Controllable segmented pressure relief device and pressure relief method in freezing method construction

The invention discloses a controllable segmented pressure relief device in freezing method construction. The controllable segmented pressure relief device comprises a combined pressure relief pipe, a drill bit and an operation wrench. Each combined pressure relief pipe comprises a pressure relief fl...

Ausführliche Beschreibung

Bibliographische Detailangaben

Hauptverfasser:	WANG LEI, DONG SHIZHUO, XU SHURONG, SUN JIA, LIU MINGLIANG, CUI BINGBING, DING HANG, KONG LINGHUI
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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