Retainment wall for underground mine and method of construction

A retainment wall for underground horizontally extending mine shafts wherein a spaced vertical series of horizontal support ribs are secured to one or more upright supports that are secured in the mine shaft between the side walls thereof Porous material covers and is secured to the forward retainin...

Ausführliche Beschreibung

Bibliographische Detailangaben

Hauptverfasser:	BREEDLOVE, John J, PROFFITT, Tyler, LAMOND, Robert, DENVER, Erik
Format:	Patent
Sprache:	eng
Schlagworte:	EARTH DRILLING FIXED CONSTRUCTIONS GALLERIES LARGE UNDERGROUND CHAMBERS MINING SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, ORDRAINING IN OR OF MINES OR TUNNELS SHAFTS TUNNELS
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