influence of striping ratio on open cast coal mining

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  • Open Pit Mining Techniques|Surface Mines|Rock .

    Open-pit mines are characteristically engorged until either the mineral resource is exhausted, or a mounting ratio of overburden to ore makes more mining uneconomic. When this occurs, the exhausted mines are at times converted to landfills for disposal of solid wastes.

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  • 14.3 Open Cast (Strip) Mining - 1of 2

    Area mining is often referred to as open cast or strip (furrow) mining. It is frequently practiced on a large scale, which results in low unit cost, high productivity, high recovery, and greater safety compared to underground min-ing. Contour (or collar) mining progresses in a narrow zone following the outcrop of a coal seam in mountainous terrain.

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  • PROVISIONAL COAL STATISTICS

    11. Overall stripping ratio for the year 2014-15 was 2.33 (Stripping ratio is defined as the ratio of Over Burden Removal to Coal produced in Open Cast mining.) OBR means the quantity of over burden removed during the process of open cast mining. [Table :- 2.19] (B) Despatch 1.

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  • Environment Impact Assessment of Coal Mining

    Sub-bituminous coal, Bituminous coal and Anthracite. Open cast mining and underground mining (room pillar, long wall, drift, shaft, slope mining) are some types of coal mining. Proper Environment impact assessment of coal mining is very important and here we take some issues which should be considered and some

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  • Open-Pit Mining Methods

    Open-pit mining methods are applicable to mining ore deposits that apex at or near the surface. If the deposit apexes below the surface, the overburden and barren capping overlying the ore must be removed in advance of open-pit mining. The removal of this material is known as stripping. The stripping-pit limits must be extended beyond the limits of the ore pit to provide a bench, and the pit ...

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  • What Is Open-Pit Mining? (with picture)

    09-08-2020· Open-pit mining may be done to extract coal from the earth. ... The stripping ratio in open-pit mining is important because the profitability of that particular mining venture hinges on the ability of the company to gain more from the extraction process than what it expends in order to obtain access to the material.

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  • PROVISIONAL COAL STATISTICS - Coal Controller

    Stripping Ratio is defined as the ratio of OBR to coal produced in open cast mining. OBR means the quantity of over burden removed during the process of open cast mining. [Table :- 2.19] (B) Despatch 1. In the year 2015-16, despatch of indigenous raw coal was 632.169 MT against 603.772 MT during 2014-15,

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  • une, 2018 Future of Bulk Production from Underground Coal ...

    Earlier stripping ratio of 3:1 was considered optimum beyond that it was not economic But now due to the deployment of huge size HEMMs, even a ratio of 8:1 is considered to be viable l Easier mining method by open cast l Less impact of geo-mining adversities l .

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  • Open-pit mining - Wikipedia

    Open-pit mining, also known as open-cast or open cut mining, is a surface mining technique of extracting rock or minerals from the earth by their removal from an open-air pit, sometimes known as a borrow.. This form of mining differs from extractive methods that require tunnelling into the earth, such as long wall mining.Open-pit mines are used when deposits of commercially useful ore or rocks ...

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  • (PDF) COST ESTIMATION FOR OPEN PIT MINES: .

    This article presents cost models for open pit mines, which takes into account cost uncertainty. In this paper, cost uncertainty is considered as cost of under production, and cost of over production.

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  • 'We've suffered enough': Durham locals fight new .

    23-07-2018· The Bradley open-cast coal mining site in the Pont valley, with top soil and sub soil removed to prepare for further extraction. Public footpaths into the valley have been lost.

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  • Strip Mining - an overview | ScienceDirect Topics

    Coal is primarily obtained by surface mining (sometimes called " strip mining," but not by the industry) and underground mining. There are two main sources of power plant coal in the United States: (1) Pennsylvanian-age coals in eastern basins like the Appalachian, Illinois, and Black Warrior, and (2) Paleocene-age coals in western states such as Wyoming, Colorado, and Montana.

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  • Stripping ratio | mining | Britannica

    07-09-2020· 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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  • 1 4 Stripping Ratio | Surface Mining | Mining | .

    After going through this lecture you will be able to 1. list and define stripping ratios (K, C) 2. calculate various stripping ratios for given situations (C, Ap) 3. explain the influence of stripping ratios on planning decisions (A, S) 4. assess the most economic method of mineability of a deposit by surface mining or underground mining from the limiting stripping ratio (A, S, E)

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  • 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 3:1 stripping ratio means that mining one tonne of ore will require mining three tonnes of waste rock. Stripping ratios are typically reduced to show the volume of waste removal required to extract one unit ...

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  • Mining - latest news, breaking stories and .

    Mining. Australasia. ... Critics say stripping executives of bonuses is 'empty gesture ... Open-cast coal mine 'will blight pristine stretch of north east coast' Home News.

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  • LAND DEGRADATION DUE TO MINING AND ITS REMEDIAL .

    The ratio of overburden excavated to the amount of mineral removed is called the stripping ratio. For example a stripping ratio of 4:1 means that 4 tonnes of waste rock are removed to extract one tonne of ore. Lower the ratio, the more productive the mine. Stripping ratio varies with the area under mining. According to the data generated by

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  • What is stripping ratio in mining? - Quora

    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 wil...

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  • 1 4 Stripping Ratio | Surface Mining | Mining | .

    After going through this lecture you will be able to 1. list and define stripping ratios (K, C) 2. calculate various stripping ratios for given situations (C, Ap) 3. explain the influence of stripping ratios on planning decisions (A, S) 4. assess the most economic method of mineability of a deposit by surface mining or underground mining from the limiting stripping ratio (A, S, E)

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  • Basics of openpit mining - LinkedIn SlideShare

    Stripping ratio depending on quality of the coal ISN 15. Advantages of opencast mining There is no problem of ventilation There is no problem of Roof control, supports There is no problem of lighting in daytime.Percentage of coal extraction is much higher (about90%) than that of Underground mining (30-60%) High OMS Much productivity / profits.

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  • 'We've suffered enough': Durham locals fight new .

    23-07-2018· The Bradley open-cast coal mining site in the Pont valley, with top soil and sub soil removed to prepare for further extraction. Public footpaths into the valley have been lost.

    Learn More
  • What Is Open-Pit Mining? (with picture)

    09-08-2020· Open-pit mining may be done to extract coal from the earth. ... The stripping ratio in open-pit mining is important because the profitability of that particular mining venture hinges on the ability of the company to gain more from the extraction process than what it expends in order to obtain access to the material.

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  • CHAPTER 11 Mining Technology - Princeton University

    the mining technologies currently in use on Federal leases and the potential for commer-cial mining technologies to extract Federal coal reserves from deep underground seams. The chapter discusses: three surface mining techniques that are used in the West: 1) area strip, 2) open pit, and 3) terrace pit; two methods of underground mining in

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  • ESTIMATION OF CAPITAL COSTS FOR ESTABLISHING COAL MINES .

    Open pit mining 8 1.4. Underground coal mining 9 1.4.1. Room and pillar 9 1.4.2. Longwall 12 ... mining (stripping deeper hard overburden) methods and associated ... influence of different mining methods on capital and operating costs,

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