求翻译：水平应力对巷道围岩稳定性具有重要的影响。当水平应力较高时，巷道顶板冒落、底板底鼓以及两帮内挤等灾害均时有发生，有时会严重影响生产安全。因此掌握水平应力对巷道的影响规律对研究和改善巷道的稳定性有着重要的意义。本文以运用flac3d数值模拟软件，建立了埋深800m，φ6.0m的圆形巷道模型，分析了在侧压系数为1.0,1.2,1.6,2.0 四种情况下巷道围岩的应力、位移、塑性区的变化规律，研究结果表明随着水平应力的增大，巷道的应力分布及最大值，顶底板位移量，以及塑性区范围均呈增大状态。是什么意思？

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In the alleyways of stress level rock stability has a significant impact. When stress levels are high, and alleyways top plate at the bottom, the bottom two, as well as help in disasters such as traffic congestion, there have been serious, and sometimes will affect the production safety. We therefor

Horizontal stress has a significant impact on stability of surrounding rock of roadway. When the stress level is higher, roadway roof fall, backplane, the end of the drum, as well as between two groups within the crowd and other disasters have occurred, sometimes seriously affect production safety.