重庆大学学报2024，Vol.47Issue(4)：22-33,12.DOI:10.11835/j.issn.1000.582X.2024.04.003
露天矿山岩质边坡软弱夹层赋存状态影响边坡稳定性规律研究
Influence of the occurrence state of soft interlayer on the rock slope of open-pit mine
摘要
Abstract
As a typical geological structure,a soft interlayer is a key factor affecting the safety and stability of the entire slope.In order to better analyze the properties of soft interlayers and their influence on slope stability,the orthogonal control method was used to simulate four occurrence states of the sandwich depth,inclination angle,quantity and structural surface spacing between the layers of the slope with a soft interlayer in a mine open-pit rock slope.A 4×4 orthogonal simulation was carried out and the stability and deformation law of the slope were revealed under different occurrence states.The results show that:1)the occurrence state of the soft and weak interlayer of the slope has a significant impact on the stability of the slope.The safety factor of the slope increases with the increase of the burial depth of the soft interlayer,and the safety factor tends to stabilize after the burial depth reaches a certain level.2)With the increase in the angle of the soft interlayer,the failure mechanism is manifested as interlayer mismotion,creep slip along the layer and progressive change of shear-slip along the soft structural surface.3)The increase in the number of soft interlayer layers leads to an overall decline in the slope with uneven deformation,a decrease in the safety factor of the slope,and an increase in horizontal displacement.4)For the soft sandwich slope with the same buried depth,structural surface spacing has less influence on the slope safety factor when the spacing is small.关键词
露天边坡/软弱夹层/赋存状态/安全稳定性/边坡变形Key words
open slopes/weak interlayer/endowment status/security and stability/slope deformation分类
矿业与冶金引用本文复制引用
樊鸿志,王光进,蓝蓉,刘明生..露天矿山岩质边坡软弱夹层赋存状态影响边坡稳定性规律研究[J].重庆大学学报,2024,47(4):22-33,12.基金项目
国家自然科学基金资助项目(52174114) （52174114）
国家磷资源开发利用工程技术研究中心开放基金资助项目(NECP2022-07).Supported by National Natural Science Foundation of China(52174114),and the Open Foundation of the National Engineering Research Center for Phosphorus Resources Development and Utilization(NECP2022-07). （NECP2022-07）
