open pit coal mining vs underground coal mining

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  • Glossary of coal mining terminology

    Glossary of coal mining terminology , An adit is an underground level or tunnel to the surface for access or drainage purpos , A bell pit was a type of coal mine in which coal found close to the surface was extracted by sinking a shaft and removing coal from around it until the roof became unstable It was then abandoned and left to ....

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  • Underground Mining

    May 08, 2013· Canada and global mining industry This is one of a series of videos I edited for Vale The producer I worked for travelled to many locations around the world Shots were taken in the air, on the ....

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  • Reading: Open

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

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  • Underground mining (soft rock)

    Underground soft rock mining is a group of underground mining techniques used to extract coal, oil shale, potash and other minerals or geological materials from sedimentary ("soft") rocks Because deposits in sedimentary rocks are commonly layered and relatively less hard, the mining methods used differ from those used to mine deposits in igneous or metamorphic rocks (see Underground mining ....

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  • Certifications

    A Shiftboss Certification is required for those supervising more than six people in an active open-pit or underground mine This certification is only available through the Regional Mining Operations offic Fireboss Certification (Underground Coal Mine Manager) Fireboss Certification is required to supervise people in underground coal min...

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  • (PDF) COAL MINING METHODS

    In open-pit mining of the coal seam, , Modern underground coal-mining methods can be c lassified into four distinct , for being the safest surface and underground coal mines in the country ....

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  • The Mining Life: Open Pit vs Underground

    Aug 22, 2017· The differences between the many kinds of mines, especially open pit mines and underground mines, are many, and miners tend to prefer one over the other Every mining site has its natural and man-made characteristics that make it unique...

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  • Coal mining

    Coal mining - Coal mining - Underground mining: In underground coal mining, the working environment is completely enclosed by the geologic medium, which consists of the coal seam and the overlying and underlying strata Access to the coal seam is gained by suitable openings from the surface, and a network of roadways driven in the seam then facilitates the installation of service facilities ....

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  • Surface 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 tunnels...

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  • Is open pit mining safer than underground mining

    Open pit mining may be used when very large quantities of material are mined, such as gold mining, copper ore, etc It permits removal of a much greater amount of material (underground coal mines ....

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  • Open Pit Coal Mine

    Mar 30, 2011· Open Pit Coal Mine Stellarton, NS, Open Pit Coal Mine Stellarton, NS, Skip navigation Sign in , 11 Most Massive Mines in the World - Duration: 10:20 American Eye 313,714 views...

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  • Mine vs Quarry

    Mar 06, 2018· A quarry is the same thing as an open-pit mine from which minerals are extracted The only non-trivial difference between the two is that open-pit mines that produce building materials and dimension stone are commonly referred to as quarri The word quarry can also include the underground quarrying for stone, such as Bath stone...

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  • How Coal Is Mined and Refined

    Feb 08, 2018· Coal mining has had many developments over the recent years, from the early days of men tunnelling, digging and manually extracting the coal on carts, to large open cut and long wall min Mining ....

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  • Coal mining

    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 include the following: Draglines which ....

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  • Open pit mines

    The first iron ore extractions were made here in 1895 Beginning as a small underground mine, the land eventually became one vast open pit as other mines began to develop and emerge The center of the actual pit is located where the original town of Hibbing once stood As the mine grew bigger, the town had to be moved...

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  • Barapukuria underground coal mine and open

    Barapukuria underground coal mine and open-pit coal mining project, Bangladesh Miners and workers of Barapukuria - Source: Miners and workers of Barapukuria Coal Mine Company Ltd and Barapukuria Power Plant bring out a procession in Dinajpur yesterday to protest against the alleged corruption of the officials of the two projects...

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  • Coal mining

    Coal mining - Coal mining - Choosing a mining method: The various methods of mining a coal seam can be classified under two headings, surface mining and underground mining Surface and underground coal mining are broad activities that incorporate numerous variations in equipment and methods, and the choice of which method to use in extracting a coal seam depends on many ,...

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  • Open Pit Mining

    An open pit mine could recover almost 90% of the oil shale in a very thick deposit [17] It is said that strip mining could provide an even higher recovery Shown in Fig 88 is an open-pit mine used to explain the process of mining the oil shale The overburden is drilled and blasted loose over an area above the oil shale zone and the load is ....

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  • Open Pit Mine

    Jul 24, 2004· An open-pit mine at Decazeville, with a coal fire that started by spontaneous combustion Self-heating from exothermic reactions and subsequent coal combustion in open-pit mines is common, although there are many other possible causes of combustion...

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  • How coal is extracted from an open pit mine

    Jun 15, 2017· Follow the journey of coal from the point of extraction to being transported and loaded onto barges ready to set sail to coal importing countri...

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  • Stripping ratio

    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...

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