This article is devoted to the prediction of the residual life based on an estimate of the technical state of the induction motor. The proposed system allows to increase the accuracy and completeness of diagnostics by using an artificial neural network (ANN), and also identify and predict faulty states of an electrical equipment in dynamics. The results of the proposed system for estimation the technical condition are probability technical state diagrams and a quantitative evaluation of the residual life, taking into account electrical, vibrational, indirect parameters and detected defects. Based on the evaluation of the technical condition and the prediction of the residual life, a decision is made to change the control of the operating and maintenance modes of the electric motors.

Based on the literature review, the authors arrive at the conclusion that abrasivity of rocks is not only governed by their strength, but also by the structure and parameters of mineral inclusions, such as shape, size and amount. In terms of the Khibiny’s apatite–nepheline ore of various kinds with different strength and mineralogical composition, it has experimentally been estimated using the modified Baron–Kuznetsov procedure how the strength of rocks affects the wear rate of specimens made of steel 110G13L that is most often used for manufacturing rapidly wearing parts of mining equipment. It is found that for all ore kinds tested, the steel wear rates are approximately the same irrespective of the ore strength. It has been supposed that on abrasion of steel on hard rock (f ~ 10) composed of grains of hard tabular nepheline with thin partings of relatively soft fine-grain apatite, nepheline grains disengage slowly, the contact surface becomes smooth and steel wear rate is reduced consequently. On the other hand, on abrasion on weak rock (f ~ 0.5) composed mostly of apatite, fast failure of this type rock causes continuous exposure of rough-surface apatite grains, which accelerates steel wear resistance. On stee

The Arctic region of Russia is of strategic importance to the country due to the presence of important sea routes, military bases and a wide variety of minerals. At the same time, despite the strategic importance of the region, its development is slow due to various environmental problems. In addition, there are various environmental problems that hinder the full development of the North of Russia (global warming, air, water and soil pollution). The threat of environmental instability is largely due to the activities of industrial enterprises in the region; as a result, the production process must be modernized in such a way as to eliminate or minimize possible risks to the environment. The article identifies the main problems of development of the mining and industrial complex of the Arctic region of Russia. The directions and ways of solving the identified problems, ways of achieving environmentally responsible nature management and establishment of circular economy in the region are considered. The main results of the study are the presentation of the relationship between the identified environmental problems and ways to solve them, the analysis of the negative impact of a number of mining companies on the Arctic environment, and the calculation of the economic effect of the introduction of water treatment facilities at the company of PAO MMC Norilsk Nickel.