In the reconstruction of the transport system of pit "YuGOK" in order to maintain its production capacity it was necessary to build a spiral deep trench for rail transport. This construction, especially in the eastern wall, is to be produced in limited working area and under unfavorable geological conditions (presence of planes of weakness with a slide in the pit and a close residential village). Therefore, the numerical estimation of seismic influence on the stability of mass blasting on rock benches to determine safe DBO parameters during their construction is an important scientific task. Definition of the seismic influence caused by holding mass blasting on the stability of the benches and bench groups is currently a poorly understood issue. In the above mentioned methodological instructions only the fact that the negative impact of seismic mass blasting on the stability of open mines is mentioned, but analytical expressions for the numerical determination of the influence are not given. Provides theoretical aspects of the geomechanical process that take place in the open-pit mine slope. The calculation of the safety degree along the redesigned most dangerous sliding surface is performed by means of the algebraic summation of the forces. The refraction point of the sliding surface is determined by a gradual approximation using incremental calculations. The bench stability calculation in case of eastern pit wall bench groups of "YuGOK" is based on their designed position after the completion of the railway spiral V-shaped extended trench. The geotechnical schemes used to calculate the stability of the benches and bench groups. To determine the numerical value of the rock massif vibration acceleration in mass blasting, let us use the results of seismic monitoring. Based on analysis of previous works, the analytical expressions for determining the degree of stability of open pit mining considering seismic impact of mass blasting were obtained. The parameters of the drilling and blasting operations (DBO), the use of which provide the long-term sustainability for benches and bench groups in the pit were elaborated.

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