本文简要介绍了损伤力学的发展.将损伤力学理论应用于节理岩体中,采用一个对称的二阶张量描述岩体内节理、裂隙引起的各向异性损伤.根据岩体内裂隙的概率统计模型,提出了一种计算节理岩体初始损伤张量的方法.在岩体的强度预测中,采用损伤力学和裂隙模拟两种分析方法,根据某工程的裂隙实测资料计算了岩体的初始损伤张量,建立了裂隙的概率统计模型,采用Monte-Carlo法模拟裂隙的分布,然后用平面非线性有限元计算预测岩体强度.两种分析结果进行对比,得到了较好的结论. In this paper, the development of damage mechanics is briefly introduced. The damage mechanics theory is applied to the jointed rock mass, and a symmetrical second-order tensor is used to describe the anisotropic damage caused by joints and cracks in the rock. According to the probability statistics of cracks in the rock mass Based on the model, a method for calculating the initial damage tensor of jointed rock mass was proposed. In the strength prediction of rock mass, two analysis methods, damage mechanics and crack simulation, were used to calculate the initial damage of rock mass based on the measured fracture data of a project. Tensor, a probabilistic statistical model of fractures was established, the Monte-Carlo method was used to simulate the distribution of fractures, and then plane non-linear finite element calculations were used to predict rock mass strength. The results of the two analyses were compared and a good conclusion was obtained.