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为分析各种煤-矸(煤)组合结构与冲击地压之间的关系,采用理论分析、数值模拟及现场验证相结合的方法,提出了复合结构型特厚软煤层“结构性”冲击的概念,探讨了可冲击软煤层的结构模型,并模拟了其应力演变过程。研究表明:复合结构型特厚软煤的缺陷性可能引发“结构性”冲击;“结构性”冲击发生时,沿走向结构承载体的应力集中过程分为3个阶段:复合结构型煤体向结构承载体过渡阶段,结构承载体附加超前应力阶段,结构承载体破坏阶段;随着工作面接近结构煤层,工作面超前支承压力峰值增大,影响范围减小。
In order to analyze the relationship between coal-gangue (coal) composite structures and rockburst, a theoretical analysis, numerical simulation and on-site verification are combined to provide a theoretical basis for the analysis of the “structural” The concept of impact is discussed. The structural model of impact soft coal seam is discussed and its stress evolution process is simulated. The results show that the defect of composite soft coal may lead to “structural” impact. When the “structural” impact occurs, the process of stress concentration along the structural bearing body is divided into three stages: composite structure In the transitional period from structure coal to structural bearing body, the pre-stressed stage of structural bearing body and the failure stage of structural bearing body are carried out. As the working face approaches the structural coal seam, the peak pressure of working bearing face increases and the influence scope decreases.