(also upcast shaft) A shaft through which air leaves a mine.
- Approaching demolition, various holes appeared in the brickwork of the upcast shaft allowing access to the foolhardy.
- One of the shafts at Whinney Hill then became the upcast shaft for both collieries.
- A new upcast shaft was sunk by Allied Constructions Pty Ltd.
verb (past and past participle upcast)[with object]
Cast (something) upward: (as adjective upcast) upcast light
Definition of upcast in:
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