Slovakia is poor in natural resources, including coal - the country's geological reserves count for only 390 mln tons of lignite and sub-bituminous coal; from the country's 21 coal deposits only 5 are operable now. Underground mining dominates in Slovakia.
At the Communist era and in the 1990s coal dominated as fossil fuel in Slovakia, it provided about 60% of the power output; however at Czechoslovakia time most of the coal was supplied from the Czech part of the country - Slovakia itself produced only 3.6 mtpa of lignite and sub-bituminous coal. Replacement of coal-fired technologies with those utilizing natural gas has reduced coal's share in energy production; coal production has declined respectively - now the country produces only 2.4-2.5 mtpa.
Slovakia continues to import bituminous coal from Czech Republic, Poland and Ukraine, as well as small volume of lignite from Czech Republic; half of coal import is presented with coking coal - to supply Slovakia's coke-chemical facilities.
Currently there are 3 coalmining companies in Slovakia and one export-import national operator. The largest coalminer - Hornonitrianske bane Prievidza - provides 72% of the country's coal production.