10.57647/ijeee.2025.1603.13

Synergistic Analysis of Adsorption-Desorption Characteristics Based on Pressure-Desorption Capacity: A Case Study of Xiaohuigou Coal Mine in China

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  • Yongming Zou1,2,
  • Yaolin Cao1,2,3,
  • Jie Kang3,
  • Yuntao Liang1,3,
  • Congna Hao4,
  • Linlin Ding5,
  • Fuchao Tian*1,2,3,
  1. China Coal Research Institute Fushun Branch, Shenfu Demonstration Zone, Liaoning, China
  2. State Key Laboratory of Coal Mine Disaster Prevention and Control, China Coal Technology and Engineering Group Shenyang Research Institute, Shenfu Demonstration Zone 113122, China
  3. Liaoning Technical University, School of Safety Science and Engineering, Huludao, Liaoning 125100, China
  4. Shenyang Urban Construction University, School of Architecture and Planning, Shenyang, Liaoning 110167, China
  5. Liaoning University, School of Information, Shenyang, Liaoning 110136, China

Received: 2025-09-07

Accepted: 2025-11-26

Published in Issue 2025-12-31

Copyright (c) 2025 Yongming Zou, aolin Cao, Jie Kang, Yuntao Liang, Congna Hao, Linlin Ding, Fuchao Tian (Author)

Creative Commons License

This work is licensed under a Creative Commons Attribution 4.0 International License.

How to Cite

Zou, Y., Cao, Y., Kang, J., Liang, Y., Hao, C., Ding, L., & Tian, F. (2025). Synergistic Analysis of Adsorption-Desorption Characteristics Based on Pressure-Desorption Capacity: A Case Study of Xiaohuigou Coal Mine in China. International Journal of Energy and Environmental Engineering, 16(04). https://doi.org/10.57647/ijeee.2025.1603.13
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Abstract

To thoroughly reveal the intrinsic relationships among coal gas adsorption-desorption characteristics, coal structure, and oxidation activity under deep high-temperature and high-pressure conditions, and optimize gas extraction schemes for high-gas mines, we performed a study. Coal samples from the 2201 mining face of No.2 coal seam in Xiaohuigou Coal Mine, China, were selected as the research object. A series of tests were systematically conducted under experimental temperature: 30-120℃, pressure: 0.5-2.5MPa, including proximate analysis, ultimate analysis, adsorption-desorption experiments, thermogravimetric analysis (TG), and Brunauer-Emmett-Teller (BET) pore structure test. The regulatory mechanism of coal gas adsorption and desorption under the coupling effect of temperature and pressure was clarified. The response mechanism between the pore structure of coal samples and their pyrolysis characteristics was determined. An optimization method for gas extraction parameters based on "synergistic regulation of pressure and desorption capacity" was established. This technology was successfully applied to the gas control scenario of the 2201 working face. After applying this technology, the average gas concentration at the upper corner of the working face decreased to 0.40%, with the maximum concentration controlled below 0.67%. The width of the goaf oxidation zone was reduced from the original 40-50 m to 25-30 m. The pure gas extraction flow rate per borehole reached 3.77 m3/min, equivalent to the extraction effect of 580 Φ113 mm reverse drilling holes. The cumulative pure gas extraction volume reached 7.01×105 m³, which effectively guarantees the safe production during the high-intensity mining of the working face.

Keywords

  • Adsorption pressure,
  • Gas desorption,
  • Thermogravimetric analysis (TG),
  • Pore structure analysis,
  • Gas extraction
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