The processing results of the extensive statistical material characterizing the level of power consumption of Kuzbass coal mines are presented. At the same time, in the formulation of the research problems, the authors have come from the fact that the power consumption of mine is a function of many variables. This has revealed the tendencies not only in development of power consumption, but also many other factors determining its level: deepening of mining operations, growth of gas content and, therefore, increase in electric power costs for ventilation of mine roads, increase in water inflow, etc. On the basis of statistical researches it is shown that the worsening of mining-and-geological conditions of Kuzbass coal mines leads to an increase in specific consumption of the electric power. Quantitative estimates of the impact of the mining-and-geological and mining factors on the mine power consumption are established. The presented results can be used to solve the task of increasing the efficiency of power usage in the coal mines, both at the design stage, and during normal operations of the enterprise.

Abstract. The method of power consumption forecasting based on hierarchy of the objects forming system is considered. One of perspective methods of numerical modeling of casual processes, i.e. direct generation of the studied process realization by means of the Monte Carlo method is involved in the solution of this task. The mining equipment belongs to systems with final number of states, and the separate realization of their evolution process is enabled by method of "probabilistic automata method" which generates transitions between conditions of the system by some rules set in advance. The parameters which form the basis for drawing up a matrix of probabilities of transitions when modeling a running cycle of the shearer using this method are determined on the basis of statistical data. The regularities of power consumption by separate units, subsystems and the enterprise in general established by means of the offered model can be applied to the solution of a problem of increase in efficiency of the electric power use both at a design stage, and to conditions of normal operation of the enterprise.

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Расчет нагрузок и потерь в электрических сетях разрезов связан с трудностями, вызванными неравномерностью индивидуальных графиков нагрузки экскаваторов-основных и наиболее энергоемких потребителей. Представлен метод расчета по нагрузочным диаграммам, позволяющий учесть неравномерность проявления нагрузки в течение цикла экскавации, что существенно повышает точность расчетов потерь в сетях по сравнению с расчетом по среднеквадратическому току.

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