CONSTRUCTION METHOD OF VERTICAL SHAFT

PURPOSE:To solve all problems such as curtailment of construction period necessary for a great depth vertical shaft, reduction of cost, measure for high water pressure, etc., and to make it possible to safely and easily cope even with a vertical shaft having a larger diameter without causing problem...

Ausführliche Beschreibung

Bibliographische Detailangaben

Hauptverfasser:	NUMA KUNIO, YASUMOTO MASATAKE, OKUMURA TOSHIHIRO
Format:	Patent
Sprache:	eng
Schlagworte:	EARTH DRILLING FIXED CONSTRUCTIONS GALLERIES LARGE UNDERGROUND CHAMBERS MINING SHAFTS TUNNELS
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