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在伺服控制单轴加载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.
Under the servo-controlled uniaxial loading system, two pre-fabricated rock through-the-rock materials were loaded to investigate the effect of prefabricated crack dip and rockfill inclination on the rock-through mode. Comparing the experimental results with the numerical results, it was found that with the pre- And the change of rock bridge inclination angle, the crack body shows the failure of prefabricated crack and the crack propagation of single crack wing. When the prefabricated crack of the crack body passes through, the influence of the rockfontaine angle on the mode of micro-crack through failure of the crack body is related to the crack angle ; When the fracture angle is larger (≥75 °), the effect of rock slope inclination is insignificant; when the fracture angle is small (≤75 °), the influence of rock slope inclination is more and more serious; The prefabricated fissure angle is smaller (25 °) and the rockfill angle is less (≤45 °), and the fissure body shows the phenomenon of single fissure wing crack propagating through and destroying. When the fissure body is damaged, the prefabricated fissure tip mainly develops the wing crack and secondly Students coplanar crack.