Methane Release from the Soil as a Factor of the Formation of Local Accumulations in Treatment Faces of Coal Mines


For citation.
Kaledina N.O., Meshcheryakov D.A., Malashkina V.A. Methane Release from the Soil as a Factor of the Formation of Local Accumulations in Treatment Faces of Coal Mines. Bezopasnost Truda v Promyshlennosti = Occupational Safety in Industry. — 2026. — № 2. — рр. 29-36. (In Russ.). DOI: 10.24000/0409-2961-2026-2-29-36


Annotation:

The study describes the circumstances of several accidents involving methane release from the soil of treatment faces. It has been substantiated that attempts to present this source as a new phenomenon not previously studied are not valid, as methane accumulations released from the soil are well-known processes in the formation of local gas accumulations in stagnant areas. In this case, the area is a structurally restricted space under an armored face conveyor, and it corresponds to the area of potential spark formation during the operation of the mining machine and face conveyor in the longwall. The generally adopted method for preventing and eliminating local accumulations is to locally increase the airflow velocity in potentially hazardous sections, and this is the measure adopted by designers of modern mechanized complexes. Using this method in several Russian mines proved efficient. The issue raised in the mining community regarding the measurement of methane release volume from the source in question is not relevant, given the nature of methane desorption from coal seams. The study describes the patterns of methane release into mine workings that conditioned the specifics of gas flow measurement in order to evaluate the gas balance of mining areas and methane concentrations to verify their compliance with the established standards (of maximum permissible concentration). 

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DOI: 10.24000/0409-2961-2026-2-29-36
Year: 2026
Issue num: February
Keywords : coal mine methane regulatory framework газовый баланс friction local accumulations heat impulse source definition of gas abundance measurements of ventilation parameters
Authors: