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After
Damp
Gasses resulting from underground combustion, normally
carbon monoxide. This is a loose term implying any fatal
gas in a mine after an explosion or fire. |
Air
Shaft
A vertical opening into a mine for the passage of air.Airway
- Any passage in a mine along which an air current moves.
Some passages are driven solely for air. Other passages,
such as a main level, are all purpose, to move air, men,
coal, and materials. |
Anthracite
Coal of the highest metamorphic rank, in which the fixed
carbon content is between 92 percent and 98 percent. It
is hard, black, and has a semi-metallic lustre and semi-conchoidal
fracture. It ignites with difficulty and burns with a
short blue flame without smoke. |
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