Methodological basis for adaptation of the drilling and blasting parameters to changing mining and geological conditions when mining complex-structured deposits

The article addresses the issues of improving the design and implementation of process blasts of complex-structured rock masses in open-pit mining of solid minerals. The stages of adaptation are presented for the drilling and blasting technology in the new mining conditions in open pits of the Ural region, Siberia, Karelia and Kazakhstan. Systematization of the main factors that define the conditions for changing the drilling and blasting parameters is shown based on the data on in-situ physical and mechanical characteristics of rocks. The article shows transient processes in the classified form, which are used as the basis for the development of fundamental methodological principles for adapting the equipment and technology of drilling and blasting operations to the variable conditions of mining complex-structural deposits of solid minerals. A methodological approach is based on the established specific experimental data: the heterogeneity of the rock mass in terms of fracturing according to the roller-bit drilling data; the relationship between the detonation rate of emulsion explosives and the density and diameter of the explosive charge in its different ranges, the influence of the degree of attenuation of seismic blasting oscillations on the rate of displacement of the protected sections of the open pit walls at different directions of the explosive charge priming.