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Tools And Machinery Used In Coal Mining

machines used in coal mining career trend,nov 28, 2018 longwall mining is more efficient than room and pillar mining, but the equipment is more expensive. surface mining for extracting coal which lies close the surface, huge drag-line shovel machines remove the topmost layers of soil and rock, exposing the coal, which is then removed by smaller machines..pdf equipmentmachinery failure rate in hard coal mines,in the hard coal mining process, monitoring of mining equipment machines and analysis of failure rates in the equipment and machines invo lved in the process are of great importance..

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