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upcast
(redirected from upcast shaft)

   Also found in: Dictionary/thesaurus 0.01 sec.
upcast [′əp‚kast]
(mining engineering)
The opening through which the return air ascends and is removed from the mine; the opposite of downcast or intake.
An upward current of air passing through a shaft.
Material that has been thrown up, as by digging.


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And the last piece of the monumental jigsaw will be to construct a fan house, which drew fresh air into the mine via the upcast shaft.
 
 
 
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