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    CHAPTER 11 Mining Technology The Federal Coal Leasing Amendments Act of 1976 charged OTA to assess the feasibility of the use of deepmining technology on leased areas. With the passage of the Surface Mining Control and Reclamation Act of 1977 congressional interest in the study of deep underground mining technology shifted

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  • COAL MINING TECHNOLOGY elibrary WCL

    •Coal deposits are mined by cutting a network of 'roads' into the coal seam & leaving behind 'pillars' of coal to support the roof of the mine. •These pillars can be up to 40% of the total coal in the seam – although this coal can sometimes be recovered at a later stage by 'retreat mining'.The roof is then allowed to collapse and the mine is

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  • DRAGLINE MINING RETURNS TO WESTERN KENTUCKY

    The article reports on Armstrong Coal Co. which is refurbishing and deploying the draglines mining machines in western Kentucky coal mines. As reported, the newly created entity infused with capital from east coast financiers and piloted in many respects by long time Peabody Energy veteran Kenny Allen is putting these draglines into action once again.

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    funds into coal mining. • Mainly for these reason, Coal mining was nationalised between 1971 & 1973. • Coal India was formed as PSU in Nov 1975. • During 197591 massive investment by Govt. helped to achieve a growth rate of 5.3% • 'Coal at any cost' continued to dominate the

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    This has led to major changes in overburden/ interburden excavation technology in surface coal mines from shovel mining to that of draglines. Coal India Limited (CIL) has now standardized the draglines in two sizes, which are 10/70 and 24/96 for their mines. Most of the mines depend 24 hours a day, 7 days a week on the dragline working.

    Authors: Ankit KumarAbout: Openpit mining
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