Mining deep underground is difficult and dangerous. The temperature increases with depth, typically around 1 to 3 °C per 100 m, will cause an increase of temperature the lower you get. A 4,000 m deep mine has a temperature of between 60 °C and 140 °C, depending on the location. The air temperature might be controlled by pumbing cold air into the mine, but still the climate is not sutable for hard work. As a result there are very few really deep mines and they are located at consolidated areas like South Africa, where the geothermal gradient is rather low.
Name | Depth | Location | Type | Comment |
---|---|---|---|---|
Mponeng Gold Mine | 4,000m | Southwest of Johannesburg, South Africa | gold | |
TauTona Mine (Western Deep No.3 Shaft) | 3,900m | West Wits, South Africa | gold | |
Savuka Gold Mine | 3,700m | West Wits, South Africa | gold | |
East Rand Mine | 3,585m | South Africa | gold | |
Driefontein Mine | 3,420m | Gauteng, South Africa | gold | has produced more gold than any other gold mine, about 2292 tons |
Kusasalethu mine | 3,388m | Gauteng, South Africa | gold | |
Empire Mine | 3,355m | United States | gold | |
Kloof mine | 3,347m | South Africa | gold, uranium | |
Blyvooruitzicht mine | 3,213m | South Africa | gold, uranium | |
Kolar Gold Fields | 3,200m | India | gold | |
Moab Khotsong mine | 3,052m | Vaal River, South Africa | gold | |
Kidd Creek Copper and Zinc Mine | 3,014m | Ontario,Canada | Copper, zinc | |
LaRonde Gold Mine | 3,008m | Quebec, Canada | gold, copper, silver, zinc | |
Morro Velho | 3,000m | Brazil | gold | |
South Deep mine | 2,998m | South Africa | gold | has the deepest single-drop mining shaft with a depth of 2,991m |
Target 1 Mine | 2,945m | South Africa | gold | |
Lucky Friday Mine | 2,600m | Idaho, USA | silver, lead, zinc | |
Phakisa Mine | 2,426m | South Africa | gold | |
Great Noligwa Gold Mine | 2,400m | South Africa | gold | |
Creighton Mine | 2,390m | Ontario, Canada | Nickel | |
Bambanani Mine | 2,365m | South Africa | gold | |
Tshepong Mine | 2,349m | South Africa | gold, uranium | |
Kopanang mine | 2,334m | Free State, South Africa | gold, uranium |