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What caused the NHPC tunnel disaster in Sikkim’s Namchi? | Explained

Methane trapped inside rock is suspected to have triggered the fatal blast. But how does this happen?

· 7/22/2026, 9:29:41 AM· 2 min read
What caused the NHPC tunnel disaster in Sikkim’s Namchi? | Explained
Methane trapped inside rock is suspected to have triggered the fatal blast. But how does this happen?
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