EXCAVATION DEVICE

PURPOSE:To eliminate requirement for chipping work of a vertical shaft by providing a vertical shaft shield machine preliminarily with a cutter and a partition wall of a horizontal tunnel shield machine, removing a part of vertical shaft after having excavated a vertical shaft and assembling the hor...

Ausführliche Beschreibung

Bibliographische Detailangaben

Hauptverfasser:	BESSHO TOSHIHIKO, KANEKO MICHIKAZU, ISA HIDE
Format:	Patent
Sprache:	eng
Schlagworte:	EARTH DRILLING FIXED CONSTRUCTIONS GALLERIES LARGE UNDERGROUND CHAMBERS MINING SHAFTS TUNNELS
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