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methods of dry grinding coal

methods of dry grinding coal

Surface coal mining generally involves the following sequence of unit operations: (1)clearing the land of trees and vegetation,(2)removing and storingthetop layersof theunconsolidated soil (topsoil),(3)drilling the hard strata over the coal seam,(4)fragmenting or blastingthehard strata with explosives,(5)removingtheblasted material, exposingthecoal seam,andcleaningthetopof thecoal seam,(6)fragmentingthecoal seam,as required, bydrilling and blasting,(7)loading

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