upcast


Also found in: Dictionary, Thesaurus.

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.
References in periodicals archive ?
f) Painting a 2 m wide and 15 m long stretch on UPCAST road journeys
(71) William Abraham, Inspector of Mines for the Bendigo district, reported: 'Some of our northern mines have recently started shafts from the surface, and have made a great mistake in not sinking the shaft with four compartments, one to be used for an upcast'.
UPCAST technical documentation Available at: http://www.upcast.com (accessed 12 May 2017).
The underground workings are ventilated by four main upcast fans, two sited on surface and two underground.
Each fan is placed in a separate building with the inlet connected directly to the upcast shaft.
All these tasks need to be addressed during the melting of ultrapure oxygen-free copper in induction channel furnaces, in particular in the UPCAST furnaces [6], the application of which is expanded due to a number of technological advantages.
Currently, he's building another headstock for the upcast shaft, the one used to ventilate the mine.
There is also a 9 m by 11 m elliptical shaft, some 156 m deep, equipped with a precast concrete brattice wall to provide upcast ventilation in the one portion of the shaft and a 12 t capacity conveyance located on rope guides in the other.
The Rudna mine covers 78 [km.sup.2] and has 10 shafts: three hoisting, three upcast ventilation shafts, and four for service.
Once holing has been made with the service shaft and upcast ventilation is commissioned, the development rate from the exploration shaft can be raised to more than 50 m/d.