The distribution characteristics and evolution law of rock mass fissures induced by mining are a key scientific issue in the study of deep rock mechanics. In this study, a series of uniaxial compression experiments was conducted on rock-like specimens containing double V-shaped prefabricated fissures at dip angles of α = β = 45°, α = 45°<β = 60°, α = β = 60°, and α = 60°<β = 75° with a rock mechanics servo-controlled testing system. According to the experimental results, the effects of the dip angles of the double V-shaped prefabricated flaws with the same area on the mechanical parameters and fracturing process of the specimens were analysed in detail. Additionally, the crack initiation stress presented a nearly linear growth trend, which is generally similar to that of the crack peak stress with increasing flaw dip angle. By applying photographic monitoring to the crack initiation, propagation, coalescence, and failure modes in rock-like specimens, it was easily seen that the V-shaped flaw properties slightly influence the crack initiation positions but significantly influence the crack trajectories. The crack failure modes can be summarized into two distinct types. The study reported herein can provide a better understanding of the evolution of double V-shaped prefabricated fissures induced by coal mining.

采矿引起的岩体裂隙的分布特征和演化规律是深部岩石力学研究中的关键科学问题。在这项研究中，对包含双V形预制裂缝的岩石样试样进行了一系列单轴压缩实验，其倾角为α  =  β  = 45°，α  = 45°< β  = 60°，α  =  β  = 60 °，且α  = 60°< β = 75°，带有岩石力学伺服控制的测试系统。根据实验结果，详细分析了相同面积的双V形预制缺陷的倾角对试样力学参数和断裂过程的影响。此外，裂纹萌生应力呈现出几乎线性的增长趋势，这通常与裂纹峰值应力随裂纹倾角增加而相似。通过对岩石样的裂纹萌生，扩展，聚结和破坏模式进行照相监控，可以很容易地看出，V形缺陷特性对裂纹萌生位置的影响很小，但对裂纹轨迹的影响却很大。裂纹破坏模式可以概括为两种不同的类型。