基于正交及灰色关联分析对含断层边坡影响性分析
Impact analysis of fault-bearing slope based on orthogonal and grey correlation analysis
陈文倩 1陈俊智 1任春芳 1王昊 1王鸿2
作者信息
- 1. 昆明理工大学 国土资源工程学院,昆明 650093
- 2. 新平鲁电矿业有限公司,昆明 650032
- 折叠
摘要
为研究断层的空间位置对露天矿边坡的破坏特征,以大兰池露天矿为例,应用FLAC3D数值模拟软件进行模拟计算,选取断层与坡顶面距离、断层厚度、断层面与边坡临空面距离三个空间位置因素.通过改变各因素的数值,得到在不同的因素数值下断层空间位置对边坡产生的破坏特征规律,并通过正交试验法与灰色关联对3个空间位置因素对边坡稳定性影响的敏感性进行排序.结果表明:断层位于坡底面水平线之上时,断层与坡顶面距离越小,边坡滑动破坏越明显,断层位于坡底面水平线之下时滑动破坏不明显;随着断层厚度的增加,断层破碎带内部区域塌陷越明显,但对边坡完整岩体的破坏变化不明显;断层面与边坡临空面距离小于50 m时,边坡在坡底面出现"底鼓现象",断层面与边坡临空面距离大于50 m时,边坡在终了边坡坡面底部岩体出现明显的隆起.
Abstract
In order to study the damage characteristics of fault spatial position on the open pit slope,taking the open pit mine as an example,FLAC 3D numerical simulation software was used for simulation calculation.The distance between the fault and the slope top surface,fault thickness and the distance between the fault surface and the slope free surface were selected.By changing the value of each factor,the damage characteristics of fault spatial position on slope under different factor values were obtained,and the sensitivity of three spatial position factors on slope stability was ranked by orthogonal experiment and gray correlation.The results showed that when the fault is located above the horizontal line of the slope bottom surface,the smaller the distance between the fault and the slope top surface,the more obvious the sliding damage of the slope.And when the fault is located below the horizontal line of the slope bottom surface,the sliding failure is not obvious.With the increase of the thickness of the fault,the collapse of the internal area of the fault fracture zone is more obvious,but the damage to the complete rock mass of the slope is not obvious.When the distance between the fault surface and the slop free surface is less than 50 m,the"bottom drum phenomenon"appears on the bottom of the slope.And when the distance between the fault surface and the slope free surface is more than 50 m,the slope has obvious uplift at the bottom of the slope at the end of the slope.
关键词
边坡稳定性/断层空间位置/灰色关联分析法/正交试验/敏感性研究Key words
slope stability/fault space position/gray correlation analysis/orthogonal experiment/sensitivity study引用本文复制引用
出版年
2025
NETL
NSTL
万方数据