Computer modeling-based substantiation of effective application conditions for inclined rope hoists in open pit mines

In open pit mineral mining at reduced cutback, it is possible to use rope hoists with high-capacity containers, which in general can be called the inclined rope hoisting units (IRHU). The containers can be car platforms that lift dump trucks to ground surface along the shortest path, or skips. The article presents the comparison results on technical and economic indices of elevating platforms and skip hoists. The IRHU operation in the haulage chain is backed-up with the truck-and-shovel system. The multivariate calculations are carried out for varied mining conditions (open pit depth, IRHU height, annual productivity, load-carrying capacity of dump trucks and skips, lifespans of hoist units). The calculations show that, despite the significant reduction in operating costs, the overall economic effect from the use of IRHU is not so great due to the high investments required. The best economic performance belongs to the variants of increased load-carrying load capacity and annual productivity. The truck hoist units have a minimum cost-effective area of application in the considered design. The skip hoists are more efficient and can be used in modern open pits. The actual use of IRHU needs novel configurations and designs to be developed to provide reduction in capital costs and in construction period, as well as to ensure IRHU elongation for deep open pits. The plots are presented to illustrate expansion of the cost-effective application range of IRHU as function of capital costs. The lines of further intensification and diversification of IRHU use are formulated.

Keywords: inclined rope hoisting unit for open pits, truck hoist, skip hoist, technical and economic indicators of transport.
For citation:

Zhuravlev A. G., Chendyrev M. A. Computer modeling-based substantiation of effective application conditions for inclined rope hoists in open pit mines. MIAB. Mining Inf. Anal. Bull. 2021;(5—2):309—321. [In Russ]. DOI: 10.25018/0236_1493_2021_52_0_309.

Acknowledgements:

The studies were carried out in the framework of State Contract No. 07500581-19-00, Topic No. 0405-2019-0005.

Issue number: 5
Year: 2021
Page number: 309-321
ISBN: 0236-1493
UDK: 622.68: 622.678
DOI: 10.25018/0236_1493_2021_52_0_309
Article receipt date: 13.01.2021
Date of review receipt: 29.03.2021
Date of the editorial board′s decision on the article′s publishing: 10.04.2021
About authors:

Zhuravlev A. G., chief of laboratory, Cand. Sci. (Eng.), juravlev@igduran.ru;
Chendyrev M. A., Junior resercher, Institute of mining, chendyrev@igduran.ru;
1 Institute of mining Ural branch Russian academy of sciences, Ekaterinburg, Russia.

 

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