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Study on the Response of Chemical Kinetics of Fragmented Coal Under Dynamic Load

Author

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  • Liang Wang

    (State Key Laboratory of Coal Mine Disaster Dynamics and Control, Chongqing University, Chongqing 400044, China
    School of Resources and Safety Engineering, Chongqing University, Chongqing 400044, China)

  • Wushuang Wen

    (State Key Laboratory of Coal Mine Disaster Dynamics and Control, Chongqing University, Chongqing 400044, China
    School of Resources and Safety Engineering, Chongqing University, Chongqing 400044, China)

  • Wenjie Xu

    (State Key Laboratory of Coal Mine Disaster Dynamics and Control, Chongqing University, Chongqing 400044, China
    School of Resources and Safety Engineering, Chongqing University, Chongqing 400044, China)

  • Kai Zhu

    (State Key Laboratory of Coal Mine Disaster Dynamics and Control, Chongqing University, Chongqing 400044, China
    School of Resources and Safety Engineering, Chongqing University, Chongqing 400044, China)

  • Xiaoqing Guan

    (State Key Laboratory of Coal Mine Disaster Dynamics and Control, Chongqing University, Chongqing 400044, China
    School of Resources and Safety Engineering, Chongqing University, Chongqing 400044, China)

Abstract

As coal resources deplete and deep mining in high-stress environments becomes more challenging, ensuring safety and sustainability in coal production is a growing concern. This study investigates the dynamic of external load on the oxidation kinetics of coal in goaf, focusing on the resulting physical and chemical changes. Thermogravimetric (TG), differential thermogravimetric (DTG), and differential scanning calorimetry (DSC) tests were conducted on long-flame coal samples under varying hammer-drop heights. Impact-loaded coal shows a shorter reaction time, higher peak intensity, and lower apparent activation energy than untreated coal. These effects intensify with increasing drop height, resulting in a 13–40% reduction in apparent activation energy. A six-step reaction pathway for pyrolysis and oxidation was developed, and kinetics parameters were determined using genetic algorithms (GA). GA-based inverse modeling produced a comprehensive reaction model for coal oxidation under dynamic load. This work presents a detailed kinetic model for coal oxidation under impact, contributing to better understanding the challenges of safety and sustainability in deep coal mining.

Suggested Citation

  • Liang Wang & Wushuang Wen & Wenjie Xu & Kai Zhu & Xiaoqing Guan, 2025. "Study on the Response of Chemical Kinetics of Fragmented Coal Under Dynamic Load," Sustainability, MDPI, vol. 17(8), pages 1-20, April.
    • Handle: RePEc:gam:jsusta:v:17:y:2025:i:8:p:3677-:d:1637651
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    References listed on IDEAS

    as
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