Search results
Results from the WOW.Com Content Network
Plasma deep drilling technology is one of several drilling technologies that may be able to replace conventional, contact-based rotary systems. These new technologies include plasma deep drilling, water jet, hydrothermal spallation and laser. Companies that embrace plasma-drilling method include GA Drilling, headquartered in Bratislava, Slovakia.
A tunnel boring machine (TBM), also known as a "mole" or a "worm", is a machine used to excavate tunnels. Tunnels are excavated through hard rock, wet or dry soil, or sand, each of which requires specialized technology. Tunnel boring machines are an alternative to drilling and blasting (D&B) methods and "hand mining".
Electrical plasma – is based on crushing by irradiation of plasma with high temperature up to 20 000°C; Direct transfer of heat – This technology is based on electrically melting rock at 1400°C; lava gravel will float to top; bore hole walls are of glass of surrounding rock. Cost decreases with depth, with no limit on depth of bore hole.
Rosie, the tunnel boring machine named after Akron's own Rosie the Riveter, has a sister coming to town later this year, and her name is Elaine.. Named after environmental advocate Elaine Marsh ...
A tunnel boring machine sits at the bottom of a construction site during a media tour at the Las Vegas Convention Center, Friday, Nov. 15, 2019, in Las Vegas. Officials held an event Friday to ...
Both incidents add to a series of safety episodes that have taken place since the Boring Company began work to expand its existing tunnel system—currently a 2.4-mile, one-way underground conduit ...
Freighter Fairpartner carrying the disassembled tunnel boring machine into the Port of Seattle in April 2013. Bertha was designed and manufactured by Hitachi Zosen Sakai Works of Osaka, Japan, and was the world's largest earth pressure balance tunnel boring machine, [14] at a cutterhead diameter of 57.5 feet (17.5 m) across.
The boring machine in June 2019. The first boring machine used by TBC was Godot, a conventional tunnel boring machine (TBM) made by Lovat. [26] [27] TBC then designed their own line of machines called Prufrock. [28] Prufrock 1 was unveiled in 2020, and was used mostly for testing.