With the increasing depth of coal mining and expanding mining scale, the rocks surrounding deep roadways are in a complex mechanical condition of frequent dynamic disturbance. The heterogeneity has an important influence on rock mass failure under dynamic loads. Therefore, it is necessary to study the deformation and failure of heterogeneous roadway under dynamic load. In this paper, the effect of heterogeneity on stability of roadway under static and different dynamic loads is studied. According to the results, the effect of rock mass heterogeneity on the deformation and failure of surrounding rock varies with different degrees of heterogeneity. Under static loading conditions, the stability of roadway is negatively correlated with the degree of heterogeneity of the rock mass. Under dynamic loading conditions, the change of heterogeneity degree has significant influence on the stability of surrounding rock. With the increase in dynamic load strength, the change in variation difference in the average value of roof sag, stress distribution, and plastic zone caused by variations in heterogeneity will increase. This study contributes to understanding the deformation and failure characteristics of heterogeneous roadways under dynamic loads and can be used to analyze heterogeneous roadways under dynamic loads.

中文翻译：

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动态荷载下非均质性对地下巷道稳定性影响的数值分析

随着煤矿开采深度的增加和开采规模的扩大，深巷道围岩处于动态扰动频繁的复杂力学状态。非均质性对动荷载作用下的岩体破坏有重要影响。因此，有必要研究动力荷载作用下非均质巷道的变形与破坏。本文研究了静载荷和不同动载荷下非均质性对巷道稳定性的影响。结果表明，岩体非均质性对围岩变形破坏的影响因非均质性程度不同而不同。在静载条件下，巷道稳定性与岩体的非均质程度呈负相关。在动态加载条件下，非均质度的变化对围岩的稳定性有显着影响。随着动荷载强度的增加，由非均质性变化引起的顶板垂度平均值、应力分布和塑性区的变化差值的变化会增大。本研究有助于理解动力荷载作用下异质巷道的变形破坏特征，可用于分析动力荷载作用下的异质巷道。