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在过去的10年中,露天开采的各种钻进方法,即用重型风动凿岩机、液压凿岩机、潜孔钻机和牙轮钻机凿岩,都有很大发展。无论在小型采石场或是在大型露天矿,液压凿岩机在凿岩效率和经济效益方面都取得了很大的进展。重型风动凿岩机和潜孔钻机等风动凿岩设备,一直是露天采石场的穿孔设备。有些大型采石场也采用牙轮钻机。液压凿岩机或导轨式凿岩机,在70年代初期才开始用于地下隧道掘
In the past 10 years, various drilling methods for open pit mining, that is, rock drilling with heavy-duty pneumatic rock drills, hydraulic rock drills, down-hole drilling rigs and roller-cone drilling rigs have greatly developed. Hydraulic rock drills have made great progress both in rock drilling efficiency and in economic efficiency, whether in small quarries or in large opencast mines. Pneumatic rock drilling rigs and DTH drilling rigs and other pneumatic rock drilling equipment, has been open-pit quarrying equipment. Some large quarries also use a roller rig. Hydraulic rock drill or rock drill, began in the early 70s for underground tunnel excavation