air drift

air drift

[¦er ‚drift]
(mining engineering)
A roadway, generally inclined, driven in stone for ventilation purposes.
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References in periodicals archive ?
Tenders are invited for Construction of air shaft, air drift and fan house at vijay west mine of chirimiri area.
As altitude increases, air pressure drops and the gas molecules that make up air drift apart.
When the hole breaks up during October and November, pockets of ozone-depleted air drift northward and mix with air over New Zealand and other regions in the southern hemisphere.
Temperatures in England and Wales should drop by the end of the week as cooler air drifts down from the far north.