shear breakdown的用法和样例：
例句
- In mining, if the hard roof is submitted to shear failure, the sidesteps might sink or even collapse.
摘要综放面开采过程中，坚硬顶板超前剪切破坏，会造成工作面台阶下沉，甚至工作面整体垮落。 - This author proposes to force roof carving to prevent shear failure by observing the mine pressure.
通过矿压观测，判断顶板来压方式，采取强制放顶，防止顶板剪切破坏。
词汇搭配
- break down 分解；发生故障；失败...
