采用非线性有限元法，对深井巷道围岩应力及变形状态进行了数值计算。
With the non-line finite element method, the numberical value calculation on the stress and deformation of surrounding rock of deep mine roadways has been presented.
根据应变协调条件，推导出了套管、水泥环及地层受力变形状态的计算公式。
According to strain coordination condition, the force and deformation state formulas of casing, cement loop and stratum are derived.
通过对切屑截面几何、变形状态及切削比的实验分析，研究了非自由切削的变形特征。
The deformation characteristics of non free cutting (NFC) are experimentally studied with the chip cross section geometry, the deformation configuration and the cutting ratio.
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