The experimental results showed that micro cracks resulted from rock deformation could lead to volume dilatation and non-linear deformation of rock.
实验研究表明，变形导致的岩石微破裂会使岩石产生扩容(体积膨胀)和非线性变形。当差应力达到岩石的屈服应力时，扩容和非线性应变开始。
The volume dilatation and the non-linear deformation of rock originated, when the differential stress equals to the yield point of rock.
当差应力达到岩石的屈服应力时，扩容和非线性应变开始。此外，随应力水平的增加，扩容和非线性变形呈幂函数形式增加。
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