Authors: D.M. Dubinkin, S.O. Markov, A.A. Khoreshok, S.Y. Ismailova

Title of the article: Study of the influence of the bench height change on the current stripping ratio when using autonomous quarry dump trucks with payload capacity of 240 tons

Year: 2023, Issue: 3, Pages: 71-81

Branch of knowledge: 2.8.8 Mining machines, geotechnology (engineering)

Index UDK: 622.271.324+622.271.332

DOI: 10.26730/2618-7434-2023-3-71-81

Abstract: The current stripping ratio has a significant impact on the cost of coal in the process of open pit coal mining. Its value depends on the parameters of mining and transportation equipment and technological schemes of rock mass excavation. Different types of excavators can be used when working with dump trucks with payload capacity of 220 and 240 tons. Earlier studies have shown that the optimum is the use of high-capacity excavators – hydraulic backhoes with dump trucks loading below the level of excavator standing. At the same time, there was no study of the influence of the bench height on the cost indicators (current stripping ratio). The use of dead-end dump trucks feeding scheme with their lower loading increases the productivity of excavator-automobile complex at reducing the width of disintegration of broken rock to the width of the area for dump trucks turning. At the same time there is a reserve for increasing the height of benches, because the increasing height of disintegration of broken rock does not have a special impact on the work of excavators used when working with dump trucks of such payload capacity. This paper presents a methodology for quantitative assessment of the influence of the bench height on the current stripping ratio: the problem formulation is considered, numerical dependencies are established, and appropriate recommendations are given.

Key words: stripping ratio hydraulic backhoe quarry dump truck working area width bench height autonomous heavy platform

Receiving date: 15.08.2023

Approval date: 31.10.2023

Publication date: 29.11.2023

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