The SIF decreases with the friction coefficient rising when the surface crack tip lies in the base and the reflective crack length is more than a certain value.
反射裂缝裂尖位于面层中且裂缝长度大于某一值时，应力强度因子随着摩擦系数的增加而减小。
2
The deformation moduli increase with increment of crackfriction coefficient and decrease with increment of crack density parameter.
随着裂隙摩擦系数的增加，变形模量有逐渐增加的趋势。
3
For the deformation of fractured rock mass, crack density parameter and crackfriction coefficient are the most important parameters.