The influences of the shear descending modulus, the internal length parameter of rock material, the differential stress and shear stress rate on shear localization are investigated.

研究了剪切降模量及岩石材料内部长度等参数对剪切带内部应变（率）的影响。

The radial net- fracture propagation pattern is primary under low differential stress and has two dimensional leak-off and smooth pressure curve.

径向网状扩展模式在水平主应力压差低的条件下占优势，压力曲线平缓，属于二维滤失。

In triaxial compression, an expression for the post-peak slope of differential stress-strain curve of rock specimen that is composed of the material with different grain diameters is proposed.

在三轴压缩条件下，得到了由多直径颗粒体材料构成的岩样的差应力-应变曲线的峰后斜率的表达式。