王杰,吕加贺,谭飞,刘礼领

• 1:中国地质大学(武汉)工程学院
• 2:中国电力工程顾问集团中南电力设计院有限公司

摘要(Abstract)：

为响应国家“绿水青山就是金山银山”的发展理念，对废弃矿坑的开发再利用成为热点，而采用合理的稳定性评价方法对废弃矿坑边坡加固设计是后续工作的关键。但这类矿坑边坡通常形状近似圆形或椭圆形，三维空间效应不容忽略，基于传统平面应变假设的简化方法对其进行稳定性分析似乎不太合理。在FLAC3D强度折减法的基础上，提出了一种针对近似圆形矿坑边坡稳定性分析的轴对称模型简化计算方法。基于计算结果的对比分析表明：(1)对于这种类似圆形凹坡，轴对称模型计算的安全系数比传统平面应变模型更准确，减少了计算时间，并且轴对称模型对于各种复杂程度不同的边坡类型同样适用；(2)轴对称模型计算的安全系数与三维模型计算的安全系数非常接近，而传统平面应变模型计算的安全系数偏于保守；(3)将轴对称模型计算结果与现有研究对比，表明两者结果相符，并将其进一步应用于长沙冰雪世界项目矿坑边坡加固工程的稳定性分析中，证明其可为类似工程的边坡稳定性评价提供参考。

关键词(KeyWords)： 矿坑边坡;FLAC3D;轴对称模型;平面应变模型

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金项目(51979253)

作者(Author): 王杰,吕加贺,谭飞,刘礼领

DOI: 10.19509/j.cnki.dzkq.tb20220284

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