In the paper, through analysing the sensitivity of spacing, dip angle, included angle, and the number of joint sets versus anisotropy of rock quality designation, some anisotropic patterns of rock quality designation are discussed using net simulation of joints. 本文运用结构面网络模拟技术,通过结构面间距、倾角、相对夹角以及结构面组数的敏感性分析,探讨了RQD的各向异性规律。