The mine produces ores of copper, nickel and other precious metals. The main shaft of the mine is 4,130 feet (about 1,259 meters) below the surface.
An accident at a small-scale coal mine project in a northern Mexico border state has left an undetermined number of miners trapped on Friday, officials said.
Moscow, Jul 29: At least 20 miners were killed and 17 others went missing in two separate accidents at coal mines in Ukraine today, officials said. Sixteen miners were killed instantly after an explosion in
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