longwall top - coal caving mining
英
美
longwall top - coal caving mining的用法和样例:
例句
- 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。