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使用切削式钻头,用螺旋钻杆排出岩屑的旋转钻孔方式在露天采场中得到了广泛的应用。这是因为这种钻孔方式的效率高、单位能耗低、粉尘和振动都不大。在1978～1981年间,CBP—160—24型钻机开始取代过时的CB—2M钻机而进入露天采场。这种钻机的回转功率,轴压力和推进行程大大地超过了CB—2M钻机的相应参数。《艾克巴斯土兹煤田》的煤层和含煤的岩石钻孔作业中,CP—160—24钻机得到了最广泛的应用。这种钻
The use of cutting bit, rotary drill pipe expelled rotary cuttings in open pit mining has been widely used. This is because of the high efficiency of this drilling method, the unit of low energy consumption, dust and vibration are not large. During 1978-1981, the CBP-160-24 rig began to replace the outdated CB-2M rig into the open pit. The rotary power, axial pressure and thrust travel of this rig considerably exceed the corresponding parameters of the CB-2M rig. The CP-160-24 drill rig has been used most widely in the coal seams and coal-bearing rock drilling operations in the “Ecke Bastize Field”. This kind of drill