Protective device for air door of coal-mining roadway

The utility model relates to a protective device for an air door of a coal-mining roadway, and the air door is arranged in the roadway. An air door bumper comprises a cross beam and two vertical rods, wherein the vertical rods are fixed on the outer side of the air door in the width direction of the...

Ausführliche Beschreibung

Bibliographische Detailangaben

Hauptverfasser:	LIU JUNFENG, SHANG YUNJIE, FAN FENGLIANG, WANG FENGLIN, SHI FENG
Format:	Patent
Sprache:	chi ; eng
Schlagworte:	EARTH DRILLING FIXED CONSTRUCTIONS MINING SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, ORDRAINING IN OR OF MINES OR TUNNELS
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