Authors: V.M. Yurchenko

Title of the article: Reconstruction of conveyor transport in the inclined shaft of the "Raspadskaya» mine

Year: 2020, Issue: 1, Pages: 23-29

Branch of knowledge: 05.05.06 Mining machines

Index UDK: 622.64-212.3

DOI: 10.26730/1816-4528-2020-1-23-29

Abstract: Vehicle selection criteria work well when a mining enterprise’s demand is met by a line of mass-produced conveyors.
In the case of reconstruction of an enterprise in order to increase production capacity, it is necessary to formulate the terms of reference for the development of transport vehicles with new technical characteristics: productivity, total drive power, belt width, its speed, transportation length.
Possible approaches to providing the eastern inclined shaft of the Raspadskaya mine with conveyor transport are considered in the article. The shaft length is 4100 m, the reduced angle of inclination is +7°40´.
The first thing to decide under any approach is the conveyor’s unloading capacity, which is determined by the speed of movement and the width of the belt. An increase in the unloading capacity to the required value of 46.9 m/min is achieved by increasing the width of the belt or increasing the speed. It should be borne in mind that an increase in the width of the belt requires an increase in the cross section of the shaft, therefore, leads to its cost increase. At the same time, increasing the speed of the belt reduces the life of the supporting rollers, increasing the operating costs of the conveyor. For further discussion, the following parameters are adopted: belt width - 1400 mm, belt speed - 4.0 m/s.
In the first approach, an attempt was made to install one belt conveyor with triple-drum drive along the entire length of the eastern inclined shaft. Traction calculations showed the impossibility of producing such a conveyor belt for the following reasons. The total drive power is 10520 kW, which requires a drive station with a one-sided arrangement of drive units with a power of 4000 kW to implement a triple-drum scheme. The maximum strength of the St-8500 belts produced by leading world manufacturers is not enough to transmit the necessary traction.
The second option provides for the installation of three belt conveyors. Based on the analysis of the actual profile of the lying wall of the eastern inclined shaft, it is rational to install three conveyors: “upper” (length is 1320 m, angle is +10°54´), “medium” (length is 1365 m, angle is +3°42´) and “lower” (length is 1365 m, angle is +7°24´). This approach will allow the use of less durable belts: on the “upper” - rubber cable St-6300, on the “middle” – mono-spacer PVG-2500 belt, on the “lower” - mono-spacer PVG-4000 belt.
A significant drawback of this option is the appearance of two additional overloads with concomitant disad-vantages: cargo crushing and dust formation, additional belt wear.
According to the third option, it is proposed to install a conveyor belt with four intermediate drives “belt – belt” for the entire length of the eastern inclined shaft. This approach allows ensuring non-reloading transportation with all the positive consequences, reducing financial costs due to the possibility of using less durable conveyor belts: mono-spacer PVG-4000 as a load belt, and mono-spacer PVG-1400 as a drive belt.

Key words: belt conveyor average and maximum one-minute traffic flows unloading capacity conveyor operation load drive power intermediate drive the strength of the conveyor belt

Receiving date: 13.02.2020

Publication date: 14.06.2020

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