为了探究破碎性地层井壁失稳机理及其加固方法，对地面露头采集的均质藻云岩岩样进行切割，使其带有不同裂缝属性，再利用加固材料对裂缝面进行加固，最后对加固后岩样开展单轴压缩试验与直剪试验，评价不同裂缝属性、加固材料对裂缝面属性的影响。实验结果表明：对不同裂缝属性的岩样进行加固，会产生较为明显的差异性，其差异性的主控因素是裂缝倾角，含0°裂缝岩样加固效果最好，含60°裂缝岩样加固效果最差。裂缝面粗糙程度也会影响加固效果，粗糙裂缝面的加固效果要优于光滑裂缝面。加固材料的不同也会影响加固效果，水泥浆的加固效果优于乳液和AB胶。在钻进过程中，需考虑裂缝面属性与加固材料的相互作用，从而保证井下作业安全高效地进行。研究结果可为井壁加固、提高井壁稳定性提供参考。

In order to explore the mechanisms of wellbore instability in fractured formations and investigate reinforcement methods, homogeneous algal limestone samples collected from surface exposures were used to investigate the effects of different fracture attributes and reinforcement materials. The results show that reinforcing rock samples with various fracture attributes results in significant differences, with fracture inclination being the primary controlling factor. Specifically, samples with 0° fractures exhibit the best reinforcement effect, while those with 60° fractures demonstrate the worst. Additionally, the roughness of the fracture surface influences the reinforcement outcome, with rougher surfaces performing better than smoother ones. Furthermore, the choice of reinforcement material also affects the reinforcement effect, with cement grout outperforming emulsions and AB adhesives. It is concluded that, during drilling operations, careful consideration of the interaction between fracture surface attributes and reinforcement materials is essential to ensure the safe and efficient progress of underground work. The findings of this study offer valuable insights for wellbore reinforcement and enhancing wellbore stability.