Research of Duration Influence of Loading and Unloading Operations on the Use Efficiency of Technological Motor Transport on Open Pit Iron Mines

Abstract

Purpose. The most common type of technological transport in open pit mines is automobile, which uses dump trucks with a capacity of 45 to 220 tons. The rock mass transportation volume with the use of motor transport at the iron ore industry is more than 350 million tons per year, or 27% of the total volume of open pit mines in the industry. Most of Ukraine’s high-capacity iron mines are forced to work in the conditions of intensification of mining operations, constant deepening and complication of mining and geological conditions. With increasing the depth of mines there is an increase of 1.3-1.7 times the transportation volume relative to the volume of the shipped rock mass and, as a consequence, a decrease in the efficiency of technological vehicles. The purpose of this work is to analyze the influence of using BELAZ open-pit dump trucks during loading and unloading operations on the efficiency. This will allow to develop the management measures to implement effective transport technologies aimed at reducing the cost of open pit iron ore mining and purposefully influence these production processes. Methodology. In order to solve the set tasks, the methods of technical-economic, correlation-regression, factor and situational analysis were used (to study the operation of open-pit dump trucks at mining enterprises). In order to formalize the methods of improving the efficiency of equipment and transport technologies, the methodology of operational accounting of mining conditions of open-pit dump trucks operation at mining enterprises was used. To assess the economic efficiency of the proposed management system of mining activities of open-pit dump trucks, a method of comparative economic analysis was proposed. Findings. The results of the research are practically implemented in the real conditions of operation of open-pit dump trucks and the economic effect of the implementation of the proposed measures is determined. Originality. The obtained results are practically implemented in the real conditions of operation of open-pit dump trucks and the economic effect of the implementation of the proposed measures is determined. Practical value. The forms of functional connection are substantiated and analytical dependences between the indicators characterizing the use efficiency of open-pit dump trucks during the technological transportations of iron ore and the time needed for loading and unloading operations are received. This dependency allows determining the reserves for improving the operation efficiency of open-pit dump trucks and the economic effect from the implementation of the measures proposed.