Authors: E.V. Makridin, S.M. Miliy, A.B. Efremenkov, A.S. Yakovlev, S.O. Markov, M.A. Tyulenev

Title of the article: Research of coal extraction technology using draglines in transversal mining systems for inclined and steep seams

Year: 2025, Issue: 4, Pages: 88-106

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

Index UDK: 622.822.22

DOI: 10.26730/2618-7434-2025-4-88-106

Abstract: The general technical policy of coal producers is consistently directed toward increasing the volume of transportless overburden removal by expanding its boundaries and scope of application. It is proposed to develop part of the overburden in inclined deposits and upper horizons of steep seams, to make wider use of explosive rock disposal in the dump layer, to use high benches and paired excavator operation. The use of transportless technology in the mining of inclined and steep deposits with transverse development of the working front is in line with the technical and economic policy of coal producers. In addition, it is necessary to strive to expand the boundaries of application of this technology in a new area, in particular, to increase the capacity of the overburden being mined (the height of the transportless or working zone). However, it should be noted that there may be situations in which mining operations also have to be carried out using a dragline, including when mining inclined and steep seams. This article examines the conditions for selective and selective-bulk mining of inclined and steep seams using a dragline, studies the sequence of digging operations, and identifies the most and least favorable mining and geological conditions for developing coal seams using a dragline.

Key words: open pit mining dragline mining system bulk excavation selective excavation transportless technology coal losses

Receiving date: 15.08.2025

Approval date: 17.11.2025

Publication date: 23.12.2025

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