 For instance, the former state energy company, Slovenské elektrárne is obliged to buy coal for its power plant in Nováky, the only one fired with brown coal, exclusively from domestic sources.The incident happened in the old abandoned underground eastern shaft of the mine, belonging to Hornonitrianske Bane (HNB) Prievidza, a.s., the largest mining company in Slovakia, located at approximately .In the morning of August 10 at around 07