论文部分内容阅读
刘九如同志在“推行科学計算軸心压力的一些体会”一文中談到:鑽粒鑽进中只有在C>SP时,才能不断地尅取岩石,保持一定的鑽进效率(見地質工作通报18期)我認为这是不够确切的(C为孔底給进压力,S为鑽头底面积,P为單位压力)。鑽粒鑽进中S.P应該是孔底需要的压力。当C=SP时,鑽进效率为最好,如在鑽粒質量極劣的情况下,C应略小於SP,否則將起相反的效果,或引起鑽进效率降低。这可以由鑽粒在孔底的工作情况来說明的。当鑽粒投
Comrade Liu Jiu-ru said in his article “Some Experiences in Carrying out Axial Pressure in Scientific Computation”: Only when C> SP is drilling can the rock be continuously taken and the drilling efficiency maintained (see Geological Work Bulletin 18 ) I think this is not exact enough (C is the pressure at the bottom of the hole, S is the area of the bottom of the drill, and P is the unit pressure). Drilling into the S.P should be the pressure required at the bottom of the hole. When C = SP, the drilling efficiency is the best. For example, C should be slightly smaller than SP in the case of poor quality drill, otherwise it will have the opposite effect or cause the drilling efficiency to decrease. This can be borne out by the operation of the bottom of the hole to illustrate. When drilling grain cast