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目前,牙轮钻机是金属露天矿山开采的主要穿孔设备,由于它采用了较先进的液压传动系统,使它在穿孔作业过程中的绝大部份辅助动作都是采用液压传动方式来实现。所以,与其它类型穿孔设备如潜孔钻机相比较,它不仅钻
At present, the roller cone drilling rig is the main perforation equipment for the mining of open-pit metal mines. Because it uses a more advanced hydraulic transmission system, most of the auxiliary actions during the drilling operation are realized by hydraulic transmission. Therefore, it drills more than other types of piercing equipment such as downhole drilling rigs