Uttarakhand tunnel collapse: Rescuers to drill new tunnels for trapped India workers
Officials say they plan to drill two parallel tunnels which could provide an "escape route" to the workers. https://www.bbc.com/news/world-asia-india-67471018Reply on topic: 18 Kilometrelik Mavi Tünel'de 7. kilometreye ulaşıldı
Mavi Tünel (blue tunnel) excavation reach 7. kilometre. It is last piece of Konya Ovası Projesi (KOP - Kon...on needs. Two excavation methods used. TBM for 11,5 kilometer. Rest with drill and blast. So...After 12 years, excavation of Austria's longest rail tunnel has been completed
Breakthrough has been achieved in the 33 kilometer long Koralm Tunnel. Excavation of the tunnel started in 200...ailway tunnel in Austria. The south tube of the tunnel was excavated using drill & blast whil...China invents a new tunneling machine: The Boring and Blasting Machine (TBBM)
Tsinghua University and China Railway Science and Industry Group (CRSIC) have jointly developed a new tunneling machine. The new Tunnel Boring and Blasting Machine (TBBM) can deploy boring and drill & blast tech...
cover tunnel photo by: Matt Brown from London, England / CC BY
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