TECHNICAL AND ECONOMIC CALCULATIONS OF THE USE OF LOADERS AS EXCAVATION AND TRANSPORTATION EQUIPMENT OF OPEN PITS

Abstract

The desire to increase the depths of open-pit mining is associated with its greater safety and technical and economic efficiency, when gaining the completeness of the development of geo-resources. The search for options for the quarry transport system for deep quarries is mainly determined by their technical and economic efficiency. These requirements are met by a number of schemes with
steeply inclined lifts (conveyor or rope), while it is preferable to reduce the recoil shoulder of the secondary transport link. In these conditions, the question arises of finding an alternative to the excavator-car complex in the cramped conditions of the deep pit zone. This article considers the technical and economic indicators of front loaders when working as dredging and transport machines. Calculations were made for 29 models of front loaders, including BelAZ, Caterpillar, LeTourneau, Komatsu, Liebherr, and MoAZ. The bucket capacity varies from 2.2 to 40.5 m3. The dependences of the performance of loaders on their load capacity, the distance of transportation and the lifting height are established. The influence of these factors on the costs, both capital and operational, for the use of loaders is determined.