Coal India Limited (CIL) is an Indian state-controlled coal mining company headquartered in Kolkata, West Bengal, India. It is the largest coal producer company in the world and contributes around 82% of the coal production in India.CIL is the largest coal producing company in the world. It produced 536.51 MT (million tonne) coal during FY2015-16.Coal India operates through 81 mining areas in eight states in India. As on 1 April 2015, it has 430 coal mines out of which 175 are open cast, 227 are underground and 28 are mixed mines.
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