THERMAL SCIENCE

International Scientific Journal

Authors of this Paper

External Links

Fei Teng

,

Minggao Yu

,

Jiangkun Chao

,

Zhihui Ma

COAL PILLAR'S BREAKING AND FRACTURE DEVELOPMENT MECHANISM AND NUMERICAL SIMULATION

ABSTRACT
This study explores the influence of a repeated mining process on an upper coal pillar in a close coal seam group. The pillar's breaking and instability processes are emphasized, and the influence of fracture development on the oxidation and spontaneous combustion of coal pillars is revealed. A numerical simulation is used to simulate the dynamic evolution characteristics of stress, displacement of the upper coal pillar, and the numerical results elucidate that the mining of the lower adjacent coal seam is a pressure relief process for the upper coal pillar. The theoretical length of the fracture along the strike of the upper coal pillar is also obtained for the upper coal pillar.
KEYWORDS
fracture development of coal pillar, close seam group, oxidation and spontaneous combustion of coal pillar, repeated mining
PAPER SUBMITTED: 2020-05-01
PAPER REVISED: 2021-10-04
PAPER ACCEPTED: 2021-10-04
PUBLISHED ONLINE: 2022-07-16
DOI REFERENCE: https://doi.org/10.2298/TSCI2203439T
CITATION EXPORT: view in browser or download as text file
THERMAL SCIENCE YEAR 2022, VOLUME 26, ISSUE Issue 3, PAGES [2439 - 2446]
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Coal pillar's breaking and fracture development mechanism and numerical simulation

© 2024 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