JUSTIFICATION OF THE NEED FOR MODERNIZATION OF SURFACE MINER TO INCREASE THEIR OPERATIONAL PRODUCTIVITY
The article analyzes the losses of working time of surface miner during the exchange of dump trucks under loading during the development of deposits of various minerals. The substantiation of the proposed technical and technological solution for the modernization of a surface miner is given by installing an intermediate hopper on it, which allows non-stop layer-by-layer milling of the rock mass when working in conjunction with dump trucks. Comparative calculations of the operational performance of the surface miner of the traditional design and the modernized miner when they work together with dump trucks of different carrying capacity have been carried out. The greatest effect on the relative increase in operating productivity by 18-25% can be achieved when using the modernized miner harvester together with mining dump trucks with a carrying capacity of 27-30 tons on mountain ranges of low strength.