THERMAL SCIENCE

International Scientific Journal

Zhi-Peng Wang

,

Jie Song

,

Geng-Xin Yang

,

Zhong-Ping Zhu

,

Zhang Xu

,

Zhao Liu

,

Bing Ji

,

Ming-Zhong Gao

STUDY ON THE OPTIMIZATION OF THE IN-SITU GAS PRESSURE CALCULATION METHOD FOR COAL SAMPLES CONTAINING WATER

ABSTRACT
To improve the accuracy of in-situ gas pressure measurement in coal seams, the calculation method for gas pressure in water-bearing, pressure-maintained coal samples was optimized. The method's reliability was verified by comparing calculation errors before and after optimization. Results indicate that incorporating the adsorption capacity attenuation coefficient, λ, and coal sample moisture content (ω) into the calculation improved stability and reliability. The average error decreased significantly from 15.79% -1.38%. This optimized method offers a reliable and convenient approach for accurately measuring in-situ gas pressure in water-bearing coal seams while maintaining high calculation accuracy.
KEYWORDS
gas pressure calculation, pressure-retaining coring, water-bearing coal samples
PAPER SUBMITTED: 2024-09-10
PAPER REVISED: 2024-11-20
PAPER ACCEPTED: 2024-11-25
PUBLISHED ONLINE: 2025-06-01
DOI REFERENCE: https://doi.org/10.2298/TSCI2502435W
CITATION EXPORT: view in browser or download as text file
THERMAL SCIENCE YEAR 2025, VOLUME 29, ISSUE Issue 2, PAGES [1435 - 1441]
REFERENCES
  1. Gao, Y. N., et al., Does Double Pre-Notches Have a Greater Impact than Single Pre-Notch on the Mechanical and Fracture Behavior of Rock, Insights from Three-Point Bending Tests Using the Numerical Approach of Grain-Based Model, Theoretical and Applied Fracture Mechanics, 133 (2024), 2, ID104624
  2. Miao, X. X., et al., Coupled Thermodynamic and Thermomechanical Modelling for Compressed Air Energy Storage in Underground Mine Tunnels, International Journal of Rock Mechanics and Mining Sciences, 176 (2024), 2, ID105717
  3. Gao, Y. A., et al., The Novel Strength Criterion and the Associated Constitutive Model Based on the Finite Deformation Behavior for the Rock under the Disturbance Stress Paths, Geomechanics for Energy and the Environment, 34 (2023), 3, ID100456
  4. Gao, Y. N., et al., The Strata Movement and Ground Pressure Under Disturbances from Extra Thick Coal Seam Mining: A Case Study of a Coal Mine in China, Geomechanics and Geophysics for Geo-Energy and Geo-Resources, 8 (2022), 3, ID199
  5. An, F., et al., Determination of Coal Gas Pressure Based on Characteristics of Gas Desorption, Journal of Mining and Safety Engineering, 28 (2011), 1, pp. 81-89
  6. Gao, M.-Z., et al., Principle and Technology of Coring with In-Situ Pressure and Gas Maintaining in Deep Coal Mine, Journal of China Coal Society, 46 (2021), 3, pp. 885-897
  7. Si, L., et al., Dissolution Characteristics of Gas in Mine Water and Its Application on Gas Pressure Measurement of Water-Intrusion Coal Seam, Fuel, 313 (2022), 2, ID123004
  8. Xie, H., et al., Study on Concept and Progress of In Situ Fidelity Coring of Deep Rocks, Chinese Journal of Rock Mechanics and Engineering, 39 (2020), 5, pp. 865-876
  9. Cui, P., et al., A Preliminary Study of Pressure-Preserved Coring Calculation Principle and Method for In-Situ Pressure in Deep Coal Seams, Coal Geology & Exploration, 51 (2023), 8, pp. 59-67
  10. Heping, X., et al., Research Advances on the in-Situ Pressure-Preserved Coring and Gas Parameter Determination for Deep Coal Seams, Coal Geology & Exploration, 51 (2023), 8, pp. 1-12
  11. Chen, D., et al., Modelling and Simulation of Moisture Effect on Gas Storage and Transport in Coal Seams, Energy & Fuels, 26 (2012), 3, pp. 1695-1706
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Study on the optimization of the in-situ gas pressure calculation method for coal samples containing water

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