1. Faculty of Mining, Donetsk National Technical University, Sofia Kovalevska Street 29, 43012 Lutsk, Ukraine
2. Faculty of Civil Engineering and Resource Management, AGH University of Krakow, Mickiewicza 30 Av., 30-059 Krakow, Poland
3. Research Centre in Kraków, Institute of Geological Sciences, Polish Academy of Science, Senacka 1, 31-002 Kraków, Poland