vertical shield的用法和樣例：
例句
- Vertical stress makes rock stratum reforming voussoir beam, horizontal in-situ stress is the main source to cause the voussoir beam crushed.
豎直方向地應力使頂板巖層形成鉸接拱結構，水平地應力是拱鉸壓碎的主要力源。 - 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.
揭示了煤體邊緣水平應力和垂直應力峰值不耦合的規律以及巷道頂板應力峰值隨煤柱寬度不同而演化的軌跡。
