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Peer-reviewedCC BY-NC-ND 4.0ACS Omega

Characteristics and Physical–Environmental Coupling Evolution Model of Immediate On-Site Gas Desorption from Coal during Postmining Activities

  • Hong Ding1,2
  • Qingming Long1,2
  1. 1State Key Laboratory of Coal Mine Disaster Prevention and Control , ,
  2. 2Chongqing Research Institute Co. Ltd., China Coal Technology and Engineering Group , , ,
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Abstract

Methane emissions from postmining activities originate from gas dissipation during transport and storage. This study investigates the immediate desorption characteristics and evolution laws of postmining coal through long-term tests on coarse particles and isothermal tests on fine particles under varying parameters. Results show a two-stage desorption process: a rapid linear growth stage posthoisting but before transport and processing, followed by a gradual decline and stabilization. The desorption volume exhibits a two-stage trend with coal rank, fluctuating from low- to high-metamorphic bituminous coal and increasing linearly from high-metamorphic bituminous coal to anthracite. Elevated ambient temperatures and smaller particle sizes significantly accelerate desorption rates. Integrating the Borges and exponential empirical models, a multiparameter coupled mathematical desorption model was constructed incorporating time, vitrinite reflectance, temperature, and particle size. The model shows excellent fitting performance for raw coal from typical mines (R2 > 0.98). This model effectively solves the challenge of accurately estimating initial gas loss during postmining activities. These findings provide a solid theoretical and experimental foundation for the measurement and accounting of postmining methane emissions.

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Cite

BibTeXRIS
BibTeX
@article{ding2026characteristics,
  title = {{Characteristics and Physical–Environmental Coupling Evolution Model of Immediate On-Site Gas Desorption from Coal during Postmining Activities}},
  author = {Hong Ding and Qingming Long},
  journal = {ACS Omega},
  year = {2026},
  month = nov,
  doi = {10.1021/acsomega.6c09299},
  url = {https://pubs.acs.org/acsodf/article/doi/10.1021/acsomega.6c09299/5466532/Characteristics-and-Physical-Environmental},
  note = {CC BY-NC-ND 4.0},
}
RIS
TY  - JOUR
TI  - Characteristics and Physical–Environmental Coupling Evolution Model of Immediate On-Site Gas Desorption from Coal during Postmining Activities
AU  - Hong Ding
AU  - Qingming Long
PY  - 2026
DA  - 2026/11/09
JO  - ACS Omega
DO  - 10.1021/acsomega.6c09299
UR  - https://pubs.acs.org/acsodf/article/doi/10.1021/acsomega.6c09299/5466532/Characteristics-and-Physical-Environmental
AB  - Methane emissions from postmining activities originate from gas dissipation during transport and storage. This study investigates the immediate desorption characteristics and evolution laws of postmining coal through long-term tests on coarse particles and isothermal tests on fine particles under varying parameters. Results show a two-stage desorption process: a rapid linear growth stage posthoisting but before transport and processing, followed by a gradual decline and stabilization. The desorption volume exhibits a two-stage trend with coal rank, fluctuating from low- to high-metamorphic bituminous coal and increasing linearly from high-metamorphic bituminous coal to anthracite. Elevated ambient temperatures and smaller particle sizes significantly accelerate desorption rates. Integrating the Borges and exponential empirical models, a multiparameter coupled mathematical desorption model was constructed incorporating time, vitrinite reflectance, temperature, and particle size. The model shows excellent fitting performance for raw coal from typical mines (R2 > 0.98). This model effectively solves the challenge of accurately estimating initial gas loss during postmining activities. These findings provide a solid theoretical and experimental foundation for the measurement and accounting of postmining methane emissions.
SN  - 2470-1343
ER  -