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<p>To investigate the influence of fractures at different locations and with varying inclination angles at the same location on the mechanical properties and crack propagation of surrounding rock in roadways under biaxial loading, biaxial loading tests were conducted on large-scale samples of roadway surrounding rock. This study combines Digital Image Correlation and the 2D Discrete Element Method Particle Flow Code to analyze the deformation characteristics of roadway surrounding rock under biaxial loading conditions. It investigates the entire process of crack formation, propagation, and failure on the rock sample surface, elucidating the microcrack failure mechanisms of rock samples from a microscopic scale. The results indicate that: (1)The peak stress of roadway surrounding rock specimens is related to fracture angle and position; (2)The degree of damage in surrounding rock specimens is associated with fracture angle and position; (3)The failure mode and crack propagation type of surrounding rock specimens are correlated with fracture angle. Therefore, in practical engineering applications, the fracture angle and position can be used to determine the failure mechanical properties and crack propagation characteristics of roadway surrounding rock under biaxial compression conditions. This research provides new insights and methods for understanding rock failure mechanisms.</p>

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Effect of Fracture Location and Orientation on the Mechanical Behavior of Rock-Like Roadways Under Biaxial Compression

  • 期刊论文

  • 发表日期：

    2025年5月28日

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  • Xiaotong Du,
  • Wanrong Liu,
  • Chao Peng

摘要

To investigate the influence of fractures at different locations and with varying inclination angles at the same location on the mechanical properties and crack propagation of surrounding rock in roadways under biaxial loading, biaxial loading tests were conducted on large-scale samples of roadway surrounding rock. This study combines Digital Image Correlation and the 2D Discrete Element Method Particle Flow Code to analyze the deformation characteristics of roadway surrounding rock under biaxial loading conditions. It investigates the entire process of crack formation, propagation, and failure on the rock sample surface, elucidating the microcrack failure mechanisms of rock samples from a microscopic scale. The results indicate that: (1)The peak stress of roadway surrounding rock specimens is related to fracture angle and position; (2)The degree of damage in surrounding rock specimens is associated with fracture angle and position; (3)The failure mode and crack propagation type of surrounding rock specimens are correlated with fracture angle. Therefore, in practical engineering applications, the fracture angle and position can be used to determine the failure mechanical properties and crack propagation characteristics of roadway surrounding rock under biaxial compression conditions. This research provides new insights and methods for understanding rock failure mechanisms.