Reuters
[Source: Reuters]
Rescue workers renewed efforts to reach 40 men trapped for a fifth day inside a collapsed highway tunnel in India, though progress was slow as they began drilling through rock and soil debris.
Authorities said they were confident an advanced drilling machine flown in from New Delhi will speed up the rescue at the site in the northern state of Uttarakhand.
The plan is to drill and create space for a pipe that can be used by the trapped men to crawl to safety.
The 4.5 km (3 mile) tunnel is part of the Char Dham highway, one of the most ambitious projects of Prime Minister Narendra Modi’s government. The $1.5 billion project aims to connect four Hindu pilgrimage sites through 890 km (550 miles) of roads.
Authorities have not said what caused the tunnel to cave in but the region is prone to landslides, earthquakes and floods.
Drilling had penetrated about 12 metres (40 ft) of debris on Thursday evening, officials said, adding that they had to cover a total distance of about 60 metres.
The machine can drill through about 2-2.5 metres of rock per hour and had faced “obstructions in the form of boulders or rods and small cement blocks”, they said.
“There is a major challenge of keeping the alignment straight, which is the reason that it is taking a lot of time,” Devendra Singh Patwal, a disaster management officer, told Reuters.
The process will have to begin afresh if the alignment changes, he added.
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