边坡稳定性分析一直是岩土工程领域重要的研究课题，在工程实践中占据相当重要的地位。影响边坡稳定性的因素主要有边坡体自身的物理力学性质、形状和尺寸、边坡的工作条件和加固措施。山西晋城地区是一个多山区域，大量的工程活动作用在有限的区域内使这一带出现了很多的土质垂直高边坡，如何更好地对这些土质垂直高边坡进行稳定性评价成为一个棘手的问题。传统的边坡稳定性分析方法虽然取得了很大的成就，但在土质垂直高边坡的稳定性评价方面还有待进一步完善，而数值模拟具有直观、快捷的优点。因此，将传统土力学计算方法和数值模拟相结合会更适合于土质垂直高边坡的研究。 本文以山西港华煤层气有限公司晋城煤层气液化厂的土质垂直高边坡为研究对象，通过分析该边坡的主要影响因素，选取传统土力学中计算边坡安全系数常用的三种方法——瑞典法、简化毕肖普法、剩余推力法分别对该边坡进行稳定性计算，得出该边坡的稳定系数。再应用ANSYS建立数值模型，导入FLAC3D进行数值模拟，分析云图和安全系数，确定出该边坡的稳定性，并结合现场边坡的实际情况得出土质垂直高边坡的破坏模式为崩塌破坏，对比传统土力学方法对土质垂直高边坡安全系数及其稳定性进行了进一步的评价。研究成果为该地区的其它土质垂直高边坡的稳定性评价提供了一定的借鉴意义。

Slope stability analysis has been an important subject in the field of geological engineering, which occupy an important position in engineering practice. The main factors which affect the slope stability include the physical and mechanical properties of the slope, the shape and size, working conditions and reinforcement measures of the slope. Jincheng is a mountainous area, a large number of engineering activities in limited areas make a lot of soil vertical slope appear. How to evaluate the stability of the vertical slope of the soil preferably is a thorny issue. The traditional methods of slope stability analysis have made great achievements. The numerical simulation has the advantage of visual fast. However, evaluation of the stability of vertical high soil slope should be further improved. Therefore, combining the traditional method of soil mechanics and numerical simulation of soil would be more suitable for the research of vertical high soil slope. A stability coefficient is obtained in this paper by analyzing the main factors which affect the slope，and calculating the slope stability after selecting three methods commonly used of calculating the slope safety coefficient in traditional soil mechanics——Swedish method, Bishop method, residual thrust method, in the study object of vertical high soil slope of Hong Kong and China Coalbed Methane Co., Ltd. Jincheng of Shanxi coalbed methane liquefaction plant. And then a numerical model which is established by ANSYS, is led into the FLAC3D for numerical simulation. The stability of the slope is determined after analyzing the cloud map and the safety coefficient. The conclusion that the destroyer mode of vertical high soil slope is collapse damage is drawn by combining with the actual situation on-site of the slope. Compared with the traditional method of soil mechanics, the safety coefficient and stability of vertical high soil slope is evaluated. The research achievements provide reference for evaluation of stability of other vertical high soil slope in this area.