Authors: N.G. Afendikov, S.V. Tyrtychny

Title of the article: Experimental research of rock destruction by a group of cutters with different their displacements along the cutting lines

Year: 2025, Issue: 2, Pages: 40-49

Branch of knowledge: 2.8.8. Geotechnology, Mining machines (engineering)

Index UDK: 622.223.83

DOI: 10.26730/1816-4528-2025-2-40-49

Abstract: The research is devoted to the analysis of rock destruction by a group of cutters with their different displacements along the cutting line. It becomes especially relevant due to the greater practicability of using selective coal mining in thin and very thin seams compared to other modern mining methods. At the moment the technology of mining by cutting off side rock is mainly used. However, its application is marked by a number of defects, such as coal ash content, which leads to considerable economic losses. Application of selective mining of coal in thin and very thin seams needs research and development of the design of the executive bodies of shearers for selective mining. The main purpose of the research is to reveal the degree of influence of the stress state of the massif of the destroyed rock, created by one group of cutters of the drum shearer's executive body, on the stress state of the massif, created by another group of cutters at different schemes of face destruction and at different cutting modes. The research includes the description of the designed stand created on the basis of a planer to study the destruction with different cutting parameters of clayey and sandy shale rocks by groups of three cutters and at different displacements of cutters along the cutting lines in the groups, as well as the establishment of the influence of the mutual location of cutters of the bottom-hole group on the drum shearer's executive bodies. The results of measurements of cutting force components with radial and tangential rotary cutters, with different thicknesses and widths of cut and with different displacements of cutters in the group during destruction of clayey and sandy shale rocks were presented. The research makes an important contribution to the development of selective method of coal mining in thin and very thin seams.

Key words: stand destruction group of cutters cutting parameters cutter displacement registration cutting force components

Receiving date: 18.11.2024

Approval date: 01.03.2025

Publication date: 05.06.2025

CITE DOWNLOAD