CONSTRUCTION OF SHAFT

PURPOSE:To make shaft sinking executable so safely by solving problems on the shortening of a construction period necessary for a high depth shaft, the promotion of cost down, the countermeasure of high hydraulic pressure and so on. CONSTITUTION:A slot 18 is formed in the ground by a reverse circula...

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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