combined mining caving working face

• 综放

combined mining caving working face的用法和样例：

例句

1. 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。
2. With the increase of the depth of coal seams mined, rock bursts will easily occur in gateways with fully-mechanized sublevel caving mining.
   摘要随着煤矿开采深度增加，综放开采回采巷道易发生冲击地压危害。