Entry from US English dictionary
Choking or suffocating gas, typically carbon dioxide, that is found in mines and other underground spaces.
- The average blackdamp contains 10% to 15% carbon dioxide and 85% to 90% nitrogen.
- The water and blackdamp came from disused workings adjoining the mine.
- If any miners had survived the inrush, they would have been quickly killed by the blackdamp.
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