Parametric study of smooth joint parameters on the mechanical behavior of transversely isotropic rocks and research on calibration method

This paper aims to study the relationships between microscopic parameters of bedding planes and macroscopic characteristic of transversely isotropic rock using the bonded-particle discrete element models. The bedding planes were simulated by embedding smooth joint models within an area of certain thickness. A macro-microscopic parameters calibration method for transversely isotropic rocks was designed, which was able to adequately capture the essential anisotropic features of transversely isotropic rocks. Verification was conducted by taking Boryeong shale as an example to build the discrete element model and calibrate the parameters. The results were compared, demonstrating the accuracy and superiority of the calibration method.