岩体的变形实质上由岩块的弹性变形、岩块的塑性变形和节理裂隙的延展三者产生的变形之和。节理岩体的强度特性与节理裂隙的发育与延展密切相关。根据损伤力学与断裂力学理论,通过模拟岩体节理裂隙在不同开挖条件下的延展而引起损伤张量的变化,探讨岩体强度与损伤张量之间的关系以表征其岩体强度的时空变化与各向异性。 The deformation of the rock mass is essentially the sum of the deformations caused by the elastic deformation of the rock mass, the plastic deformation of the rock mass and the extension of the joint fissure. The strength characteristics of jointed rock mass are closely related to the development and extension of jointed and fractured rock. According to the theory of damage mechanics and fracture mechanics, the change of damage tensor is simulated by simulating the extension of rock joint fractures under different excavation conditions, and the relationship between rock mass strength and damage tensor is discussed to characterize the space-time of rock mass strength Change and Anisotropy.