Authors: V.F. Kolesnikov

Title of the article: Research and development of technology of multitier dumps formation by motor transport in open pit mines

Year: 2023, Issue: 1, Pages: 40-70

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

Index UDK: 622.271.3

DOI: 10.26730/2618-7434-2023-1-40-70

Abstract: Dumping is one of the final processes of open-pit coal mining, the efficiency of which to a large extent depends on the reliability of the entire technological chain of the open pit. Currently, the majority of open pit mines in Kuzbass have single-level external bulldozer dumps up to 40 m high. As a result, the area of land disturbed by external dumps is about 40% of all areas disturbed in open-pit coal mining. The small height of Bulldozer dumps with motor transport is caused both by their stability and by the growth of operational costs on the transport component (increase in the length of transportation, fuel consumption, wear and tear of the dump truck, etc.). Reduction of these factors influence is possible at dumping multi-tier dumps formed by bulldozer-excavator complexes, and excavators which are a part of the complex should have an opportunity of bottom-digging (below the level of their position). In this case when backfilling the upper layers there is no need for dump trucks to reach them. Backfilling of rocks with their transportation by dump trucks is made only on the first bottom (base) tier by bulldozer. The excess volume of rocks from the first (base) tier is re-excavated to the overlying tiers by dragline excavators. This paper proposes the technology of external bulldozer-excavator multi-tier dumping in different conditions and substantiates the parameters of the dumps. Also, their effectiveness is evaluated by the criteria of specific land-use intensity of dumping.

Key words: dumping hydraulic dump open-pit mining multi-tier dump motor transport excavator and bulldozer complex

Receiving date: 10.01.2023

Approval date: 13.03.2023

Publication date: 26.04.2023

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