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Shaft mining or shaft sinking is the action of excavating a mine shaft from the top down, where there is initially no access to the bottom. [1] Shallow shafts , typically sunk for civil engineering projects, differ greatly in execution method from deep shafts, typically sunk for mining projects.
Headframe of the #1 Shaft at Oyuu Tolgoi. A steel headframe is less expensive than a concrete headframe; the tallest steel headframe measures 87 m. [4] Steel headframes are more adaptable to modifications (making any construction errors easier to remedy), and are considerably lighter, requiring less substantial foundations.
The Saint-Charles shaft (or No. 8 shaft) is one of the main collieries of the Ronchamp coal mine.It is located in Ronchamp, Haute-Saône, in eastern France.In the second half of the nineteenth century, this shaft made it possible to mine large coal seams, contributing to the company's golden age.
The unexpected discovery of a former mine shaft is unlikely to delay the rebuilding of a Nottinghamshire landmark, a council has said. Brinsley Headstocks is currently being re-erected after it ...
A drum hoist (steel wire rope visible) and motor. In underground mining a hoist or winder [1] is used to raise and lower conveyances within the mine shaft.Modern hoists are normally powered using electric motors, historically with direct current drives utilizing Ward Leonard control machines and later solid-state converters (), although modern large hoists use alternating current drives that ...
Downcast, downcast shaft. The downcast is the shaft by which fresh air descends into the mine. [6] [19] After a disaster at Hartley Colliery in 1862, legislation decreed that collieries should have two means of entering the coal workings. In effect this meant two shafts which aided ventilation. Downthrow. A fault, when approached from the ...
The new #4 shaft bottoms out at 2,840 m (9,320 ft) down. LaRonde mine expansion was completed in June 2016 at the depth of 3,008 m (9,869 ft), the deepest longhole open stopes in the world. [16] The deepest active mine in Eurasia and in Asia is Skalisty Mine of Nornickel, located in Talnakh. In September 2018 it reaches depth of 2,056 m (6,745 ...
Relatives of miners and community members wait near an opening to the mine shaft for artisanal miners underground to resurface in Stilfontein on November 13, 2024. - Emmanuel Croset/AFP/Getty Images