There was a rock fall at Raspadskaya-Koksovaya mine. At the time of the accident there were 189 people underground. At the moment 46 miners have been brought to the surface, two of them required medical assistance. Two people are not getting in touch. The reason for the collapse was a seismic event, the company's press service said. Raspadskaya-Koksovaya mine is unique because of the most valuable K-grade coal in Russia, which metallurgists need, and the very difficult mining and geological conditions of its extraction.