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Publication of BE670192ApublicationCriticalpatent/BE670192A/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
E21F13/08—Shifting conveyors or other transport devices from one location at the working face to another
E21F13/086—Armoured conveyors shifting devices
E—FIXED CONSTRUCTIONS
E21—EARTH OR ROCK DRILLING; MINING
E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
E21D11/40—Devices or apparatus specially adapted for handling or placing units of linings or supporting units for tunnels or galleries