中文摘要：

层状岩质边坡的稳定性受坡高、坡角和结构面强度等多因素的影响,不同因素其影响程度不同。基于正交试验原理,对层状岩质边坡稳定性主要影响因素进行敏感性分析,得出影响因素排序为：边坡高度H〉坡角β〉结构面黏聚力C〉结构面内摩擦角φ〉岩体容重γ〉岩层倾角α〉滑块厚度h〉岩体黏聚力C′。对边坡有限元的精度问题进行探讨时,以典型单折线滑面的岩质边坡数值计算为例,分析计算模型的单元网格尺寸和边界条件对边坡稳定安全系数的影响规律,根据计算结果提出了数值模拟建议,用以提高已知滑动面岩质边坡数值计算的精度。结果表明：一般滑动面应用20~30个内界面单元或网格尺寸大致选用2~3m即可满足精度要求,在潜在滑动面以下至少有三~四层单元的过渡,使其过渡到固定支座边界。初步预测,为了防止波在界面反射,在边坡动力稳定分析中,因单元加密,单元尺寸应控制在λ/10~12（λ为波长）,加大模型范围。

英文摘要：

The stability of a layered rock slope is affected by many factors,such as slope height, slope angle, structural plane strength, and so on. The degrees of influence of such factors vary, and in most cases, depend on the comprehensive judgment generated from an actual engineering exploration. In an orthogonal experiment that features two main parameters （factors and levels）, a factor refers to the set of elements that may directly affect the results of a test and may be sin- gle or multiple. The level of factor refers to the specific value of the human factors in the experi- ment. This paper analyzes the sensitivity of the main factor, which affects the stability of the rock slope and determines the composition of the primary factor as follows： the slope height H〉slopeangle β〉structural surface cohesion C〉structural surface friction angle φ〉rock density γ〉the dip angle a α〉 block thickness h〉rock cohesion. Next, we discuss the efficiency of the finite element method in determining slope accuracy, which is also an important factor that can affect the stability of a slope. By taking the numerical calculation of the rock slope of a typical single line sliding surface as an example, the influences of element mesh size and boundary condition on the safety factor of slope stabili- ty is analyzed. Some numerical simulation suggestions are proposed according to the calculation results, and these suggestions are used to improve the accuracy of the numerical calculation of the known sliding surface rock slope. In general, the common sliding surface application of 20~30 in the interface unit is enough, and the mesh size is roughly set at 2--3 m to meet the accuracy requirements. We also find that the smaller the mesh size is, the longer the time required, although the safety factor only showed a slight change. There should be at least three or four layer elements under the potential sliding surface to ensure the transition to the fixed support boundary. According to the preliminary forecast, in order t