1. Institute of Trade and Services, Siberian Federal University, 79 Svobodny Av., 660041 Krasnoyarsk, Russia
2. Open Pit Mining Department, T.F. Gorbachev Kuzbass State Technical University, 28 Vesennya St., 650000 Kemerovo, Russia
3. DOH Hydraulics Center, Polska Grupa Górnicza S.A., ul. Powstańców 30, 40-039 Katowice, Poland