The vertical drilling from the top of the hill makes swift progress as 36 metres of drilling work has been completed so far out of the 86 metres needed to reach the 41 trapped workers in the Silkyara tunnel, as per officials. Now the drilling work is being done to lay an 800/900 mm or 1.2 m diameter pipeline to aid the rescue.
Rat-hole mining experts also reached the disaster site to help tackle the challenge simultaneously from another front. Twelve rat-hole mining experts will be involved in manual drilling and excavation horizontally through the last 10- or 12-metre stretch of debris of the collapsed portion of the under-construction tunnel on Uttarakhand’s Char Dham route.
Also read: Uttarkashi tunnel collapse updates - November 26
The teams have set a target of vertically drilling through 86 metres of mountain in 100 hours, if there are no unexpected hurdles.
Briefing the media about the vertical drilling, as the rescue operation entered its 15th day on Sunday, Additional Secretary (Technical, Road and Transport) Mahmood Ahmed said there could be a need to change the “needle” or head of the drilling machine after a point of time and necessary arrangements for the same are already in place.
Watch: Uttarkashi tunnel collapse | First visuals of trapped workers emerge
Follow for all Live Updates