Experts told him that the tunnel boring machine may have to be buried at the collapse site if efforts to repair and pull it back out of the tunnel fail. Two vents (tunnels) of about 5 metres each ...

This spot, as well as the others indicated by the dogs, were on the rock fall debris that buried the tunnel boring machine (TBM ... rescuers will get back to digging. “By Sunday morning ...

He was a Tunnel Boring Machine (TBM) operator ... the official said. It was buried under silt at a depth of about 10 feet. A member of the rescue team told a TV channel the operation was speedened ...

The removal of boulders, debris and parts of the tunnel boring machine (TBM) from the Srisailam Left Bank Canal (SLBC) tunnel has gained momentum with the extension of conveyor belt for 100 more ...

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.