Special chock for galleries

The utility model relates to a special bracket for a tunnel, which comprises a top beam, wherein, the two ends of the top beam are hinged with side wall protecting plates through draw rods which are hinged; support rods are hinged under the two sides of the top beam, and a support cylinder is inclin...

Ausführliche Beschreibung

Bibliographische Detailangaben

Hauptverfasser:	HOU CHAOJIONG, ZHANG YIDONG, HOU YOUFU
Format:	Patent
Sprache:	eng
Schlagworte:	EARTH DRILLING FIXED CONSTRUCTIONS GALLERIES LARGE UNDERGROUND CHAMBERS MINING SHAFTS TUNNELS
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