| 师华鹏,占建琴,邓曦,王宏益.基于极限平衡法和强度折减法的危岩稳定性分析[J].矿产勘查,2024,15(5):872-883 |
| 基于极限平衡法和强度折减法的危岩稳定性分析 |
| Stability analysis of dangerous rock mass based on limit equilibrium method and strength reduction method |
| 投稿时间：2022-08-17 修订日期：2022-12-17 |
| DOI：10.20008/j.kckc.202405019 |
| 中文关键词: 陡倾结构面 地质调查 危岩体 稳定性分析 极限平衡法 强度折减法 |
| 英文关键词: steep structural planes geological survey dangerous rock mass stability analysis limit equilibrium method strength reduction method |
| 基金项目:本文受广西自然科学基金（2020GXNSFDA238024）与中国博士后科学基金（2019M663874XB）联合资助。 |
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| 中文摘要: |
| 为了分析评价陡倾结构面相互组合切割形成的危岩体的稳定性，本文以龙寺CIV-1边坡危岩体为例，根据地质调查数据，建立了危岩体的简化地质模型、失稳概化理论模型以及在冻胀、地震、水力等因素影响下的力学分析模型，利用极限平衡理论推导出了危岩体的滑移稳定性系数和倾覆稳定性系数的无量纲表达式，重点分析了不同工况下危岩体的稳定性，并借助UDEC强度折减法对危岩体的形成、破坏机理进行分析研究。结果表明：不同工况下的危岩稳定性为天然工况>地震工况>暴雨工况>组合工况；层面与陡倾结构面的组合关系以及陡倾结构面的贯通程度直接控制着危岩体的稳定性和破坏模式。通过极限平衡法和UDEC强度折减法相结合的危岩体稳定性评价方法，不仅可以通过简单的数学公式高效地获取危岩体的稳定性，还可以通过力与变形的信息，直观的辨别出危岩体易失稳的部位，为陡倾结构面切割形成的危岩提供防治参考。 |
| 英文摘要: |
| In order to analyze and evaluate the stability of dangerous rock mass formed by the combination of steep structural planes， we take the dangerous rock mass of Longsi CIV-1 slope as an example. According to the geological survey data， a simplified geological model of dangerous rock mass， a generalized theoretical model of instability， and a mechanical analysis model under the influence of factors such as frost heave， earthquake， and hydraulic power were established. The dimensionless expressions of the displacement stability coefficient and the overturning stability coefficient are used to analyze the stability of the dangerous rock mass， especially under different working conditions， and conduct analytical research on the formation and destruction mechanism of the dangerous rock mass by means of the UDEC strength reduction method. The results show that the stability of dangerous rock mass under different working conditions is natural working condition > earthquake working condition > rainstorm working condition > combination working condition， and the combination between bedding and steep structural planes and the degree of penetration of steep structural planes directly influence the stability and destructural mode of dangerous rock mass.The stability evaluation method of the dangerous rock mass combined with the limit equilibrium method and the UDEC strength reduction method can not only obtain the stability of the dangerous rock mass efficiently through simple mathematical formulas， but also intuitively identify the the parts of dangerous rock mass and provide references for the prevention of dangerous rock formed by cutting steep structural planes through force and deformation. |
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