THERMAL SCIENCE

International Scientific Journal

Yong-Sheng Han

,

Xiang-Yu Xu

,

Cheng-Zhi Li

OVERBURDEN EVOLUTION PATTERNS IN LONGWALL, STRIP, AND ROOM-AND-PILLAR GOAFS

ABSTRACT
Coal mining has resulted in the coexistence of longwall, strip, and room-and-pillar goafs, which exhibit long-term, concealed, and overlapping deformation characteristics. Under coal pillar deterioration and long-term creep, the risk of overburden instability increases, threatening the safety of infrastructure in mining areas. In this study, a numerical model of overburden migration was developed to investigate the deformation and stress distribution of overburden in typical goafs. The results reveal the influence of different mining methods on overburden failure behavior and surface subsidence.
KEYWORDS
goaf, Coal pillars, Surface subsidence, Overburden deformation
PAPER SUBMITTED: 2025-07-12
PAPER REVISED: 2025-10-13
PAPER ACCEPTED: 2025-12-30
PUBLISHED ONLINE: 2026-07-25
DOI REFERENCE: https://doi.org/10.2298/TSCI250712151H
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Overburden evolution patterns in longwall, strip, and room-and-pillar goafs

© 2026 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 4.0 International licence