1) drilling
钻眼
1.
Since the degree of consolidation is higher,and when the bore is freezing,dig to the pit shaft,the soil has fundamentally consolidated,the efficiency being under construction is extremely low,month drilling depth is only 30～40 ms.
后尝试采用钻眼爆破法施工,效率提高一倍以上,取得较好的经济效益。
2) Drilling and blasting
钻眼爆破
1.
Drilling and blasting are important components in mine construction design.
钻眼爆破工作是矿山施工设计的重要组成部分。
3) dry and wet drill holes
干式与湿式钻眼
4) De Florez predrilling method
德－弗劳瑞兹钻眼检查法
5) machine for tunnel drilling and blasting operation
隧道钻眼爆破机械
补充资料：钻眼
说明：补充资料仅用于学习参考，请勿用于其它任何用途。