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看了劉九如和劉方裕兩同志有关推行科學計算軸心壓力的文章以後,覺得其中有些問題的說法還不恰當。因此願就該兩篇文章中的某些論點提出不同看法,与同志們共同討論。一、在怎樣進行調整軸心壓力這個問題上,我認為這要牽涉到很多條件。固然在鑽粒鑽進中根據鑽頭唇面面積的大小和所鑽岩石的物理性質(主要是岩石的硬度、脆性、摩擦性等)來選擇合適的軸心壓力,是其重要因素之一。但是就實際現場情況來看,則不是如此簡單的。就是說,鑽(鋼)粒質量的好壞、全
Having read the articles by Liu Jiu-ru and Liu Fang-yu on the implementation of the scientific calculation of the pressure on the axis, I find it inappropriate to say that some of these problems are true. Therefore, he is willing to put forward different views on some of the two articles and discuss them with his comrades. First, on how to adjust the pressure on the axis, I think this involves a lot of conditions. Although it is one of the most important factors to choose the appropriate axial pressure according to the size of the lip area of the drill bit and the physical properties of the rock to be drilled (mainly the hardness, brittleness and friction of the rock) during drilling. However, the actual scene situation, it is not so simple. In other words, drilling (steel) grain quality is good or bad, all