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<p>This study investigates the coupled material–structural influence on coal bursts in deep coal roadways. Integrating theoretical analysis, numerical simulation, and physical model testing, the roles of coal bursting proneness, surrounding rock stiffness, and dynamic load disturbances in triggering coal bursts were systematically examined. An FDEM (finite-discrete element method) numerical model simulated the failure processes of coal-rock composites under varying roof stiffness conditions. The analysis revealed distinct energy conversion patterns governing different coal bursting proneness types subjected to roof pressure. Roadway failure simulations demonstrated lower coal fragment ejection velocities in non-burst-prone seams compared to highly burst-prone seams. Critical parameters for evaluating coal mass instability were determined based on energy conversion patterns within the roof–coal–floor system, confirming the influence of roof and floor stiffness changes on dynamic failure of coal. Combined static–dynamic loading tests, conducted via both numerical simulation and physical modeling, identified key instability evaluation parameters under dynamic conditions and revealed a distinct transition in roadway failure modes under dynamic disturbances. Finally, by analyzing the mechanisms of coal bursting proneness, surrounding rock stiffness, and external dynamic loading, a material–structural coupling mechanism for roadway failure was proposed. This mechanism provides a theoretical basis for coal burst prevention and control strategies in deep mining.</p>

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Role of Coal Properties and Surrounding Rock Stiffness in Coal Burst Triggering Under Superimposed Dynamic Loads During Deep Mining

  • 期刊论文

  • 发表日期：

    2026年2月2日

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  • Minghe Ju,
  • Liyuan Yu,
  • Yang Zou,
  • Lihua Hu,
  • Linming Dou,
  • Lianpeng Dai,
  • Minjie Ding,
  • Baoshan Yao

摘要

This study investigates the coupled material–structural influence on coal bursts in deep coal roadways. Integrating theoretical analysis, numerical simulation, and physical model testing, the roles of coal bursting proneness, surrounding rock stiffness, and dynamic load disturbances in triggering coal bursts were systematically examined. An FDEM (finite-discrete element method) numerical model simulated the failure processes of coal-rock composites under varying roof stiffness conditions. The analysis revealed distinct energy conversion patterns governing different coal bursting proneness types subjected to roof pressure. Roadway failure simulations demonstrated lower coal fragment ejection velocities in non-burst-prone seams compared to highly burst-prone seams. Critical parameters for evaluating coal mass instability were determined based on energy conversion patterns within the roof–coal–floor system, confirming the influence of roof and floor stiffness changes on dynamic failure of coal. Combined static–dynamic loading tests, conducted via both numerical simulation and physical modeling, identified key instability evaluation parameters under dynamic conditions and revealed a distinct transition in roadway failure modes under dynamic disturbances. Finally, by analyzing the mechanisms of coal bursting proneness, surrounding rock stiffness, and external dynamic loading, a material–structural coupling mechanism for roadway failure was proposed. This mechanism provides a theoretical basis for coal burst prevention and control strategies in deep mining.