“…Offering the directions for improving the environmental safety of coal mining regions, the authors, among other things, proceeded from the successful world and regional experience described in the studies of such scientists as Vishnevsky V., Aleksandrov I., Polovyan A., Qixing Zhou, Steinecke K., Chuturkova R., Simeonova A., Bekyarova J., Ruseva N., Yaneva V. and others [11][12][13][14][15].…”