VERTICAL HOLE EXCAVATION METHOD AND DEVICE THEREOF

PURPOSE:To excavate a vertical hole, specially a vertical hole having a large diameter efficiently and safely, obviate the improvement of the peripheral ground and easily cope with the change of an excavation diameter, etc. CONSTITUTION:A hollow pipe 1 and an excavation vane 2 mounted to the lower p...

Ausführliche Beschreibung

Bibliographische Detailangaben

Hauptverfasser:	SASAKI KIYOMI, MIZUTA SADACHIKA, OKUMOTO KAZUNOBU
Format:	Patent
Sprache:	eng
Schlagworte:	EARTH DRILLING EARTH DRILLING, e.g. DEEP DRILLING FIXED CONSTRUCTIONS GALLERIES LARGE UNDERGROUND CHAMBERS MINING OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR ASLURRY OF MINERALS FROM WELLS SHAFTS TUNNELS
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