当床上用品的倾角小于岩石内摩擦角，岩层分离和一些岩石块，在每一块岩石地层滑动沿节理面作为一个整体。
When the dip of bedding is less than the friction Angle of rock, the rock stratum will separate and some rock blocks in every rock stratum may slide along joint surface as a whole.
分析结果表明，在地应力和支护阻力一定时，岩石的内摩擦角对深埋巷道围岩位移的影响最为明显。
The results show that the internal friction Angle of rock has importance affect on the displacement of surrounding rock for deep roadway when in-situ stress and support resistance all are certain.
考虑岩石粘聚力和内摩擦角的变化，进行了一个和二个隧道周围的应力分布的参数研究，内摩擦角？
By considering the variations of the cohesion and the Angle of internal friction for rock, the parameter studies on the stress distribution around one and two tunnels were carried out.
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