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<p>With the increasing mining depth, the dynamic disaster of outburst coal seam presents the characteristics of low gas outburst and strong dynamic load disturbance outburst, which makes the disaster prevention face serious challenges. The tectonic coal development is a significant geological feature of dynamic disasters. Therefore, this paper studies the stress and deformation evolution laws of tectonic coal stratified workface under the coupling action of dynamic and static loads. Based on the safety barrier model, the mechanical model of disaster initiation and the basis for disaster initiation discrimination were established. The evolution process of compound dynamic disasters induced by the failure of the safety barrier was revealed. It is found that the instability of the safety barrier under the action of disturbance stress and static load stress are the main reasons for the initiation of disasters. The monitoring method for the stress field of deep outburst coal seams was proposed. The static load stress of the workface was monitored by using the vibration wave CT inversion technology, and the disturbance stress of the workface was monitored by using the microseismic system. The high stress and high disturbance areas monitored have experienced dynamic disaster manifestation events. Based on the mechanical model of disaster initiation, the dynamic disaster manifestation events were analyzed and calculated, validated the accuracy of the model. The research results provide a theoretical basis for the monitoring and prevention of compound dynamic disasters in deep mines.</p>

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Study on Compound Dynamic Disaster Mechanism of Safety Barrier Instability and Stress Field Monitoring Technology in Deep Outburst Coal Seam

  • 期刊论文

  • 发表日期：

    2026年6月16日

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  • Gang Yang,
  • Dazhao Song,
  • Xueqiu He,
  • Anliang Lu,
  • Liming Qiu,
  • Minggong Guo,
  • Yingjie Zhao,
  • Jintao Dang

摘要

With the increasing mining depth, the dynamic disaster of outburst coal seam presents the characteristics of low gas outburst and strong dynamic load disturbance outburst, which makes the disaster prevention face serious challenges. The tectonic coal development is a significant geological feature of dynamic disasters. Therefore, this paper studies the stress and deformation evolution laws of tectonic coal stratified workface under the coupling action of dynamic and static loads. Based on the safety barrier model, the mechanical model of disaster initiation and the basis for disaster initiation discrimination were established. The evolution process of compound dynamic disasters induced by the failure of the safety barrier was revealed. It is found that the instability of the safety barrier under the action of disturbance stress and static load stress are the main reasons for the initiation of disasters. The monitoring method for the stress field of deep outburst coal seams was proposed. The static load stress of the workface was monitored by using the vibration wave CT inversion technology, and the disturbance stress of the workface was monitored by using the microseismic system. The high stress and high disturbance areas monitored have experienced dynamic disaster manifestation events. Based on the mechanical model of disaster initiation, the dynamic disaster manifestation events were analyzed and calculated, validated the accuracy of the model. The research results provide a theoretical basis for the monitoring and prevention of compound dynamic disasters in deep mines.