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### Stripping Ratios: What are They and Why are They Important?

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 ...

### strip ratio in coal mining - Mine Equipments

We needed a combination of very good quality coal, very good infrastructure, low strip ratio... It sits in a historic mining region, mined for more than 00 years and currently ... Australian Mine Sites (A-Z) - Coal - Saraji Each strip is excavated perpendicular to the dip of the coal to maintain a consistent waste/ coal stripping ratio .

### In coal mining what is a good strip ratio - answers

* Consider Capital Quarries , Rolla, at 25 m depth, SR = 0.5 b. To surface mine we need to remove some waste in addition to ore / coal c. SR measures how much waste needs to be removed so that a ...

### strip ratio in coal mining

The Coal Area Strip Mine Formula • Strip Ratio = OB Thickness (in ft) * . / 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 00% coal recovery .

### 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: 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 - Inbum.Net

b. To surface area mine we have to remove some waste materials furthermore to ore / coal c. SR measures just how much waste must be removed to ensure that a device of ore/coal could be mined * This implies “relative depth” source : coal-mining-details.co.cc See also: In coal mining exactly what is a good strip ratio External links: Youtube ...

### Lecture 4 Calculating Stripping Ratios for Area Strip Mines

The Coal Area Strip Mine Formula • Strip Ratio = OB Thickness (in ft) * . / 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 00% coal recovery .

### Surface Strip Coal Mining Handbook - sacea.org.za

This handbook on surface strip coal mining serves as a general introduction to the subject of mining, specifically surface strip coal mining. It is intended as handbook for engineers who are new to the field of mining engineering, or for students who are entering the field with little prior knowledge.

### coal mining stripping ratio - emaxlist

In coal mining what is a good strip ratio - Wiki Answers SR measures how much waste needs to be removed so that a unit of ore/coal can be mined * This means "relative depth" source : coal-mining-info.co.cc. Get a Price. stripping ratio coal mining comp qatar - helivate.co.za.

### Effect Of Stripping Ratio In Coal Mining

effect of stripping ratio in coal mining. Iron ore - Wikipedia. Lower-grade sources of iron ore generally require beneficiation, using techniques like crushing, milling, gravity or heavy media separation, screening, and silica froth flotation to improve the concentration of the ore and remove impurities.

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

CHAPTER 8 Stripping Ratios, Pit Limits & Cutoff Grade Optimization Dr. Teuku Andika R Putra USM 20 4 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.

### Stripping Ratio Considerations | Mining | Reference Range

The parameter known as the stripping ratio is almost universally used and represents the amount of uneconomic material that must be removed to uncover one unit of ore. Fig. 3. . .4 represents an idealized open pit ore body, dipping at angle a. . 3.4. Overall stripping ratio representation .Stripping Ratio Considerations y Fig. ..

### Rational economic stripping ratios - Taylor & Francis

ratios to consider two time periods, the period till stripping and the period till extraction. The period till stripping is defined here as the time when a decision is made to strip a mining block to when the block gets stripped. The period till extraction of a block is defined here as the time from when a decision is made to strip a mining ...

### What is the maximum stripping ratio of open pit Diamond ...

The stripping ratio is chosen based on economics. A high grade orebody can support a high stripping ratio. A low grade ore body cannot support a high stripping ratio.

### chidliak: Strip Ratio

Strip itself is easily understood in coal mining where you may have 20 metres of overburden before you expose a 2 metre coal seam. In this case, it is a simple to just divide the length of the overburden by the length of the coal seam (20/2 = 0: strip ratio) That is coal mining or strip mining at its core.

### Strip Mining for Coal - YouTube

Sep , 20 5 · Almost 20 years since the strip mine began and it is still going strong here in Stellarton, Nova Scotia. In another five or six years time the mining should be complete and will mark the end of ...

### What Is a Stripping Ratio? (with picture) - wisegeek

Nov 05, 20 8 · 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 appli ion 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.

To surface mine we need to remove some waste in addition to ore / coal c. SR measures how much waste needs to be removed so that a unit of ore/coal can be mined * This means "relative depth ...

