中文摘要：

一个修改不连续的变丑分析(DDA ) 算法被建议模仿连接岩石的失败行为。在建议算法，由使用 Monte-Carlo 技术，随机的联合网络在兴趣的领域被产生。基于联合网络，三角形的 DDA 块系统被采用先进前面方法自动地产生。在产生块的过程，众多的人工的关节形成了，并且一旦在一些人工的关节的压力状态满足预先给的失败标准，人工的关节将变成真实关节。这样，岩石质量的整个破碎过程能被复制。算法逻辑详细被描述，并且几个数字例子被执行获得某卓见进包含随机的关节的岩石质量的失败行为。从数字结果，裂缝从裂缝尖端开始，这能被发现，裂缝的生长方向取决于装载和限制条件，和建议方法能在岩石的整个过程复制一些复杂现象失败。

英文摘要：

A modified discontinuous deformation analysis （DDA） algorithm was proposed to simulate the failure behavior of jointed rock. In the proposed algorithm, by using the Monte-Carlo technique, random joint network was generated in the domain of interest. Based on the joint network, the triangular DDA block system was automatically generated by adopting the advanced front method. In the process of generating blocks, numerous artificial joints came into being, and once the stress states at some artificial joints satisfy the failure criterion given beforehand, artificial joints will turn into real joints. In this way, the whole fragmentation process of rock mass can be replicated. The algorithm logic was described in detail, and several numerical examples were carried out to obtain some insight into the failure behavior of rock mass containing random joints. From the numerical results, it can be found that the crack initiates from the crack tip, the growth direction of the crack depends upon the loading and constraint conditions, and the proposed method can reproduce some complicated phenomena in the whole process of rock failure.