måndag 20 augusti 2007

Stress Causes Killer Mine Bumps

"If you throw a hand grenade, it explodes small pieces around it, and if you get hit by it, you die" It's a benign name for something that explodes like a hand grenade. Mine "bumps" shoot high-speed coal and rock at anyone in the way as support pillars buckle. via KSL-TV Salt Lake City - Original Story

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