为研究充填材料类型对裂隙岩石力学特性及裂纹扩展演化的影响特征,对含充填正交裂隙花岗岩板状试样进行单轴压缩试验.结果表明:与单裂隙试样相比,含充填正交裂隙试样峰值强度和弹性模量明显劣化,劣化幅度分别为17.45%~39.19%和9.64%~27.42%.随充填材料强度的增加,充填试样峰值强度和弹性模量均逐渐增大.充填类型对试样次生裂纹的起裂形式影响显著,充填材料强度较低时,试样首先在充填物与次裂隙的交界面发生“脱黏”现象,然后由次裂隙外侧尖端开始起裂,而充填材料强度较高时可抑制次裂隙尖端裂纹萌生,试样初始破坏表现为主裂隙尖端的拉裂纹扩展.充填材料强度越大,充填试样的起裂应力越接近峰值强度,起裂应力水平越高.获得了充填试样轴向应力-应变曲线与次生裂纹扩展的实时关系,表明每一次较大的应力跌落均对应一条次生裂纹的萌生和扩展. In order to study the effect of filling material type on the mechanical properties of cracked rock and the evolution of crack propagation, uniaxial compression tests were carried out on the plate samples containing filled orthogonal fractured granite.The results show that compared with the single fracture samples, The peak strength and elastic modulus of the cracked specimens were significantly deteriorated, with the degradation ranges of 17.45% -39.19% and 9.64% -27.42%, respectively.With the increase of filling strength, the peak strength and elastic modulus of filled specimens increased gradually. The type has a significant effect on the initiation of the secondary cracks in the specimen. When the strength of the filling material is low, the specimen first “debonds” at the interface between the filling and the secondary fissure, and then starts from the outer tip of the secondary fissure Crack, while the filling material with high strength can inhibit crack initiation at the secondary crack tip, and the initial failure of the sample shows the crack propagation at the tip of the main crack.The larger the strength of the filling material, the closer to the peak strength the crack initiation stress of the filled sample The higher the level of crack stress, the real-time relationship between the axial stress-strain curve and the secondary crack propagation is obtained, which indicates that each large stress drop corresponds to the initiation and propagation of a secondary crack.