Coal mining | World Coal Association. worldwide and 787 Mt of lignite. Coal is mined by two methods: surface or 'opencast' mining, and underground mining. . Top ten coal producers (2016).coal mining 2014,Illegal coal mines a 'lifeline' in Ukraine | Russia | Al JazeeraDec 15, 2014 . Seventy percent of the Donbass area's coal mines have closed because of the fighting, and just 24 remain operational, Ukraine's deputy.
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