前 言 凿岩机自1857年诞生以后,各国学者对它进行了许多研究。在早期,由于受当时科技水平的限制以及凿岩机内部动力过程的复杂性,人们难以精确了解机器的内部过程,只能在对机内部过程进行简化的基础上,进行简化计算,然后用修正系数修正,这种局面一直持续到本世纪七十年代。 Preface Drilling rig since its birth in 1857, scholars from various countries carried out a lot of research on it. In the early days, due to the limitation of science and technology at that time and the complexity of dynamic process inside the rock drill, it was difficult for people to understand the internal process of the machine accurately. The simplified calculation was only based on the simplification of the internal process of the machine, and then corrected with the correction factor , This situation lasted until the seventies of this century.