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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Get PriceUnderground mining sometimes called deep mining is necessary when the coal is several hundred feet below the surface Some underground mines are thousands of feet deep with tunnels that may extend out from the vertical mine shafts for miles Miners ride elevators down deep mine shafts and travel on small trains in long tunnels to get to the coal
Get Pricethinner black coal seams suit the underground mining methods There are a number of different types of access modes for underground mining These include drift incline/ decline and shaft and can be used in conjunction with either of the three modes for underground mining within Australia Drift is generally used when the coal deposit is
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Get PriceThere are six principal methods of underground mining Longwall mining Longwall mining accounts for about 50 percent of underground production The longwall shearer has a face of 1000 ft or more It is a sophisticated machine with a rotating drum that moves mechanically back and forth across a wide coal seam
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Get PriceA new low profile diesel generator could be a game changer for room and pillar sections in West Virginia by steve fiscor editor in chief Moving underground coal mining equipment from one section to another can be time consuming and costly Traditionally moving a large electrically powered piece of equipment such as a continuous miner feeder breaker or a roofbolter required the […]
Get PriceLongwall mining is a highly mechaniz ed underground mining sys tem for mining coal It set of longwall mining equipment consists of a coal shear er mounted on convey or operating
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