Mining

Uttarakhand tunnel rescue: Rat hole mining employed to

Uttarakhand tunnel rescue: Rat hole mining employed to free workers

#Uttarakhand #tunnel #rescue #Rat #hole #mining #employed

“WION”

As construction workers still remain trapped in the Silkyara tunnel, the rescuers are now using the ‘rat-hole mining’ technique in order to create an escape passage. In this technique, holes are drilled in order to mine coal in small quantities. Take a look.

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