THERMAL SCIENCE

International Scientific Journal

DEWATERING STRESS ADJUSTMENT AND EFFECT ON MINING PRESSURE IN DEEP SANDSTONE ROOF

ABSTRACT
To explore the coupling relationship between stress field adjustment and mining pressure in the sandstone roof at great depth under dewatering conditions, a mechanical linkage mathematical model based on elastic theory was constructed to estimate the stress adjustment in the dewatering area and its interaction with mining pressure. Additionally, the Sobol global sensitivity analysis method was introduced to evaluate the importance and interaction of various factors affecting the stress adjustment in the roof area. The study found that the main factors influencing the vertical stress at point M, in order of significance, are the horizontal distance from point M to the dewatering outlet, the pressure head of the aquifer at the dewatering outlet, the permeability coefficient of the dewatering stratum, and the influence coefficient of dewatering; among these, a significant interaction exists between the horizontal distance from point M to the dewatering outlet and the pressure head of the aquifer at the dewatering outlet, while interactions among other parameters are less significant or negligible.
KEYWORDS
PAPER SUBMITTED: 2024-07-16
PAPER REVISED: 2024-10-05
PAPER ACCEPTED: 2024-11-23
PUBLISHED ONLINE: 2025-05-03
DOI REFERENCE: https://doi.org/10.2298/TSCI2502137Y
CITATION EXPORT: view in browser or download as text file
THERMAL SCIENCE YEAR 2025, VOLUME 29, ISSUE Issue 2, PAGES [1137 - 1143]
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2025 Society of Thermal Engineers of Serbia. Published by the VinĨa 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