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Oh, I see our communication block. I'm suggesting an alternative mode ofThe outside air is warm, but the mine shaft air is cool, and henceBut mine shafts are often hotter at the bottom than at the surface.
more dense.
Wouldn't the air become heated at the bottom and become
less dense than the air at the surface?
Hot bottoms are generally found only in deep mines which go well below any
possible surface opening. Therefore, there it is very difficult to get
this hot air to participate in any natural circulation.