针对结构面刚度参数的难点问题,利用离散元程序3DEC进行数值计算。通过岩石结构面直接剪切试验研究并结合理论分析,得到刚度参数表征经验公式,并采用三维离散元数值分析法对室内试验结果进行了验证。研究结果表明,利用数值试验能够得到与室内试验较为一致的结果,说明经验公式法选取的刚度参数能够较好地反映结构面剪切破坏前的变形特征。通过对Bandis经验公式重新引入修正函数f(τ/τp)后求得的剪切刚度Kst能够更好地反映剪切破坏前结构面的剪切变形特征。 According to the difficult problem of the stiffness parameter of structural plane, 3DEC is used to calculate the stiffness of the structural plane. The empirical formula of stiffness parameter characterization was obtained through direct shear test and theoretical analysis of rock structural plane, and the indoor test results were verified by three-dimensional discrete element numerical analysis. The results show that the numerical results agree well with those of in-house tests, and the stiffness parameters selected by the empirical formula method can well reflect the deformation characteristics of the structural plane before shearing failure. The shear stiffness Kst obtained after the correction function f (τ / τp) is reintroduced to the Bandis empirical formula can better reflect the shear deformation characteristics of the structural plane before the shear failure.