Here's how the tunnel boring machine, or TBM, works: As the 200-ton TBM moves forward, a round cutter head studded with titanium teeth grinds into the tunnel face and splits large chunks off the rock.

A novel tunnel boring ... and to start cutting by the end of July, paving the way for the introduction of narrow-reef boring in January, by narrow-reef boring machines that will be equipped ...

The minister on Wednesday said the TBM (Tunnel Boring Machine) that is struck inside will be cut into pieces by using gas cutters and removed. After this, the Army, Navy, Rat Miners and National ...

TERRATEC, a manufacturer of tunnel boring machines ... disassembly if necessary. The machine's CutterHead is fitted with 15in heavy-duty back-loading disc cutters and is driven by variable ...

After multiple delays, including a 9-month delay involving a century-old anchor, the Chesapeake Bay Bridge-Tunnel (CBBT) expansion achieved a major milestone as its tunnel boring machine reached ...

The rescue teams’ leaders informed that cutting the tunnel boring machine (TBM) platform into small parts was going on swiftly as also the removal of debris (soil) covering the TBM. The parts ...