THERMAL SCIENCE

International Scientific Journal

Xiang-He Gao

,

Feng Gao

,

Ning Zhang

,

Yue Niu

,

Kai-Feng Ren

,

Zheng-Min Yang

SIMULATION STUDY ON STRESS-SEEPAGE COUPLING OF COAL

ABSTRACT
Mining significantly affects the mechanical properties and structure of coal seams and increases the risk of disasters such as coal and gas outburst. Gas extraction is the key technology of disaster prevention and resource utilization. In this study, a damage elastoplastic constitutive model was developed, and the stress-strain change of rock was simulated by finite element program. Through the simulation of drilling gas extraction, it is found that the gas pressure increases with the increase of the distance from the center of the borehole, and the pressure drop decreases. These findings have practical significance for the prevention and control of gas disasters.
KEYWORDS
stress-seepage coupling, numerical simulation, gas, coal, pore-fracture model
PAPER SUBMITTED: 2024-08-03
PAPER REVISED: 2024-11-18
PAPER ACCEPTED: 2024-11-27
PUBLISHED ONLINE: 2025-06-01
DOI REFERENCE: https://doi.org/10.2298/TSCI2502411G
CITATION EXPORT: view in browser or download as text file
THERMAL SCIENCE YEAR 2025, VOLUME 29, ISSUE Issue 2, PAGES [1411 - 1416]
REFERENCES
  1. Miao, X. X., and Qian, M. G., Research on Green Mining of Coal Resources in China: Current Status and Future Prospects, Journal of Mining and Safety Engineering, 26 (2009), 01, pp. 1-14
  2. You, Q., et al., Experimental Study on Spontaneous Imbibition of Recycled Fracturing Flow-Back Fluid to Enhance Oil Recovery in Low Permeability Sandstone Reservoirs, Journal of Petroleum Science & Engineering, 166 (2018), July, pp. 375-380
  3. Sander, R., et al., Laboratory Measurement of Low Permeability Unconventional Gas Reservoir Rocks: A Review of Experimental Methods, Journal of Natural Gas Science and Engineering, 37 (2017), Jan., pp. 248-279
  4. Heller, R., et al., Experimental Investigation of Matrix Permeability of Gas Shales, AAPG Bulletin, 98 (2014), 5, pp. 975-995
  5. Wang, J. X., Jiang, A. N., An Elastoplastic Damage Constitutive Model of Rock and Its Application Tunnel Engineering, Rock and Soil Mechanics, 36 (2015), 4, pp. 1147-1158
  6. Zhang, N., et al., A Mechanistic Model for Porosity and Permeability in Deformable Hydrate-Bearing Sediments with Various Hydrate Growth Patterns, Acta Geotechnica, 19 (2024), 2, pp. 855-880
  7. Zhang, L. P., Mechanism of Coupled Thermal-Hydrologic-Mechanical Processes for Exploiting Coal Bed Methane in Low Permeability Reservoir and its Applications, Ph. D. thesis, China University of Mining & Technology, Xuzhou, China, 2011
  8. Shan, E., Wu, W. Z., The B8 Coal Seam Gas Determination Basic Parameters and the Distribution Rule Research in Xinzhuangzi Coal Mine, Coal, 24 (2015), 06, pp. 10-13+51+58
  9. Yu, T., et al., Measurement of Effective Drainage Radius Based on Gas-flow and Pressure of Boreholes, Journal of Mining & Safety Engineering, 29 (2012), 04, pp. 596-600
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Simulation study on stress-seepage coupling of coal

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