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利用Comsol4.2a有限元多物理场耦合软件,“动态”剖分模型采掘空间,通过计算识别塑性损伤判据函数F’≥0的区域,最终模拟模拟了在不同采掘扰动范围、不同含水层与断层水压力影响下巷道围岩发生塑性损伤变化情况,结果显示:岩体水压不变时,采掘扰动形成的应力集中区的塑性损伤范围大于采场底板,且随着采场宽度的延伸,围岩在垂向及水平方向塑性损伤范围增大;采场宽度不变时,随着岩体水压的增大,导致围岩力学强度降低,塑性破坏范围增大,且断层带内塑性损伤加剧。
Using Comsol4.2a finite element multiphysics coupling software, the dynamic model is used to excavate the space, and the region of the plastic damage criterion function F’≥0 is identified by calculation. Finally, the model is simulated in the range of different mining disturbances, The results show that when the pressure of rock mass is constant, the plastic damage area of stress concentration area formed by mining disturbance is larger than the stope floor, and with the width of stope The plastic damage range of surrounding rock increases in vertical and horizontal direction. When the stope width is constant, with the increase of rock pressure, the mechanical strength of surrounding rock decreases, the plastic failure range increases, and the fault zone Plastic injury worsened.