ANALYSIS OF FAILURES OF MINING DUMP TRUCK COMPONENTS UNDER OPERATING CONDITIONS
This paper presents an analysis of operational factors that affect the process of mining and transportation of minerals by dump trucks in open-pit mining operations. The influence of operating conditions, such as low air temperature in winter, the presence of a dusty atmosphere, the slopes and radii of the curves of quarry roads, the characteristics of the transported rock mass on the failures of the components of quarry dump trucks allow us to determine the objectives of the study to increase their resourc e. It is shown that the share of the cost of moving quarry cargo reaches 45% of the total cost of production, and reducing the cost of transportation is very relevant. It is shown that the largest share of failures of BelAZ 7555 dump trucks is accounted for by the internal combustion engine (about 25%) and the chassis (about 20%), for BelAZ 75581 dump trucks, the internal combustion engine accounts for about 25%, and the gearboxes of the motor wheelsabout 30%. The results of the failure analysis can be used to justify the requirements for the design of robotic mining dump trucks with an electromechanical transmission. The conditions for improving the efficiency of the operation of technological transport are to reduce the operating costs of machines, increa se the reliability of individual elements of the complex technical system "dump truck", and improve the quality of technical service. Each of the conditions, in turn, includes many components and represents separate areas of research. The results of this study allow us to evaluate the weakest structural elements of a quarry dump truck and justify the increase in their resource, taking into account operational and climatic factors.