建立了矿井围岩-断层系统的准静态形变平衡方程，将呈剪切破裂形式的断层失稳过程归结为折迭突变模型。

The equilibrium equation of surrounding rock mining fault system is established. The fault destablizing process with shear failure pattern belongs to fold catastrophe model.

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利用新的含微孔材料模型对塑性材料局部剪切失稳进行了分析。

By means of a new void - containing material model, analysis of shear localization for plastic materials is carried out.

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又对单轴压缩岩样剪切破坏进行了分析，得到了其失稳判据。

Next, analysis of uniaxial compression tests for rock specimens subject to shear failure is conducted and the criterion of instability is deduced.

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