The Influence of Parameters of Drilling and Blasting Operations on the Performance of Hydraulic Backhoes at Coal Open Pits in Kuzbass

drilling and blasting operations. When developing coal-bearing zones of complex-structured coal deposits, due to the design features of
working equipment, mobility and autonomy, hydraulic backhoe excavators are able to perform both mining and overburden operations more
efficiently than rope shovels. Hydraulic backhoe excavators are extracting machines with downward scooping, which determines the
working out of shotpile of the blasted rock in several layers. Therefore, the primary technological directions of increasing the efficiency of
backhoes’ operations are the justification of parameters of drilling and blasting operations to ensure a rational degree of rock crushing and
rational parameters of the face for maximum realisation of the design features of excavators. As a result of research, the specific
consumption of explosive and the diameter of explosive boreholes are among the most significant controlled technological factors that affect
the quality of rock crushing. The substantiation and practical application of rational technological parameters for hydraulic backhoes at the
open coal pits can provide higher technical and economic indicators on the backhoes application, compared to the rope shovels. The
research was based on the data from Kuzbass (Kemerovo region, Russia) coal deposits being developed by open pits.