Authors: P.V. Cherkasov, A.N. Starodubov

Title of the article: Approaches to excessively released rock mass determination in longwall top coal caving technology

Year: 2025, Issue: 3, Pages: 139-147

Branch of knowledge: 2.8.8 Geotechnology, mining machines

Index UDK: 622 + 004.942

DOI: 10.26730/1999-4125-2025-3-139-147

Abstract: Due to the exhaustion of easily accessible coal seam deposits, the urgency of developing hard-to-recover reserves from thick seams is increasing. To increase the efficiency of underground mining, promising technologies are used with longwall top coal caving in areal or wave modes. The work is devoted to the study of the releasing rock mass process and substantiating the support sections elements parameters of the mechanized complex on the developed simulation model. The object of the study was the process of loading rock mass with a feeder onto a downhole conveyor. The need to ensure that the conveyor works at full capacity without overloading, in the absence of conducting field experiments possibility, determines the use of computer modeling to study the release process parameters. The paper presents the simulation model elements main parameters. In addition, the adequacy of the selected parameters was confirmed by a series of field experiments aimed at determining the angle of the natural slope of coal. As a result of the statistical data collection on the mass of particles on the conveyor, as well as the excessively released mass, dependences for various design parameters of the section elements were obtained. Approaches to the assessment of excessively released rock mass on the conveyor are also proposed to prevent its overflow and the occurrence of increased dynamic loads. Thus, the task of determining a rational option for coordinating the operating modes of sections has been formalized. The rational parameters of the release mode on the obtained model as a result of research and the virtual display of the extraction process can be elements of the software implementation of the digital twin of a robotic treatment complex with controlled release.

Key words: simulation modeling rock mass release operation high coal releasing discrete element method user process excessively released mass angle of the natural slope

Receiving date: 12.02.2025

Approval date: 10.06.2025

Publication date: 26.06.2025

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