当周围岩石中的应力水平高于长期强度，它提出了变形的损伤作用。
When the stress level in surrounding rock is higher than long-term strength, it presents deformation damage effect.
当周围岩石中的应力水平低于长期强度，提出的损伤作用。
When the stress level in surrounding rock is lower than long-term strength, it presents time damage effect.
粘聚强度C是岩石力学领域极为重要的力学参数，然而其定义却长期不统一。
C is a significant mechanics parameter in rock mechanics field, but its definition is disunion.
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