vertical shield

• 顶板

vertical shield的用法和样例：

例句

1. Vertical stress makes rock stratum reforming voussoir beam, horizontal in-situ stress is the main source to cause the voussoir beam crushed.
   竖直方向地应力使顶板岩层形成铰接拱结构，水平地应力是拱铰压碎的主要力源。
2. The study manifested the uncoupled pattern of the peak stresses in vertical and horizontal directions, as well as the stress evolution trace varying with pillar width.
   揭示了煤体边缘水平应力和垂直应力峰值不耦合的规律以及巷道顶板应力峰值随煤柱宽度不同而演化的轨迹。