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Priority to NL6514961ApriorityCriticalpatent/NL6514961A/xx
Publication of NL6514961ApublicationCriticalpatent/NL6514961A/xx
E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
E21F13/00—Transport specially adapted to underground conditions
E21F13/10—Anchorings for conveyors
E—FIXED CONSTRUCTIONS
E21—EARTH OR ROCK DRILLING; MINING
E21C—MINING OR QUARRYING
E21C29/00—Propulsion of machines for slitting or completely freeing the mineral from the seam
E21C29/04—Propulsion of machines for slitting or completely freeing the mineral from the seam by cable or chains
E21C29/06—Propulsion of machines for slitting or completely freeing the mineral from the seam by cable or chains anchored at one or both ends to the mine working face