Four-post supporting secured low-roof coal bracket

The utility model discloses a four-column supporting and shielding type low order roof caving coal supporting frame, which comprises four supporting hydraulic telescopic vertical columns arranged on a base seat. The top ends of the four supporting hydraulic telescopic vertical columns are respective...

Ausführliche Beschreibung

Bibliographische Detailangaben

Hauptverfasser:	GAO YOUJIN, LIU GUOLIANG, WANG XIAOZHUO, ZHUANG JIANPING, CAO BIDE, YU DERUN, ZHANG YAODONG, SHI CHUNLI
Format:	Patent
Sprache:	chi ; eng
Schlagworte:	EARTH DRILLING FIXED CONSTRUCTIONS GALLERIES LARGE UNDERGROUND CHAMBERS MINING SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, ORDRAINING IN OR OF MINES OR TUNNELS SHAFTS TUNNELS
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