Tuesday, September 15, 2009

Gold Mines

Johannesburg
Gold Mines
The largest gold resources in the world were found in the area of the Witwatersrand and it is therefore not a surprise that South Africa is one of the world leaders in gold mining. Johannesburg's other name, "Egoli" means City of Gold. The gold-bearing stone is mined at considerable depth. The Western Deep Level Mine, with its shafts of depths to 3900 m, is one of the deepest in the world. Mining at such deep levels is usually highly problematic, because the temperature rises by 1 degree every 33 metres.

However, the geo-thermal conditions in South Africa are favourable. Nevertheless, immense machinery and air-conditioning are still required to make the working conditions underground tolerable. The air is cooled down to 32 degrees, but the workers have to cope with almost 100 percent humidity.

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