Engineering Mechanics

Proceedings Vol. 31 (2025)

ENGINEERING MECHANICS 2025

Copyright © 2025 Institute of Theoretical and Applied Mechanics of the Czech Academy of Sciences, Prague

 

Pavlenko M. V.
pages 157 - 160, full text

Vibration exposure is an environmentally friendly and effective method in the technology of increasing the permeability of a gaseous coal mass, which takes into account the resonance in the coal seam when vibrating waves are excited, which in turn helps stimulate the formation of pores and cracks in coals using waves of vibrations generated by low-frequency vibration. In order to study the effect of the vibration frequency and its resonant effect on increasing the fracturing of the coal seam, as well as to study the mechanisms underlying the increase in coal permeability using this method, the final methane output from the coal massif was evaluated as part of the research. During vibration action on a coal massif, the mechanism of cracking and methane release from coal was evaluated using a theoretical review, laboratory experiment and field tests. Research shows that a vibration wave can increase tension in some areas and decrease it in others. In addition to the effect of stress waves in the coal during vibration, it can be argued that this leads to the fact that even a small pulsating pressure creates a better cracking effect in the formation than with conventional static exposure. Assumptions are made about the influence of vibration vibrations occurring at the contact of the vibration emitter with the coal seam, namely, a simple explanation is proposed for the often-observed effect of increased cracking from the frequency of vibration on the gaseous coal mass. the use of vibrators in various designs is not only one of the most effective tools for vibration effects on coal, but due to a number of fundamental advantages over other sources of exposure, they are increasingly being used as a scientific research tool.

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