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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.
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 ...
A mining hoist (also known simply as a hoist or winder) [6] is used in underground mining to raise and lower conveyances within the mine shaft. It is similar to an elevator, used for raising humans, equipment, and assorted loads. Human, animal and water power were used to power the mine hoists documented in Agricola's De Re Metallica, published ...
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 ...
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 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 ...
The Magny shaft is one of the main shafts of the Ronchamp colliery, located in the commune of Magny-Danigon, in the French department of Haute-Saône and the Bourgogne-Franche-Comté region. With a depth of 694 meters, it was the deepest mine shaft in France when it was commissioned in 1878.
Petherick Mine Cap (Horizontal Shaft), July, 2009. 1/4 inch or thicker steel-plating is also used, on both horizontal and vertical shafts. These allow for easier customization than concrete, cutting access holes in steel is far easier than building the concrete forms necessary for the same result.