Uttarakhand tunnel collapse: What are the 5 plans to evacuate trapped workers?
Hindustan TimesA total of 41 workers are trapped for over a week in a collapsed tunnel in Uttarakhand and rescuers are working nonstop on different plans to evacuate them. Horizontal boring using augur machine The National Highway Infrastructure Development Corporation Limited team will recommenc it drilling from the mouth of tunnel from the Silkyara side after it hit a snag on Friday once it dug 22 metre through the debris. Another horizontal drilling from the side In order to prepare an alternate life-saving escape, the Rail Vikas Nigam Limited has been given the responsibility to carry out micro-drilling from the left of the tunnel. Another vertical tunnel from the top The Oil and Natural Gas Corporation has been tasked with digging another vertical tunnel at the end of tunnel at 2.3 km-mark from the Silkyara side. Rescue tunnel from another end of tunnel A 483-metre-long yet narrower tunnel will be made throught the Barkot end of the tunnel by the Tehri Hydro Development Corporation using the conventional drill and blast method.