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国外金属矿山为提高矿石产量,露天开采采用新型穿孔设备,发展汽车运输;地下开采运用采矿强度高的无底柱分段崩落法和无轨柴油驱动设备,并加强以设备维修为重点的矿山管理工作。露天矿开采使用新型高效设备在穿孔作业中,新型牙轮钻机加大轴压,改进钻头,因而继续得到发展。在有些极坚硬的矿岩(如铁燧岩、花岗岩等)的穿
Foreign metal mines In order to increase ore output, open-air mining adopts new perforation equipment to develop automobile transportation. Underground mining adopts pillarless caving and trackless diesel driven equipment with high mining intensity and strengthens mine management focusing on equipment maintenance . Open-pit Mines Utilize New and High-Efficient Equipment In the piercing operation, the new roller cone drill increases axial pressure and improves drills and continues to evolve. Wear in some very hard ore rocks (such as taconite, granite, etc.)