LUBRICANT EXTRACTION MECHANISM FOR ROCK-MASS PROTECTION PLATE

PROBLEM TO BE SOLVED: To provide a lubricant extraction mechanism which enables long-distance construction by surely discharging a lubricant from a discharge hole to reduce friction between a protection plate and a rock mass.SOLUTION: A lubricant extraction mechanism for a protection plate 4 which i...

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Bibliographische Detailangaben
Hauptverfasser:	KUNUGI MASAHIRO, ARAKI HAJIME, ISHIBASHI HIDENORI, SHIMAOKA IWAO, TAIRA HIDEO
Format:	Patent
Sprache:	eng
Schlagworte:	EARTH DRILLING FIXED CONSTRUCTIONS GALLERIES LARGE UNDERGROUND CHAMBERS MINING SHAFTS TUNNELS
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