On some issues of the theory of mine electric locomotive haulage

Abstract

The observations of electric locomotive haulage at the mines of Kounrad, Magnitogorsk, Karaganda and Cheremkhovo revealed a significant discrepancy between productivity and design data. In a number of cases, the actual productivity of electric locomotive haulage did not reach even 50% of the estimated one. Timekeeping data for the Magnitogorsk open-pit mine, as well as for the mines of the Cheremkhovo coal basin, indicate unproductive waste of time on various delays and accidents due to inconsistency in the work of individual transport links, transport with sections and quarries, due to the lack of a schedule and the poor condition of the tracks and rolling stock. This paper aims to highlight some issues related to the operation of electric locomotives themselves. It has been established that the low productivity of electric locomotive haulage is also explained by poor adhesion of the locomotive wheels to the rails, that the operation of the electric locomotive itself does not correspond to the design data. The actual speeds of electric locomotives barely reach 50% of the speeds obtained from the engine characteristics, and the size of the train composition is much less than the calculated one. The article provides proposals for increasing the actual productivity of electric locomotives in mine conditions.