Authors: G.P. Starikov, T.N. Melnik, I.G. Starikova, A.A. Podrukhin

Title of the article: Calculation and experimental assessment of the depth of the extraction zone in coal seams taking into account their gas content

Year: 2025, Issue: 6, Pages: 75-83

Branch of knowledge: 2.8.6. Geomechanics, destruction of rocks by explosion, mine aerogasdynamics and mining thermophysics

Index UDK: 622.2

DOI: 10.26730/1999-4125-2025-6-75-83

Abstract: During mining operations, intensive processes of redistribution of mechanical stresses, gas release, deformation and destruction occur in the bearing pressure zone. The number of emergencies related to emissions and rock falls exceeds the number of those initiated by roof subsidence. To predict inrushes and other dangerous situations, a theoretical analysis of the dependence of the depth of the extraction zone on the mechanical, gas-dynamic and strength characteristics of the coal seam and the host rocks was carried out using adapted models of the stress state of the rocks surrounding the mine. A numerical calculation of the depth of the pressing zone (the unloading zone and the distance from the bottom to the maximum bearing pressure point) has been performed for the working conditions of the h6' – Smolyaninovsky bed of the A.A. Skochinsky mine. The analysis of the relationship between the parameters of the bearing pressure zone and the gas emission mode in the face is carried out. The dependence of the initial rate of gas release from the drilled hole on the pressure in the extraction zone and the time elapsed since the work was carried out is obtained. A theoretical estimate of the time when it will be safe to carry out the next stage of excavation is given, namely, when the gas release will be at a safe level. The calculation results are confirmed by the actual parameters of the mining regime in the formation. A change in the gas emission mode in one direction or another may be an evidence of a violation of the equilibrium and stability of the surrounding rocks, and monitoring of gas emissions in practice provides important information about the safety of excavation. The intensity of gas emission due to the processes taking place in the support zone is an indirect criterion for assessing the strength properties of the massif and its structure.

Key words: rock-fracture zone bearing pressure gas release inrush outburst hazard

Receiving date: 18.06.2025

Approval date: 15.11.2025

Publication date: 22.12.2025

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