Preliminary determination of the train consist size and the number of locomotives for mine haulage
Abstract
Very often, when designing a mining enterprise, when equipping new horizons of existing mines, as well as when reconstructing mine transport, it is necessary to preliminarily determine the number of mine cars in the train and the number of working locomotives (contact and battery electric locomotives, diesel locomotives, motor locomotives, etc.). Usually, when solving such problems, the predetermined factors are: 1) the general traffic pattern (haulage) indicating loading and receiving points; 2) the productivity of the mine and individual loading points, determining the volume of mineral transportation; 3) the type and capacity of the mine car; 4) the technological scheme, operating mode and throughput capacity of the type of transport following the locomotive haulage. With the generally accepted method of calculating locomotive haulage, having all these data, usually on the basis of very general and non‑specific considerations, mainly guided by "analogies" and available standard equipment, one or another type of locomotive is selected. Next, based on its adhesive weight, the maximum train consist for the mine car type adopted is selected, all calculation checks are made (for starting the train, heating of the motors, braking distances, etc.) and the locomotive's operating mode is established. Finally, in conclusion, motion diagrams are constructed, the trip time, the number of trips per shift, the productivity of one locomotive, the required number of working locomotives are determined, and a haulage schedule is constructed, which should be the main production operational document, the conclusion and consequence of all the numerous preceding calculations, and an inviolable law for the enterprise.
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