基于监测和数值模拟的白音华凸台边坡变形稳定性分析

Deformation stability analysis of Baiyinhua convex slope based on field monitoring and numerical simulation

因采矿权原因白音华三号露天矿东北部形成了三面解除约束的凸台状边坡,凸台边坡的稳定性严重影响并制约着矿山的安全高效生产。本文采用GPS现场监测与三维数值模拟相结合的方法,首先开展了采动条件下凸台边坡变形稳定性的现场监测和三维数值模拟对比分析研究,数值模拟结果与现场监测数据吻合较好。进一步探究了凸台边坡南侧回填和北侧开采对凸台边坡变形的影响。研究表明,凸台前端及边坡底部变形较大,凸台边坡没有产生明显的贯通性剪切变形,随着凸台边坡南侧回填和北侧煤炭开采,凸台边坡前端变形量逐渐减小,主要变形区域逐渐向凸台边坡东帮移动。本文研究工作及时有效地对边坡稳定性进行评价并为边坡变形治理提供参考。

The convex slope with three unconstrained sides is formed in the northeast of Baiyinhua No.3 Open-Pit Mine due to mining reasons.The stability of the convex slope seriously affects and restricts the safe and efficient production of the open-pit mine.In this paper,GPS field monitoring and three-dimensional numerical simulation are combined to comparatively analyze the deformation stability of the convex slope under mining conditions.The numerical simulation results are in good agreement with the field monitoring data.The influence of the south side backfilling and the north side mining on the deformation of the convex slope is further studied.The research show that the deformation of the head of the convex and the bottom of the slope is large,and the convex slope does not produce obvious penetrating shear deformation.With the back filling of the south side of the convex slope and the mining of the north slide,the deformation of the front end of the boss slope decreases gradually,and the main deformation area will move to the east side of the convex slope.In this paper the stability of slope is evaluated effectively and timely,and the treatment of slope deformation can be referenced.The work presented in this paper can effectively and timely evaluate the slope stability and provide a reference for the deformation control of the slope.