## strip ratio in coal mining

Lecture 4 Calculating Stripping Ratios for Area Strip Mines, Calculating Stripping Ratios for Area Strip Min 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 SMEs Surface Mining ,Phase Planning for Open Pit Coal Mines through Nested Pit ,, This paper presents a phase planning method specially designed for coal deposits with nearly horizontal, bedded coal seams The geology of this type of deposit is modeled into a column model, instead of a block model, to avoid coal-rock mixing in blocks A nested pit generation algorithm is developed for producing a series of nested, least-strip ratio pits with a column model as its inputRevuboé Coal Mine, Tete, The initial operations will be performed at Chipanga seam with the aim to achieve higher coal recovery with a lower strip ratio The coal handling and processing plant at the mine will have a processing capacity of 24,000t per hour It is estimated to process approximately 17 million tonnes of coal ,Coal Types, Formation and Methods of Mining, Surface Coal Mining Surface mining is accomplished by removing overburden from the coal seam and then blasting and removing the coal The ratio of overburden excavated to the amount of coal removed is called the overburden ratio The lower the ratio, the more productive the mine The lowest overburden ratios are found in western surface minStripping Ratio | Mineral Production Activities ,, 6 Stripping ratio The main factor in designing a n open pit mine, which largely determines the cost of mining, is the stripping ratio Stripping is the removal of waste rock from above and around the orebody 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.

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Coal, Strip Ratios: Calculate (cumulative) volume or tonnage strip ratio for every coal block Strip ratio can be reported or contoured Convert Seam Block Model to Wireframe: Output surfaces (roof and/or floor) and solids (seams) Conveniently display a smoothed representation of the Seam Block Model Model Coal Quality AttributesSurface mining, Surface mining, including strip mining, open-pit mining and mountaintop removal mining, is a broad category of mining in which soil and rock overlying the mineral deposit (the overburden) are removed, in contrast to underground mining, in which the overlying rock is left in place, and the mineral is removed through shafts or tunnelsStripping 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,what is stripping ratio coal mining crusher, Surface mining methods835 Кб Typical examples of this type of mining are the larger tonnage coal mining operations inmine using an in-pit crusher and conveyor and waste is tipped directly as envisaged in a terrace mining operation)processing plant on surface, at a rate of 1,22mt per month (ore) at a stripping ratio of 3:14 Coal Mining and Processing | Coal: Research and ,, 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 recoverableThis is not a fixed quantity, but depends on the geological resource, the market price, and the cost of mining The particular characteristics of the coal mining industry create unique ,.

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CHAPTER 11 Mining Technology, States, the recovery ratio is63 percent Sur- face mines, on the other hand, typically re-cover from70 to 90 percent of the minable resource , 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 ofIn coal mining what is a good strip ratio?, In coal mining what is a good strip ratio? Asked by Wiki User See Answer Top Answer Wiki User Answered 2010-07-29 10:13:07 1 Overburden O/B 2 Coal / ore 3 Interburden (or parting), I/B 4 ,Glossary of Coal Mining Terms, Anthracite - coal with a volatile ratio equal to 012 or less Anticlinal axis - the ridge of an anticline Anticline - an- upward sold or arch of rock strata , Cast - a directed throw; in strip-mining, the overburden is cast from the ore or coal to the previously mined area Cave - a collapse of the mine ,COAL PILLAR STRENGTH AND PRACTICAL COAL PILLAR ,, range of pillar w/h ratios, as well as the effects of seam strength, rock partings, and weak floor The interdependence among pillar design, entry stability, and ventilation efficiency in longwall mining is briefly discussed Finally, the site-specific nature of coal pillar design is emphasized, and a direction of future research is suggestedStrip Ratio In Coal Mining, Auger mining can be used for coal outcrops on a hillside or in strip mines where the stripping ratio has become too high to be economical for strip mining (Schobert, 1987) In auger mining, an auger drills it way into the face of the coal seam, and the coal is removed via conveyor and loaded directly onto a ,.

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(PDF) Stripping Ratios, Pit Limits & Cutoff Grade ,, In strip coal mining operations, the following are sometimes seen: The original pit on this section (Fig 4127), consists of 6 benches and has a depth of 150 ft The area of ore A o Surface costs are dependent on stripping ratios UG = Underground cost of mining per ton of ore OP = Open pit cost of mining per ton of ore SC = open pit stripping ,COAL MINING MIDTERMS Flashcards | Quizlet, The mining proceeds around the hills and mountains, extracting the coal seam to a depth fixed by the economic strip ratio CONTOUR MINING METHOD - Removing overburden from the coalbed with the first cut at or near the outcrop, and proceeding around the hillsideWhat Is a Stripping Ratio? (with picture), How to calculate stripping ratio? - ResearchGateHow to calculate stripping ratio?, For instance: If the thickness waste rock (overburden) is 100m and the thickness of coal is 50m then stripping ratio would be 2:1 That means one m3 (cubic meter) of coal would need mining two m3 ,Coal Mining: How Is Coal Mined?, Jan 07, 2021· Surface Mining Strip mining and mountaintop removal are two popular surface mining strategies when coal seams are located close to the surface of the earth Strip Mining In strip mining, the first step is to strip off the vegetation and soil in the vicinity of the surface to be mined for coal.

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Stripping ratio, 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 ,What Is a Stripping Ratio? (with picture), Jan 12, 2021· 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 ,Surface mining planning and design of open pit mining, Jan 09, 2016· vii) Stripping Ratio The ratio is most commonly expressed as: Strip Ratio (SR) is the mass of waste to be mined to obtain one unit mass of ore Waste (tons) SR = ----- Ore (tons) For example, a 3:1 stripping ratio means that mining one cubic meter of ore will require mining three cubic meters of waste rockStrip Mining for Coal, Sep 11, 2015· 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 ,University of Wollongong Research Online, A major operation in the recovery of any coal seam by surface mining methods is the removal of the overburden (Fidler, 1979) Of the available surface mining methods, strip mining is arguably the most common method used to mine coal in Australia Pre-strip by definition is the removal of any waste material not considered to be valuable.

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Coal Ratio, 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 ,Chapter 2: The Environmental 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 the surfaceWhat Is a Stripping Ratio? (with picture), Jan 12, 2021· 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 oreStrip Mining for Coal, 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 ,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 32 million hectares of land, but total mine wasteland was restored at a rate of only 10%.