鋼粒(鋼絲绳所切成的鑽粒)鑽進是蘇聯的先進經驗之一。這方法對我們說來,還是一項新的技術。為充分發揮鋼粒鑽進的作用,就須探求其尅取理論,找出提高效率的原因,以便更好地加以應用。為此,我們曾作了專門性的試驗,现將我們試驗的初步成果提出與大家商討。一、鋼粒在十級磁鐵石英岩中的尅取動態見图1圖2:所用鋼絲繩鑽粒的熱處理均匀、正常、强度和 Drilling of steel pellets (wire cut diamonds) is one of the advanced experiences of the Soviet Union. This method is still a new technology for us. In order to give full play to the role of steel grain drilling, we must explore its theory, to find out the reasons for improving efficiency in order to better be applied. For this reason, we have conducted a special experiment. We are now discussing the preliminary results of our trial. First, the grain in the ten magnesia quartz rock grams of dynamic see Figure 1 Figure 2: The wire rope used in the heat treatment uniform, normal, and