Abstract
The planned increase in the mine output from 6.5 to 13.6 million tons per year has set the task of reconstructing a conveyor transport in the eastern inclined shaft of the Raspadskaya mine. The roadway length is 4100 m; the reduced inclination angle is +7°40´. An attempt was made to combine all the positive global practices in one project: the distribution of drive power along the length of a conveyor belt, minimizing the capital cost of implementation. Within the framework of this article, an approach to choosing the speed of a con-veyor belt is discussed, a comparative analysis of the two most com-mon types of intermediate “tripper-type” and “belt-to-belt” drives is given; calculation of a belt conveyor with intermediate “belt-to-belt” drives providing non-reloading conveying in the eastern inclined shaft. Pull force calculations showed that a conveyor belt with four interme-diate “belt-to-belt” drives can be implemented as follows: belt width – 1400 mm, belt speed – 4.0 m/s, mono-material load-carrying belt – PVG-4000, mono-material drive belt – PVG-1400, 2-pulley drive units when mounted on one side: head drive power – 2×1000 = 2000 kW, intermediate drive power – 2×1600 = 3200 kW. Thus, the use of a conveyor belt with four intermediate “belt-to-belt” drives in the in-clined shaft will give the following results: non-reloading transporta-tion over the entire length of the shaft, reducing the additional degra-dation of transported coal due to the exclusion of reloading points, minimizing costs through the use of less durable belts, minimizing costs of sinking an inclined shaft of a smaller cross-section.
Highlights
The task arose due to the planned increase in the mine output from 6.5 to 13.6 million tons per year
The increase in the mine performance is associated with an increase in the daily output to 38,000 tons, which in turn requires the re-equipment of conveyor transport in the inclined shaft
When choosing the optimal conveyors for transporting material over long distances, the determining factors are reliability, capital and operating costs, which are determined by such technical characteristics as belt width, strength and speed [2, 3]
Summary
The task arose due to the planned increase in the mine output from 6.5 to 13.6 million tons per year. Comparison of the operating conveyor load with the peak conveyor performance, which is determined by the conveyor capacity, allows making the choice of parameters such as the belt width and speed (Table 1). During the reconstruction of transport, it is tempting to minimize costs: without increasing the belt width and without increasing the cross-section of the mine, increase the conveyor performance by increasing the speed to 6.3 m/s.
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