Proposed vertical shaft excavation.

Assembling and inserting retaining wall into the vertical shaft in the

Kazuhide SAWADA, Gifu University, Gifu-shi, Gidai, Department of Civil Engineering

Keller implements ground freezing technique in New York's major tunnel project

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Atsushi Yashima's research works Gifu University, Gifu-shi (Gidai) and other places

Proposed vertical shaft excavation.

Tunnel Shafts: Types, Construction, and Advantages - The Constructor

Uttarakhand Tunnel Collapse: Two New Tunnels And A Vertical Shaft: New Plan To Rescue Trapped Workers

Proposed vertical shaft excavation.

Small-diameter vertical shafts constructed in the shallow space of steep mountainous areas - ScienceDirect

Mining Weekly - No 'mucking about' with safety for UMS

Takashi HARA, Professor, Doctor of Engineering, University of Toyama, Toyama, U Toyama, Civil Design and Engineering

Vertical Shaft Rock Drilling with an Excavation Diameter of 8-12 Meters - China Vertical Shaft Excavator, Vertical Shaft Mining Rig

Deep Excavation Support Systems Speed Plant Construction