Uttarakhand tunnel rescue: What is rat-hole mining, used in rescue operation, & how does it work?
Edited By WION Video Desk
Published: Nov 27, 2023, 23:15 IST | Updated: Nov 27, 2023, 23:15 IST
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Rat-hole mining is a method of extracting coal from narrow horizontal seams - apart from this - it is a technique which is often employed in India's Meghalaya state where rat-hole mining has been used in the past.
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