The influence of aggregation of the speed of the sleeve conveyor and the combine on the outlet of lava

Abstract

Stadnik M. I., Semenchenko A. K., Belitsky P. V., Semenchenko D. A. The influence of aggregation of the speed of the sleeve conveyor and the combine on the outlet of lava // Herald of the DSEA. – 2019. – № 2 (46). – Р. 97–102.

The intensification of processes, which is inherent in modern mining systems, involves increasing the load on technological, transport and auxiliary equipment of coal enterprises. Freight traffic on mine transport has a high unevenness, which significantly increases the amount of specific energy consumption for cargo transportation. The reason for the uneven cargo flow from the lava is the uneven feed rate of the combine during the technological cycle of its operation. Adjustment of the original cargo flow from the bench by adjusting the speed of the downhole conveyor under favorable conditions allows to minimize the required amount of technological capacity of the silo hopper, its mass, to fit its dimensions in the dimensions of the cross-section of the gutter. Therefore, the question of determining the possibility of regulating the speed of transportation of minerals by a conveyor belt is urgent and can greatly simplify the solution of the problem of introduction of a controlled drive on machinery and equipment of inland transport of a mining enterprise. Therefore, the purpose of this work is to determine the analytical method using the results of experimental studies of the influence of the method of regulating the speed of the lava conveyor on the non-uniformity of the original cargo flow from the lava. In order to achieve this goal, a mathematical model of the process of formation of the original cargo flow from a bench equipped with a cleaning combine and a bench scraper conveyor with an adjustable drive was developed, which takes into account the parameters of the technological cycle of the combine work, the speed and direction of movement of the combine, speed. Experimentally established: the coefficient of unevenness of the original cargo flow from the lava is greater than the value recommended by the conventional method of calculating the means of transport of coal from complex mechanized lava. Established analytically: the largest reduction in the unevenness of the original cargo flow from the lava in the experimental conditions without changing the design of the lava conveyor is achieved by stepwise control of the conveyor speed with two-speed drive motors with a ratio of low and high speeds is less, but is less.