Oct 31, 2018 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

Stripping ratio - Wikipedia

In surface mining, stripping ratio or strip ratio refers to the amount of waste (or overburden) that must be removed to release a given ore quantity. It is a number or ratio that express how much waste is mined per unit of ore. The units of a stripping ratio can vary between mine types. For example, in coal mining the stripping ratio is commonly referred to as volume/weight. Whereas in metal mining, stripping ratio is unitless and is expressed as weight/weight. A stripping ratio can be expressed as a ratio or as a number.

Determining Stripping Ratio - Basic Mining Techniques

Apr 04, 2016 The maximum allowable Stripping Ratio (SR max) defines break even stripping ratio (BESR).This represents the highest possible units of waste that can be handled. If the SR exceeds the BESR then the operation will be uneconomical as the income generated by the ore is insufficient to offset the costs incurred in mining.

What is stripping ratio in mining? - Quora

Answer: 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

Whats the average stripping ratio of open pit mines

Aug 31, 2016 Hardrock would be in the region of 12t:1t but when Platinum was booming we say SR as high as 20:1. There cannot be a specific average stripping ratio of open pit mines

What Is a Stripping Ratio? (with picture)

The stripping ratio method of calculating the profitability of the mining procedure is commonly used in the ore or coal mining process. In relation to its application in the mining of ore, the utility of the stripping ratio is the determination of the approximate ratio of waste material that must be moved in order to reach a certain ratio of ore.

Coal Ratio - an overview ScienceDirect Topics

Contour surface mining takes advantage of the low strip ratio coal reserves adjacent to the outcrop. Contour mining equipment includes a drill, loader, bulldozers, and trucks. The steps in contour mining begin with drilling and blasting a triangle shaped portion of overburden (in cross section) above the coal

(PPT) Calculating Stripping Ratios for Area Strip Mines ...

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 SME’s “Surface Mining” were specifically referenced fStripping Ratio as a ...

(PDF) Stripping Ratios, Pit Limits Cutoff Grade ...

Optimum cut-off grade policy for open pit mining operations through net present value algorithm considering metal price and cost escalation By Raul Cezar Maximizing the net present value by applying an optimal cut-off grade for long-term planning of the copper open pits

Stripping Ratios: What are They and Why are They Important ...

Oct 30, 2018 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

Stripping ratio - Wikipedia

In surface mining, stripping ratio or strip ratio refers to the amount of waste (or overburden) that must be removed to release a given ore quantity. It is a number or ratio that express how much waste is mined per unit of ore. The units of a stripping ratio can vary between mine types. For example, in coal mining the stripping ratio is commonly referred to as volume/weight.

(PPT) Calculating Stripping Ratios for Area Strip Mines ...

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 SME’s “Surface Mining” were specifically referenced fStripping Ratio as a ...

What Is a Stripping Ratio? (with picture)

The stripping ratio method of calculating the profitability of the mining procedure is commonly used in the ore or coal mining process. In relation to its application in the mining of ore, the utility of the stripping ratio is the determination of the approximate ratio of waste material that must be moved in order to reach a certain ratio of ore.

Break Even Stripping Ratio Example For Coal Mining

In coal mining what is a good strip ratio - The ... The break-even stripping ratio is a function of ... of the coal/ore making up the deposit. for example, ... Read more. coal mining stripping ratio - Gold Mining Equipment,Gold ... coal mines to guide mining project evaluation to find the ATC in open pit coal mines. High stripping ratio, ...

What is stripping ratio in mining? - Quora

Answer: 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

In coal mining what is a good strip ratio? - Answers

Jul 29, 2010 Jul 29, 2010 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-

Coal Ratio - an overview ScienceDirect Topics

Contour surface mining takes advantage of the low strip ratio coal reserves adjacent to the outcrop. Contour mining equipment includes a drill, loader, bulldozers, and trucks. The steps in contour mining begin with drilling and blasting a triangle shaped portion of overburden (in cross section) above the coal

Whats the average stripping ratio of open pit mines around ...

