overlying rock meaning in English

覆盖岩石

Chunks of the overlying rock may break off and become a part of a sill .
上复岩石的碎块可能破裂并成为岩床的一部分。
Dynamic characteristics and stability analysis of laneway group in overlying rock caving porcess
覆岩崩落过程中群巷动力特征与稳定性分析
Numerical simulation study on effects of overlying rock and seam far way from protective coal seam
远程下保护层开采煤岩体卸荷效应模拟研究
The deformation regularity of overlying rock masses under the condition of complex structures in coal mines
复杂构造条件下煤矿上覆岩体移动规律研究