THERMAL SCIENCE

International Scientific Journal

Ming-Zhong Gao

,

Yong-Cheng Li

,

Jie Song

,

Peng-Fei Cui

,

Zong-Xin Hao

IN-SITU GAS PRESSURE CALCULATION PRINCIPLE OF PRESSURE-MAINTAINING COAL SAMPLES AND EXPERIMENTAL VERIFICATION IN DEEP COAL SEAMS

ABSTRACT
Accurate determination of in-situ gas pressure in deep coal seams is the basic guarantee for safe production in coal mines, therefore, this paper is based on the in-situ pressure maintaining coring technology of deep coal seams, the gas pressure equilibrium process of pressure maintaining coal cores was simulated by carrying out decompression desorption experiments to validate the principle of in-situ gas pressure calculation for pressure maintaining coal samples of deep coal seams. The results of the study show that the theoretical values of in-situ gas pressure are in good agreement with the experimental values. The mean deviation is 0.126 MPa, 0.194 MPa, respectively, the average error is 5.085% and 8.319%, respectively. The experiments of desorption of pressure maintaining coal samples verified the reliability of the in-situ gas pressure calculation principle.
KEYWORDS
deep coal seam, in-situ gas pressure, decompression desorption
PAPER SUBMITTED: 2024-07-12
PAPER REVISED: 2024-10-08
PAPER ACCEPTED: 2024-11-21
PUBLISHED ONLINE: 2025-05-03
DOI REFERENCE: https://doi.org/10.2298/TSCI2502159G
CITATION EXPORT: view in browser or download as text file
THERMAL SCIENCE YEAR 2025, VOLUME 29, ISSUE Issue 2, PAGES [1159 - 1165]
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In-situ gas pressure calculation principle of pressure-maintaining coal samples and experimental verification in deep coal seams

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