影响矿山边坡稳定性的软弱夹层蠕变参数分析  

Analysis of Creep Parameters of Weak Interlayer Affecting Stability of Mine Slope

作　　者：崔阿能 侯宜峰 黄洁 CUI A'neng;HOU Yifeng;HUANG Jie(Sinosteel Maanshan General Institute of Mining Research Co.,Ltd.;State Key Laboratory of Safety and Health for Metal Mines)

机构地区：[1]中钢集团马鞍山矿山研究总院股份有限公司,安徽省马鞍山市243000 [2]金属矿山安全与健康国家重点实验室

出　　处：《现代矿业》2024年第10期111-115,共5页Modern Mining

摘　　要：针对软弱夹层蠕变特性对矿山边坡整体稳定性的影响,使用FLAC^(3D)有限差分软件,分别采用Mohr-Coulomb模型和Burgers模型,对四川黄山石灰石矿山边坡稳定性进行分析。以坡脚处为特征点,考虑计算得出的软弱夹层蠕变特性的水平位移是不计蠕变的6.36倍,说明软弱夹层的蠕变特性对边坡的变形影响很大。分别对Burgers蠕变模型中η_(K)和η_(M)进行分析,经历相同的蠕变时间(150 d),η_(K)越小,边坡滑带剪应变速率增量越大,表明η_(K)影响岩体变形的减速蠕变周期和进入等速蠕变的时间;η_(K)和η_(M)分别增大一个数量级,特征点的水平位移增量分别为6.5%和1.93%,说明黏性系数影响蠕变变形的过程,但对蠕变变形值影响极小。Aiming at the influence of creep characteristics of weak interlayer on the overall stability of mine slope,the stability of Huangshan Limestone Mine slope in Sichuan Province was analyzed by using FLAC^(3D)finite difference software,Mohr-Coulomb model and Burgers model respectively.Taking the toe of the slope as the characteristic point,the horizontal displacement considering the creep characteristics of the weak interlayer is 6.36 times that of the creep,indicating that the creep characteristics of the weak interlayer have a great influence on the deformation of the slope.Theη_(K)andη_(M)in the Burgers creep model are analyzed respectively.After the same creep time(150 d),the smaller theη_(K),the greater the shear strain rate increment of the slope slip zone,indicating thatη_(K)affects the deceleration creep cycle of rock mass deformation and the time to enter constant creep.Theη_(K)andη_(M)increase by an order of magnitude,and the horizontal displacement increments of the feature points are 6.5%and 1.93%,respectively,indicating that the viscosity coefficient affects the process of creep deformation,but has little effect on the creep deformation value.

关 键 词：软弱夹层 蠕变参数 数值模拟 矿山高边坡 

分 类 号：TD876.3[矿业工程—非金属矿开采]