结构弱面对于岩(煤)体力学性能具有显著影响。在地质构造作用或开采活动的影响下，深部矿井中普遍存在含宏观裂隙的煤岩组合结构形式的围岩。因此，研究裂隙煤岩组合结构试样的力学性能对于深部井巷围岩控制以及煤岩动力灾害防治具有重要意义。研究对比分析了不同裂隙位置和裂隙角度对裂隙煤岩组合结构试样力学特性演变及渐近破坏特征的影响；进一步建立了裂隙煤岩组合结构的离散元模型，分析了裂隙位置与角度变化下的模型应力场演化、裂纹萌生扩展−特征应力值动态演变关系；最后，结合裂隙尖端应力场理论和界面约束效应理论，探讨了裂隙组合结构试样的力学机制。结果表明：裂隙主要作用于结构内的煤体，导致煤岩组合结构试样的强度和变形能力显著降低。试样的裂纹闭合应力、屈服应力、峰值应力、初始变形模量和弹性模量均随裂隙角度的增加而呈指数上升趋势。界面裂隙导致组合结构试样的损伤启动提前，屈服阶段的声发射计数在整个加载过程中占比较高。当裂隙角度靠近水平时，试样在达到峰值应力前裂纹扩展较快，累计损伤程度更大。不同试样的应变集中带均倾向于向煤体内传播，最终导致单材料或跨界面的宏观拉伸裂纹形成。研究还确定了力链场和应力场的特征区域分布，发现裂隙角度的变化会造成特征区域的偏转，其对界面约束效应产生显著影响。裂隙显著改变了常规煤岩组合结构中煤、岩体的极限强度分布。

The structural weak planes have a significant impact on the mechanical properties of rock (coal) masses. Under the influence of geological structures or mining activities, the surrounding rock in deep mines commonly exhibits a coal-rock combination structure containing macroscopic fractures. Therefore, studying the mechanical properties of fractured coal-rock combination samples is of great importance for the control of surrounding rocks in deep tunnels and for the prevention and mitigation of dynamic coal and rock disasters. The study conducts a comparative analysis of the effects of different fracture positions and fracture angles on the evolution of the mechanical properties and the progressive failure characteristics of fractured coal-rock combination samples. Furthermore, a discrete element model of the fractured coal-rock combination structure was established to investigate the evolution of the stress field, as well as the dynamic relationship between crack initiation and propagation and the characteristic stress values under varying fracture positions and angles. Finally, based on the theory of stress fields at fracture tips and interface constraint effects, the mechanical mechanism of the fractured combination structure under uniaxial compression were discussed. The results indicate that fractures primarily affect the coal mass within the structure, leading to a significant reduction in both strength and deformation capacity of the coal-rock combination structure samples. As the fracture angle increases, crack closure stress, yield stress, peak stress, initial deformation modulus, and elastic modulus of the samples all show an exponential increase. The presence of interface fractures causes earlier initiation of damage in the combination structure samples, and during the yield stage, the acoustic emission count occupies a relatively high proportion throughout the entire loading process. When the fracture angle is close to horizontal, the cracks in the samples propagate rapidly before reaching peak stress, and the cumulative damage degree is greater. The strain localization zones in different samples tend to propagate inward into the coal mass, ultimately leading to the formation of macroscopic tensile cracks either within the individual materials or across the interface. The study also identified the characteristic regional distributions of force chain fields and stress fields, revealing that changes in the fracture angle can cause a deflection of these characteristic regions, which significantly influences the interface constraint effect. The presence of fractures significantly alters the distribution of the ultimate strength of the coal and rock components within the conventional coal-rock combination structure.