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Publication of BE726589ApublicationCriticalpatent/BE726589A/xx
E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
E21D23/00—Mine roof supports for step- by- step movement, e.g. in combination with provisions for shifting of conveyors, mining machines, or guides therefor
E21D23/04—Structural features of the supporting construction, e.g. linking members between adjacent frames or sets of props; Means for counteracting lateral sliding on inclined floor
E21D23/0481—Supports specially adapted for use in combination with the placing of filling-up materials
E—FIXED CONSTRUCTIONS
E21—EARTH OR ROCK DRILLING; MINING
E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
E21F15/00—Methods or devices for placing filling-up materials in underground workings
E21F15/02—Supporting means, e.g. shuttering, for filling-up materials