Aug 31, 2016 Hardrock would be in the region of 12t:1t but when Platinum was booming we say SR as high as 20:1. There cannot be a specific average stripping ratio of open pit mines

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?? *

strip ratio in coal mining - Mine Equipments

The overall strip ratio for the deposit is 3.7:1 bcm/ROMt. ANGLO AMERICAN METALLURGICAL COAL 14 Jun 2012 ... Indicated or Measured Coal Resource as a result of continued ..... new metallurgical coal mines in the Bowen Basin .... Mining strip ratio 9:1. Mining 101 - West ia Coal Association Coal mining in the United States is also heavily ...

Break-even stripping ratio Britannica

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.

Modeling study on the influence of the strip filling ...

sources. In some coal mines, this ratio has reached 100%.5-8 The preliminary coal mining method, in which villages are moved, is often used for mining, and the coal recovery rate can be guaranteed. However, the cost of moving villages is too high, villages occupy a large amount of land, and new residence choices are limited. Therefore, this ...

what is stripping ratio coal mining - mayukhportfolio.co

SURFACE MINING METHODS. 2-3. 2.2 Strip Mining. Strip mining is ideally applied where the surface of the ground and the ... Typical examples of this type of mining are the larger tonnage coal mining ..... 5.2 Discuss the concept of stripping ratio and how haul road gradient...

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?? *

In coal mining what is a good strip ratio? - Answers

Jul 29, 2010 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.

Break Even Stripping Ratio Example For Coal Mining

In coal mining what is a good strip ratio - The ... The break-even stripping ratio is a function of ... of the coal/ore making up the deposit. for example, ... Read more. coal mining stripping ratio - Gold Mining Equipment,Gold ... coal mines to guide mining project evaluation to find the ATC in open pit coal mines. High stripping ratio, ...

Stripping Ratio Calculation In Mining

Stripping ratio is defined as the tonnage of waste rock to be mined divided by the tonnage of ore to be mined from the pit Stripping ratio is influenced by the shape of the orebody and may vary considerably during the life of the mine Except in rare cases it increases with depth of the orebody below surface The unit cost of mining may ...

Strip Mining - an overview ScienceDirect Topics

Andrew P. Schissler, in Encyclopedia of Energy, 2004 2.3 Strip Mining. Strip mining is employed in coal reserves where the overburden is removed in rectangular blocks in plan view called pits or strips. The pits are parallel and adjacent to each other. Strip mining is fundamentally different from contour or area mining on how the overburden is displaced, called spoil handling.

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.

Strip Mining: A Destructive Way of Coal Extraction ...

Mar 12, 2017 Problems with ecosystem recovery after strip mining. Some other data is equally concerning when it comes to how much companies invest in regenerating the land that has been destroyed by mining. In China, coal mining degraded the quality of 3.2 million hectares of land, but total mine wasteland was restored at a rate of only 10%.

pwc 2012 Americas School of Mines

Notes: Strip Ratio Mining Methods 27 Mistakes are often made when computing the strip ratio. It’s all in the words and you have to watch the flow of material and how it is classified. For example, according to Freeport McMoran’s 2007 10K filing, the concentrator is capable of processing 75,000 metric tons per day of primary sulfide ore and

Surface Coal Mining Methods in Australia

Surface Coal Mining Methods in Australia 5 2. 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

Annex – Coal 2020 – Analysis - IEA

A technique used to remove coal from a natural deposit. Coal deposits in the Earth’s crust occur at various depths and seam configurations, which determine the mining method used. Generally, deep deposits are mined underground and shallow deposits are opencast mines. The strip ratio largely determines whether an opencast mine is profitable or ...

what is stripping ratio coal mining crusher

Empowered coal-miner has macro ambition. At present, the Micro project is mining the coal seam, crushing it down to -30 mm and trucking it to Arnot power station.The mine has a stripping ratio of about 3,5:1. However, this will increase over time.

Modeling study on the influence of the strip filling ...

sources. In some coal mines, this ratio has reached 100%.5-8 The preliminary coal mining method, in which villages are moved, is often used for mining, and the coal recovery rate can be guaranteed. However, the cost of moving villages is too high, villages occupy a large amount of land, and new residence choices are limited. Therefore, this ...

coal mining stripping ratio - hotelikpodkowa

Stripping ratio mining Britannica. 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 . Inquire Now; Topic 5: Mining Methods-Part I-Surface mining . Terrace mining. 1.3. Strip (flat terrain) mining

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