upcast

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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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References in periodicals archive ?

(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'.

The state and gold miners' health in Victoria, 1870-1910

Two new 5.7 m diameter upcast shafts (VS4A1 and VS4A2) will be raisebored from surface to 800 m.

KCM makes progress: After almost two years in operation under very adverse conditions, KCM is making headway and significantly raising production, as John Chadwick saw on a recent visit

UPCAST technical documentation Available at: http://www.upcast.com (accessed 12 May 2017).

CALCULATION OF THE EQUIVALENT ELECTRICAL PARAMETERS OF THE INDUCTOR OF INDUCTION CHANNEL FURNACE WITH DEFECTS IN ITS LINING

The explosion occurred on a hot day, when there would have been little natural convection, and there was some doubt whether the furnace above the upcast had been lit the previous night.

struggle and strife; It was the harshest of all industries, with Welsh miners only expected to live until the age of 40 at one time. In an extract from a new book on our coal industry, Ronald Rees charts the dangerous circumstances under which our men, children and often women worked

The underground workings are ventilated by four main upcast fans, two sited on surface and two underground.

Challenge on the Zambian Copperbelt

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.

COMPARATIVE ANALYSIS OF ELECTRICAL AND THERMAL CONTROL OF THE LINING STATE OF INDUCTION APPARATUS OF COPPER WIRE MANUFACTURE

Currently, he's building another headstock for the upcast shaft, the one used to ventilate the mine.

It's mine... all MINE! John has dug deep to create his own tribute to ironstone industry

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.

South African suppliers

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.