Improving the energy efficiency of transport equipment in ore mining

Abstract

Abstract The article presents a General principle for evaluating the norms of specific energy consumption rates for ore extraction at mining enterprises, including the determination of daily well penetration and conversion coefficients of specific consumption for individual operations. Specific norms of electric power consumption for excavating and drilling are determined according to the developed methods. Analyzing the nature of the waveforms, it can be concluded that the greatest energy consumption during excavation is accounted for by the scooping process. When comparing individual cycles on oscillograms, it is seen that at almost the same maximum power, equal to 0.465 MW, a significant difference in the energy consumed per cycle (from 4.9 to 8.2 MW·s) occurs due to different scooping times. The economic feasibility of improving the crushing of rock mass by explosion to reduce the specific cost of electricity was determined, which allowed us to conclude that it is not advisable to make additional investments in drilling and blasting operations in order to reduce electricity consumption. As for drilling machines, the average electrical power consumed by one machine is determined based on the results of measurements. The power consumption was recorded taking into account the shunting operations of the machine. By integrating the load curve using the averaged area method, the amount of electricity consumed by the machine per shift is obtained.