Officials consider other rescue plans to reach trapped workers in India

19 November 2023, 07:54

India Tunnel Collapse
India Tunnel Collapse. Picture: PA

The construction workers have been trapped since November 12.

Officials trying to reach 41 workers who have been trapped in a collapsed tunnel in northern India for eight days were contemplating alternative rescue plans on Sunday after snags with a drilling machine caused them to halt digging.

A new drilling machine arrived at the accident site in Uttarakhand state on Saturday to replace one that was damaged while breaking through the rocks and debris.

They had been using the drill to create a space to insert wide pipes through which the trapped workers could crawl to their freedom.

Authorities have so far drilled 24 metres (79 feet) through rubble and debris, but it would require up to 60 metres (197 feet) to allow the workers to escape, said Devendra Patwal, a disaster management official.

India Tunnel Collapse
An earth-mover makes a vertical drill on the top of a mountain where a tunnel collapsed in Uttarakhand state (AP Photo)

Officials on Sunday were considering new angles for extracting the workers. Deepa Gaur, a government spokesperson, said this included possibly using the new machine to drill from the top of the hill, under which the workers have been trapped inside the collapsed tunnel.

This method would be more time-consuming, taking an additional four or five days, she added.

Earlier, rescue efforts hit a snag when a loud cracking sound was heard within the tunnel, startling those overseeing the operation, who paused the drilling and found parts of the machine damaged, said Tarun Kumar Baidya, director at the National Highways and Infrastructure Development Corporation Limited (NHIDCL).

The construction workers have been trapped since November 12, when a landslide caused a portion of the 4.5-kilometre (2.8-mile) tunnel they were building to collapse about 200 metres (650 feet) from the entrance. The hilly area is prone to landslides.

The site is in Uttarakhand, a mountainous state dotted with Hindu temples that attract many pilgrims and tourists.

Highway and building construction has been constant to accommodate the influx. The tunnel is part of the busy Chardham all-weather road, a flagship federal project connecting various Hindu pilgrimage sites.

About 200 disaster relief personnel have been at the site using drilling equipment and excavators in the rescue operation, with the plan being to push 80-centimetre-wide (2.6-foot-wide) steel pipes through an opening of excavated debris.

Anshu Manish Khalkho, director at NHIDCL, said that after they paused the drilling on Saturday experts became concerned the drilling machine’s high-intensity vibrations could cause more debris to fall and hinder efforts.

The machine has a drilling capacity of up to 5 metres (16 feet) per hour and is equipped with a 99-centimetre (3.2-foot) diameter pipe to clear debris.

India Tunnel Collapse
People watch the rescue and relief operations (AP Photo)

Mr Khalko said drilling vertically from the top of the hill could also cause additional debris, but that they would opt for a specific technique designed for drilling through overburdened soil conditions where unstable ground make traditional methods more difficult.

This method, experts hope, would lead to less debris falling.

One challenge, however, is that drilling from the top means they would need to dig 103 metres (338 feet) to reach the trapped workers — nearly double than if they carried on digging from the front.

Authorities were also contemplating drilling from the sides and the ends of the tunnel.

Vijay Singh, an official at the control room, said they had also extended the pipe installed inside the tunnel through which the trapped workers were receiving food like nuts, roasted chickpeas, popcorn, and other essential items.

Oxygen supply is being administered through a separate pipe.

Doctors, officials and relatives were in constant touch with the workers, said Mr Patwal, the disaster management official.

He said two doctors at the disaster site were ensuring the workers’ physical and mental well-being and that they have supplied them with vitamins and tablets to treat anxiety.

But as the rescue operation stretches into its eighth day, families of those stuck underground are growing more worried, frustrated and angry.

“I am losing my patience,” said Maharaj Singh Negi, whose brother Gabbar Singh is among the trapped workers.

“The officials have not even briefed us about the future plans.”

By Press Association

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