Based on the principle of conversation of energy,the energy for rotary drilling has been analyzed.
旋转钻进是岩土工程钻探的主要钻进方式,从能量守恒原理出发,对旋转钻进的能量进行分析。
Based on the construction practice and the theoretical analysis, the technique for auger-percussive-rotary drilling is defined.
以施工实践为基础,结合理论分析,提出了一种在岩土锚固工程施工中广泛应用的新型钻探工艺技术———螺旋冲击回转钻进技术。
