rock strata movement 岩层移动
rock-strata-structure 岩石地层构造和地质事件
key rock strata 关键层
rock strata and construction internship 岩石地层和构造实习
For the coal seam dip angle is larger than 45°,the effect of forces along the plane of rock strata is bigger than the effect of forces perpendicular to the plane,so the strata failure mechanism and strata movement pattern are distinctly different from horizontally or gently inclined coal seam mining.
由于煤层倾角大于45°,岩层受切向作用力大于法向作用力,急倾斜煤层开采岩层变形破坏机理、岩层移动机制、地表移动规律与水平煤层开采有显著的不同。
参考来源 - 急倾斜煤层开采岩层破坏机理及地表移动理论研究·2,447,543篇论文数据，部分数据来源于NoteExpress
Contained within the rock strata is evidence that the region was intensely dry 15,000 years ago.
岩层中的证据表明该地区在15,000 年前曾经非常干旱。
And adjustment in rock strata means that loose soil will sink or heave.
岩层的调整意味着松动了的泥土将会下沉或者鼓起。
Thus, jutting peaks of sheer rock with the rock strata going almost vertical occur.
因此，岩石的峰尖突出，岩层方向几乎是垂直的。
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