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This list of deepest mines includes operational and non-operational mines that are at least 2,224 m (7,297 ft), which is the depth of Krubera Cave, the deepest known natural cave in the world. The depth measurements in this list represent the difference in elevation from the entrance of the mine to the deepest excavated point.
Deep mines were not required at first, so a large number of small operations sprang up. There was a complex legal system for concessions, and often multiple layers had different owners. Entrepreneurs started going deeper and deeper, thanks to the good pumping system. In 1790, the maximum depth of mines was 220 meters (720 ft).
The Kola Superdeep Borehole SG-3 (Russian: Кольская сверхглубокая скважина СГ-3, romanized: Kol'skaya sverkhglubokaya skvazhina SG-3) is the deepest human-made hole on Earth (since 1979), which attained maximum true vertical depth of 12,262 metres (40,230 ft; 7.619 mi) in 1989. [1]
The Jeddo Tunnel (also called the Jeddo Mine Tunnel [2]) is a drainage tunnel at water level in Pennsylvania. It is one of the Coal Region 's biggest discharges of mine water. [ 3 ] [ 4 ] The tunnel is five miles (eight kilometers) long and was constructed between 1891 and 1894, and at the time of its construction, was reputed to be the largest ...
Longannet was the last deep mine of any significance in Scotland and its closure effectively ended underground coal mining in Scotland. [2] As of 2008, opencast coal mining continued in Scotland, with 51.4% of Great Britain's opencast coal mines (18 out of 35 mines) and 60.1% of the saleable production by weight (5.68m tonnes out of 9.45m tonnes).
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The Hillcrest mine disaster, the worst coal mining disaster in Canadian history, occurred at Hillcrest, Alberta, in the Crowsnest Pass region, on June 19, 1914, 9:30 am. [ 2 ] The disaster was reported by several news outlets including the Calgary Herald as the world's third-worst mine disaster at the time, after the Fraterville Mine disaster ...
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