The world''s worst coal mining disasters
May 15, 2014· The Mitsui Miike coal mine explosion on 9 November 1963, was the second deadliest coal mining disaster in Japan after the Mitsubishi Hojyo Coal Mine Disaster in 1914. 458 miners were killed in the accident and 833 were injured. It was a coal dust explosion around 500m below the mine''s ground level entrance.