台州市羊平鸟尾矿库坝体稳定性分析

Stability Analysis of Dam Body of Yangpingniao Tailings Pond in Taizhou City

摘要: 尾矿坝的稳定性对于尾矿库运行安全至关重要，本文以台州市羊平鸟尾矿库为例，通过室内试验获得堆积层的基本物理力学参数，采用瑞典圆弧法和Geo-Studio软件，建立了尾矿库在正常、洪水和地震三种工况下的坝体模型，计算和分析了大坝的稳定性问题。分析结果为：瑞典圆弧法和Bishop法得到的安全系数均满足规范要求，具体表现为洪水工况条件下坝体处于稳定状态，在地震工况条件下坝体处于基本稳定状态。

Abstract: The stability of the tailings dam is very important for the operation safety of the tailings pond. This paper takes Yangpingniao tailings pond in Taizhou City as an example. The basic physical and mechanical parameters of the accumulation layer were obtained through laboratory tests, and the finite element calculation model of the tailings dam under normal, flood and seismic conditions was established by using the Swedish strip division method and Geo-Studio software, and the stability of the dam was calculated and analyzed. The results show that the safety factors obtained by the Swedish strip division method and the Bishop method meet the requirements of the code, which is manifested in the stable state of the dam under flood conditions and the basic stable state under seismic conditions.