### Coal mining - Wikipedia

Coal mining is the process of extracting coal from the ground. Coal is valued for its energy content, and, since the 880s, has been widely used to generate electricity. Steel and cement industries use coal as a fuel for extraction of iron from iron ore and for cement production. In the United Kingdom and South Africa, a coal mine and its structures are a colliery, a coal mine a pit, and the ...

### Cline Mining Corporation • Projects • Mining Terms

Strip Ratio The stripping ratio is the most influential economic factor in the evaluation and planning of open-pit coal mines. It represents the volume of rock both above and within (partings) coal seams expressed in Bank Cubic Metres (BCMs) which must be mined to obtain tonne of or clean coal.

### Mining 0 | West ia Coal Association

The typical method of assessing surface mining economics for a coal seam is a calculation of overburden (native rock and soil above a coal seam) moved per clean ton of coal produced, commonly referred to as “mining ratio”. The higher the mining ratio (or more overburden moved per clean coal ton), the higher the cost of producing coal.

### Glossary of Mining Terms - rocksandminerals

Glossary of Mining Terminology. A. ... roof bolts and beams used to support the rock overlying a coal seam in an underground mine. A good roof support plan is part of mine safety and coal extraction. ... Stripping ratio — The unit amount of overburden that must be removed to gain access to a similar unit amount of coal or mineral material.

### What Is a Stripping Ratio? (with picture) - wisegeek

Nov 05, 20 8 · 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 appli ion 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.

### what is a good size coal mine - shivamproperty.co

in coal mining what is a good strip ratio ... Good Quality Coal Mine Oil Gas Industrial Working Clothing of... Quality work clothes protective clothing manufacturer, buy high quality Good Quality Coal Mine Oil Gas Industrial Working Clothing of XI'AN DUAN CO., LTD... Learn More.

### 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 cost of producing and…

### Negative Effects of Coal Mining - The World Counts

The effects of mining coal on the environment. There are 2 ways to mine coal – Strip Mining and Underground Mining – both ways have their own impact to the environment and health. We know it but coal is such a cheap energy source that we don’t want to let go of it. The negative effects of coal mining cannot be disputed:

### Coal (fuel source) Questions including "What is found on ...

Coal is mined by two methods: surface or 'opencast' mining or underground or 'deep' mining. The choice of mining method largely depends on the geology of thecoal deposit.

### Ovoot Coking Coal Project - Aspire Mining Limited

Ovoot Coking Coal Project Aspire’s wholly owned Ovoot Project comprises one mining license and two contiguous exploration licences which span across over 30 square kilometres. The Ovoot Project area is lo ed in north-western Mongolia and is a new discovery made by the company in 20 0 to 20 3.

### Glossary of Mining Terms - Coal Edu ion

A. Abutment - In coal mining, ( ) 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 the rocks over a longwall face is transferred to the front abutment, that is, the solid coal ahead of the face and the back abutment, that is, the settled packs behind the face.

### CHAPTER Mining Technology - Princeton University

are being used successfully at several strip mines in the West such as the Rosebud Mine in the Montana portion of the Powder River 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 00 to 200 ...

### Coal Mine Reclamation - Ground Truth Trekking

Usibelli Coal Mine Inc. is the only operating coal mine in Alaska and has pledged around \$3 million for reclamation of the Gold Run Pass and Poker Flats mines near Healy. Coal mine reclamation is in progress for some older mines, including the Jonesville mine, Suntrana Mine, and some

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

EFFECTS OF. STRIP MINING ... 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 ...

### Glossary of Mining Terms - rocksandminerals

Glossary of Mining Terminology. A. ... roof bolts and beams used to support the rock overlying a coal seam in an underground mine. A good roof support plan is part of mine safety and coal extraction. ... Stripping ratio — The unit amount of overburden that must be removed to gain access to a similar unit amount of coal or mineral material.

### West ia Mountaintop Coal Removal Photos - Business ...

Traditional coal mining involves tunneling deep underground. This method is expensive, people-intensive, and occasionally dangerous. It has been on the decline since the 970s.

### Coal Mine Dust Exposures and Associated Health Outcomes

This Current Intelligence Bulletin (CIB) updates the information on coal mine dust exposures and associated health effects from 995 to the present. A principal intent is to determine whether the 995 recommendations remain valid in the light of the new findings, and whether they need to be updated or supplemented. The report

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