I.E. Kolesnichenko1, V.B. Artemiev2, E.A. Kolesnichenko1, E.I. Lyubomishchenko1 1 Shakhty Road Institute (branch) of the Platov South-Russian State Polytechnic University (NPI), Shakhty, Russian Federation 2 JSC SUEK, Moscow, Russian Federation Russian Mining Industry №4 / 2019 p.138-143