中文摘要：

通过系统分析双向节理岩质边坡的工程破坏现象,总结了影响稳定性的5大因素：节理间距、节理摩擦角、节理倾角角度差、开挖坡脚以及块体的内摩擦角。运用UDEC离散元数值模拟方法和强度折减法作为边坡安全稳定性评判方法,利用上述5大因素构建正交试验方案,系统研究5大因素对双向节理岩质边坡稳定性的影响。最后运用灰色关联法分析了5大影响因素对双向节理岩质边坡稳定性的影响权重,结果表明：5大影响因素中权重最大的是块体内摩擦角和节理摩擦角,而节理倾角差、节理间距、坡体开挖角度对边坡稳定的影响力较小,因此在工程中需要着重关注块体内摩擦角和节理摩擦角的取值。

英文摘要：

By analyzing practical failures of two-way jointed rock slope,five elements were found to be the main factors affecting the slope stability,such as joint spacing,joint friction angle,jointed inclination angle difference,excavation slope angle, and angle of block internal friction. Based on an orthogonal experiment,the influence of above five elements to the slope stability was discussed by using UDEC discrete element method and strength reduction method. Then,a gray correlation analysis method was used to analyze the impact weight of the five factors. Results showed that block internal friction angle and joints friction angle were the two factors with great impacts,and the impacts of other three factors were much less,thus it should be paid more importance in practical engineering.