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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.
Shaft collar to DIN 705. The shaft collar is a simple, yet important, machine component found in many power transmission applications, most notably motors and gearboxes. The collars are used as mechanical stops, locating components, and bearing faces. The simple design lends itself to easy installation.
The TauTona Mine, formerly Western Deep Levels No.3 Shaft, [1] is a gold mine located in the West Wits gold field west of Johannesburg. The mine is near the town of Carletonville in South Africa . At approximately 3.9 kilometers (2.4 mi) deep, it is home to the world's second deepest mining operation, rivalled only by the Mponeng Gold Mine ...
When wet sinking a shaft the shaft is allowed to flood and the muck is excavated out of the base of the shaft underwater using a grab on the end of a crane or similar excavation method. Because the shaft is flooded, the lining can not be constructed at the excavation level of the shaft so this method only suits methods where the lining is ...
On October 20, 1877, the shaft reached the hard rock layer of the transitional terrain, without having encountered the second layer of coal, which was considered a bad sign by the engineers. [4] In 1878, the sinking of the large shaft was completed. It reached a depth of 694 meters, while the small shaft reached 651 meters. [5]
The company considered sinking another well (the Saint-Joseph well, which would be sunk the following year), but sinking a well can take five to six years, and the company needed immediate resources. It therefore decided to sink an inclined plane at the same time as the Saint-Joseph shaft, to reach the area to be mined more quickly.
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