摘要
含缓倾软弱夹层岩质边坡中,存在应力场、渗流场等多场相互作用。由于不同区域缓倾软弱夹层形成的地质条件和组成成分不同,导致软弱夹层力学参数各异,在渗流场和应力场耦合作用下软弱夹层力学性质相对于自然状态亦会产生变化,因此流固耦合作用下缓倾软弱夹层参数特征的研究成为边坡稳定性分析与治理工作中需要进一步研究的问题。为探求流固耦合作用下含缓倾软弱夹层典型相关参数对岩坡稳定性的影响程度,以四川省金顶黄山石灰石矿山边坡为研究对象,基于强度折减法和流固耦合理论对边坡进行稳定性分析,选取软弱夹层倾角、厚度、内摩擦角及黏聚力设计正交试验,并采用极差分析和单因素分析法对各参数在边坡稳定性分析中的敏感性进行研究。研究结果表明:在流固耦合作用下,软弱夹层厚度越大、黏聚力越高,边坡稳定性不一定越好;软弱夹层倾角越小、内摩擦角越大,边坡越趋向于稳定。
There are multi-field interactions such as stress field and seepage field in the rock slope with gently dipping soft interlayer. Due to the different geological conditions and compositions of the gently dipping weak interlayers in different regions,the mechanical parameters of the weak interlayers are different. The research on the parameter characteristics of the gently sloping weak interlayer under the action has become a problem that needs further research in the slope stability analysis and governance. In order to explore the influence degree of typical parameters of soft interlayers with gentle dip on rock slope stability under the action of fluid-solid coupling,the slope of Huangshan Limestone Mine in Jinding,Sichuan Province was taken as the research object. Based on the strength reduction method and the fluid-solid coupling theory,the stability of the slope is analyzed,and the inclination angle,thickness,internal friction angle and cohesion of the weak interlayer are selected to design the orthogonal test,and the range analysis and single factor analysis are used to study the sensitivity of each parameter in the slope stability analysis. The research results show that:under the action of fluid-structure interaction,the greater the thickness and the higher the cohesion of the weak interlayer,slope stability is not necessarily better;the smaller the inclination angle and the greater the internal friction angle of the weak interlayer,the more stable the slope is.
作者
杨启帆
胡斌
马利遥
刘霁
王泽祺
曹建军
YANG Qifan;HU Bin;MA Liyao;LIU Ji;WANG Zeqi;CAO Jianjun(School of Resources and Environmental Engineering,Wuhan University of Science and Technology,Wuhan 430081,China;Hubei Key Laboratory for Efficient Utilization and Agglomeration of Metallurgical Mineral Resources,Wuhan 430081,China)
出处
《金属矿山》
CAS
北大核心
2023年第2期196-202,共7页
Metal Mine
基金
国家自然科学基金重点项目(编号:U1802243)
武汉科技大学重大科技项目培育类创新团队(编号:2018TDX01)。
关键词
流固耦合
缓倾软弱夹层
正交试验
边坡稳定性
敏感性分析
fluid-structure interaction
slowly tilted weak interlayer
orthogonal test
slope stability
sensitivity analysis
