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ALGORITHM FOR DETERMINATION OF BRAKE EFFICIENCY OF INDUSTRIAL RAILWAY TRAINS

The main differences between the operating conditions of industrial railway transport from the main-line ones, which feature the performance of technological transportation, i.e., the transportation of goods within the local boundaries of enterprises (domestic technological transportation), and import (export) of goods to other modes of transport (external transportation). Industrial railway transport plays an important role at mining enterprises, as the working conditions of these enterprises are not constant and getting continuously more complicated during the entire period of field development. In this regard, one of the most important factors in ensuring the train safety is the braking efficiency. The calculation of the braking efficiency of a quarry train is performed according to special rules, and the parameters of the braking process that affect the braking distance are set by coefficients. As an estimated characteristic of braking efficiency for industrial railway transport, the maximum speed is taken, at which the braking distance should be no more than 300 m, regardless of the magnitude of the slope of the railway track. For the first time it is proposed to determine the allowable speed by the iterative method using a correction factor, the choice of which is due to the fact that the relationship between speed and braking distance is described by a quadratic function. The calculation showed that in five iterations the difference between the calculated and normative values of the braking distance of 0.01 m (1 cm) is achieved, which indicates the efficiency effect of the proposed determination procedure. The software allows you to automatically perform calculated studies for a given range of values of the slopes. The results of the train calculation in a specified range of slope values are given, as well as an analytical expression for determining the maximum speed for a given arbitrary slope value. Key words: allowable speed, braking distance, iterative process, correction factor, algorithm.