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strip ratio in coal mining

    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

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

    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 overburden, that must be moved in ...

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    How 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

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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. 4.127), 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 ...

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    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 of ore.

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    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 to be mined.

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    Stripping 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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    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

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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. 4.127), 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 ...

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    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 of ore.

    More

    Stripping 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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    Lecture 4 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 SMEs Surface Mining were specifically referenced

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    Strip 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 truck.

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    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

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    Mining - Surface mining Britannica

    Mining - Mining - Surface mining: It has been estimated that more than two-thirds of the world’s yearly mineral production is extracted by surface mining. There are several types of surface mining, but the three most common are open-pit mining, strip mining, and quarrying. These differ from one another in the mine geometries created, the techniques used, and the minerals

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    Appalachia’s Strip-Mined Mountains Face a Growing Climate ...

    Nov 21, 2019  What Studies Warn About Strip Mining and Flood Risk. Across Appalachian coal country, mining companies, flood victims, environmental advocates and academic researchers have debated the extent to ...

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    Powder River Basin - Wikipedia

    The mines work in areas where the stripping ratio is between 1:1 (i.e. one ton of rock for one ton of coal) and 3:1. As the mines expand the stripping ratio will increase. As more rock must be moved (using large electrically powered draglines and diesel and electric mining trucks) the production cost will also increase.

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    Revuboè Coal Mine, Tete - Mining Technology Mining News ...

    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 per annum (mtpa).

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    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%.

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    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

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    Coal mining - Wikipedia

    When coal seams are near the surface, it may be economical to extract the coal using open cut (also referred to as open cast, open pit, mountaintop removal or strip) mining methods. Opencast coal mining recovers a greater proportion of the coal deposit than underground methods, as more of the coal seams in the strata may be exploited. This equipment can

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    Economic Surface Mining of Multiple Seams

    ratios, equipmcnt capabilities, sequencing and selective mining practices .. This paper is concerned primarily with multiple-seam mining of bituminous collI, but it should be realized that the principles can apply to any other mineral that can be mined by multiple-seam surface mining methods. TIle nomenclature used refers to coal mining.

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    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 3:1.

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

    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 ...

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    Lecture 4 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 SMEs Surface Mining were specifically referenced

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    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.

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    Strip 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 truck.

    More

    Coal - MICROMINE - Intuitive Mining Solutions

    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 Attributes

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    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

    More

    Appalachia’s Strip-Mined Mountains Face a Growing Climate ...

    Nov 21, 2019  What Studies Warn About Strip Mining and Flood Risk. Across Appalachian coal country, mining companies, flood victims, environmental advocates and academic researchers have debated the extent to ...

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    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 rock.

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    “Giant Shovel on I-70”Ohio Strip Mine Fight: 1973 The ...

    May 31, 2017  Generally it is economic to strip mine when there is a 20:1 ratio of overburden-to-coal seam, meaning, for example that a three-foot coal seam can be surface mined economically when the overburden is up to 60 feet. However, at some surface mines in Ohio, highwalls of up to 200 feet high remain where five-foot-coal seams have been extracted.

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    Surface collapse control under thick unconsolidated layers ...

    Jan 01, 2019  The width of the mined strip is close to the width of the unmined strip. The recovery ratio of coal mine varies from 40% to 60%. On the other hand, with the use of the backfilling strip mining technique, the recovery ratio increases to 70–75% via reduction of the width of the unmined strip. 4.2. Procedure for backfilling strip mining

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    Glossary of Coal Mining Terms - DOL

    Anthracite - coal with a volatile ratio equal to 0.12 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 virgin ore or coal to the previously mined area. Cave - a collapse of the mine workings.

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    Powder River Basin - Wikipedia

    The mines work in areas where the stripping ratio is between 1:1 (i.e. one ton of rock for one ton of coal) and 3:1. As the mines expand the stripping ratio will increase. As more rock must be moved (using large electrically powered draglines and diesel and electric mining trucks) the production cost will also increase.

    More

    Any coal mining on eastern slopes will affect the Hat ...

    Feb 10, 2021  The Alberta government created a coal policy in 1976, which restricted open pit coal mining in the Rockies. Land was put into four

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