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现在，采用迴转、冲击和冲击迴转钻进法钻凿岩石。迴转钻进时岩石破碎是由两个静力作用而发生：迴转钻头的圆周力和使钻头切削具吃入岩石的轴心压力。
Drilling rocks is now done using rotary, impact and impact rotary drilling methods. Rock crushing occurs when two rotors are rocked by two static forces: the circular force of the rotary drill bit and the axial pressure that causes the bit cutter to eat into the rock.