Tunnel pre-supporting structure

The utility model relates to a tunnel pre-supporting structure, and provides a novel coupling forepoling bar pre-supporting structure so as to adapt to empty roof pre-supporting before permanent supporting of a tunnel blasting excavation working face. By adjusting the size of the hole opening of the...

Ausführliche Beschreibung

Bibliographische Detailangaben

Hauptverfasser:	WANG QINLEI, WANG DI, GAO CHONGKUN, ZHANG XIN
Format:	Patent
Sprache:	chi ; eng
Schlagworte:	EARTH DRILLING FIXED CONSTRUCTIONS GALLERIES LARGE UNDERGROUND CHAMBERS MINING SHAFTS TUNNELS
Online-Zugang:	Volltext bestellen
Tags:	Tag hinzufügen Keine Tags, Fügen Sie den ersten Tag hinzu!