These types of structural surfaces are the weak part of the rock mass. Their stiffness and strength are much smaller than the rock matrix material.

这些各种类型的结构面正是岩体中的薄弱部分，它们的刚度和力学强度比岩石母体材料小得多。

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These types of structural surfaces are the weak part of the rock mass. Their stiffness and strength are much smaller than the rock matrix material.

这些各种类型的结构面正是岩体中的薄弱部分，它们的刚度和力学强度比岩石母体材料小得多。

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