中文摘要：

在伺服控制单轴加栽系统下对预制两条贯通裂隙类岩石材料进行加载试验，探索预制裂隙倾角和岩桥倾角对岩桥贯通模式的影响规律．对比实验与数值分析结果发现：随预制裂隙倾角及岩桥倾角的变化，裂隙体呈现出预制裂隙贯通破坏与单裂隙翼裂纹扩展贯通破坏；裂隙体预制裂隙发生贯通破坏时，岩桥倾角对裂隙体微裂纹贯通破坏模式的影响与裂隙倾角有关；裂隙倾角较大时（≥75°），岩桥倾角的影响不明显；裂隙倾角较小时（≤75°），岩桥倾角的影响越来越大，预制裂隙倾角45°附近影响最为显著；预制裂隙倾角较小（25°），岩桥倾角不大时（≤45°），裂隙体呈现出单裂隙翼裂纹扩展贯通破坏现象．裂隙体破坏时，预制裂隙尖端主要发育翼形裂纹和次生共面裂纹．

英文摘要：

In the system of uniaxial loading with servo control, the experiment of uniaxial loading on the rock-lick materials with two prefabricated-connected fissures was made, aiming to explore the rules of the pattern of rock-bridge coalescence under the influence of the dip of the prefabricated fissures and rock-bridge. By comparing the results of experiment and numerical analysis, we found that： the fissure-body present the transfixion failure of the prefabricated fissures and the transfixion failure of wing cracks generated at the tip of a single fissure. When the transfixion failure of the prefabricated fissures appeare, the influence on the pattern of rock-bridge coalescence, which is made by the angle of rock-bridge, has relationship with the dip of fissures. When the dip of fissures is big, the influence of the rock-bridge is not significant, and when it is small, the influence is more and more great. When the dip of fissures is about 45°, the influence is the most significant. When the fissure-body has smaller fissure dip （25°） and rock-bridge angle （≤45°）, the transfixion failure occurre, caused by the coalescence of wing cracks which generated at the tip of a single fissure. And during the failure process of the fissure-body, the wing crack and secondary co-plane crack are the main cracks at the tips of the prefabricated fissures.