基于强度折减法的韩城煤矿边坡稳定性分析
摘要:将有限元强度折减理论应用于边坡稳定性分析中,运用ANSYS大型有限元分析软件,基于Drucker-Prager(D-P)屈服准则,采用力和位移的收敛标准作为破坏判据,进行边坡的稳定性分析。当折减系数达到某一数值时,非线性有限元静力计算将不收敛,滑面上的位移将产生突变,边坡内一定幅值的广义剪应变自坡底向坡顶贯通,此时认为边坡已破坏,并定义此时的折减系数即为稳定系数。文中以韩城煤矿节理岩质边坡为例,运用该方法进行了稳定性分析并与并与传统的Bishop法、Janbu法等方法对比。计算结果表明,有限元强度折减法能更加真实地反映边坡的实际情况,求得的边坡稳定系数更接近边坡的实际稳定状态,显示出其在边坡稳定性分析中的一定优势。
Abstract:The finite element c-tanФ reduction theory is applied to the slope stability analysis, which is using ANSYS finite element analysis software, based on Drucker-Prager yield criterion, using force and displacement convergence criteria as the damage criterion to carry out the slope stability analysis. When the reduction coefficient reaches to a certain value, the non-linear finite element calculation will not converge, the displacement of the sliding surface will mutation, slope, within a certain amplitude of the generalized shear strain gradient from its base to the top, so the slope had been destroyed, the previous reduction factor shall be the stability factor. In the paper, taking the Hancheng coal jointed rock slope for example, applying the c-tanФ, reduction theory to its stability analysis. The results show that the FEM and strength - reduction method is more convenient and reasonable in the analysis of rock slope stability. It can reflect the actual slope state, and give stability factors that are closer to the actual ones.
中文标题：
基于强度折减法的韩城煤矿边坡稳定性分析
Stability Analysis of Slope in Hancheng Coal Mine Base on Strength-Reduction Method
作者：
王宇,田浩,余宏明
WANG Yu,TIAN Hao,YU Hongming
作者简介:王宇,1985年生,男,河北省沧州人,硕士研究生;研究方向:地质灾害评估,边坡及滑坡工程治理设计方面。E-mail:good541571889@126.com
通讯地址：
中国地质大学(武汉)工程学院, 湖北武汉 430074
SchoolofEngineering,ChinaUniversityofGeosciences,Wuhan430074,Hubei,China
中图分类号:U457
doi:10.3969/j.issn.1007-2993.2010.02.009
出版物：岩土工程技术
收稿日期:2009-12-17
网络出版日期:2021-07-06
关键词:岩质边坡,强度折减法,D-P屈服准则,稳定性分析,稳定系数
Key words:rock slope,strength-reduction method,Drucker-Prager yield criterion,stability analysis,safety factor
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