岩石晶粒的破碎，将导致扩容，并产生体积膨胀力。
Dilatancy and volume expansive force are caused by the breaking of rock grains.
岩石破碎比功表征钻井中破碎单位体积岩石的功耗量。
The rock crushing work ratio denotes the work used to break rock of per volume in drilling.
分析试验结果得出，对于表面刮削破碎和体积破碎两种岩石破碎状态，钻压对扭矩的影响不一样。
The result of experiment shows that the effect of weight on bit on the torque is different for two different conditions of surface scraping rock break and volume break.
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