Shaft 1 for the Oyu Tolgoi underground mine is completed to a final depth of 1,385 metres. This marks the deepest underground shaft ever excavated in Mongolia and, at the time, one of the deepest in Asia.
Shaft 1 for the Oyu Tolgoi underground mine is completed to a final depth of 1,385 metres. This marks the deepest underground shaft ever excavated in Mongolia and, at the time, one of the deepest in Asia.
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