看了“地質与勘探”第九期和第十三期上所載的有关鑽粒鑽进剋取原理的几篇文章以后,使我感到很大兴趣。正因为这一問題在理論以及实踐上还沒有得統一的認識,所以这种研究和討論是很必要的。現就將个人对这一問題的浅薄認識提出,請大家提出批評指正。鑽粒鑽进的剋取原理是比較复杂的,远不同于合金鑽进。但是,我認为其尅取岩石所必須具备的基本 After reading several articles on the principles of drilling, drilling and extraction in the ninth and thirteenth phases of Geology and Exploration, I became very interested. It is precisely because this issue has not obtained a unified understanding in theory and practice, so this kind of research and discussion is very necessary. Now, I will raise my personal understanding of this issue. Please ask me to criticize and correct me. The gram-picking principle of drill boring is more complicated than that of alloy drilling. However, I think it must be basic to get the rock.