研究目的：为探究含有不同倾角预制裂隙岩石受压状态下,其物理力学性质变化以及内部裂纹的扩展发育情况,本文利用颗粒流软件构建二维单轴压缩试验模型,模拟含不同倾角裂隙岩石的单轴压缩试验,通过不同倾角裂隙岩石模拟结果的对比,分析裂隙倾角对岩石抗压强度及裂纹扩展特征的影响。
研究结论：（1）完整岩石试样的峰值强度和累积微裂纹数目最大,随着裂隙倾角增加试样的单轴峰值强度和累积微裂纹数目先下降而后增加,在裂隙倾角为30°时试样的单轴峰值强度和累积微裂纹数目均最小;（2）裂隙倾角不同时试样最终破坏模式基本上都是以剪切破坏为主,并伴随着局部拉伸破坏,但是裂隙必然会造成试样破坏时裂纹扩展形态发生改变,且以裂隙倾角60°为界线;（3）不同裂隙倾角的试样裂纹扩展过程均可以划分为三个阶段：无裂纹阶段、裂纹缓慢扩展阶段、裂纹快速扩展阶段,且30°裂隙倾角试样在单轴压缩模拟时最早出现微裂纹;（4）裂纹扩展特征有助于工程人员分析岩体工程的破坏机理,并据此制定相应的支护维稳措施,本研究结果对维护工程安全具有广阔的应用前景。

Research purposes: In order to investigate the changes in physical and mechanical properties and the expansion and development of internal cracks in the compression state of prefabricated fissured rocks with different inclination angles, this paper constructed a two-dimensional uniaxial compression test model using particle flow software. In order to simulate the uniaxial compression test of fissured rocks with different inclination angles, and to analyze the influence of fissure inclination angle on the compressive strength and crack expansion characteristics of rocks, a comparison was made of the simulation results of fissured rocks with different inclination angles.
Research conclusions: (1) The peak strength and cumulative number of microcracks of the intact rock specimens are the largest. As the fissure inclination increases, the peak uniaxial strength and cumulative number of microcracks of the specimens initially decrease and then increase. The peak uniaxial strength and cumulative number of microcracks of the specimens are the smallest at a fissure inclination angle of 30°. (2) The final damage mode of the specimens with different slit inclination angles is predominantly shear damage, accompanied by local tensile damage. However, the slit inevitably results in alterations to the crack extension pattern when the specimens are damaged, with the slit inclination angle of 60° representing a critical boundary. (3) The crack expansion process of specimens with different crack inclination angles can be divided into three stages: the initial stage, the slow crack expansion stage, and the rapid crack expansion stage. The earliest microcracks appeared in the uniaxial compression simulation of specimens with a 30° crack inclination angle. (4) The crack expansion characteristics are helpful for engineers to analyze the failure mechanism of rock mass engineering, and formulate the corresponding support and stability maintenance measures accordingly. The research findings have broad application prospects for the maintenance of engineering safety.