THERMAL SCIENCE

International Scientific Journal

Authors of this Paper

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Fei Liu

,

Guang-Heng Ge

,

Peng Gong

,

Xin-Lei Fu

DEFORMATION AND HEAT TRANSFER MODELFOR SURROUNDING ROCK IN THICK LOOSE LAYER-EXTRA THICK COAL SEAM WORKING FACE

ABSTRACT
By using theoretical analysis and numerical calculation, the mechanical properties of the surrounding rock of the thick loose layer and extra thick coal seam comprehensive discharge face were deeply studied. The multi-parameter critical control equation for the sudden change of the roof plate along the working face was derived, and the influence of variables such as fracture block degree, rotation angle, breaking angle, friction factor and corner end extrusion coefficient on the stability of the roof “rotation-slide” was obtained. A heat transfer model for the broken layers under the underground ventilation is proposed. This study has great significance for the safe mining and high yield and efficiency of the mine.
KEYWORDS
instability criterion, heat transfer model, thick loose seam, extra thick coal seam
PAPER SUBMITTED: 2024-08-20
PAPER REVISED: 2024-09-25
PAPER ACCEPTED: 2024-10-10
PUBLISHED ONLINE: 2025-05-03
DOI REFERENCE: https://doi.org/10.2298/TSCI2502095L
CITATION EXPORT: view in browser or download as text file
THERMAL SCIENCE YEAR 2025, VOLUME 29, ISSUE Issue 2, PAGES [1095 - 1100]
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Deformation and heat transfer modelfor surrounding rock in thick loose layer-extra thick coal seam working face

2025 Society of Thermal Engineers of Serbia. Published by the Vinča Institute of Nuclear Sciences, National Institute of the Republic of Serbia, Belgrade, Serbia. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution-NonCommercial-NoDerivs 4.0 International licence