基于强度折减有限元法的排土场边坡稳定性数值模拟研究  

Study on the stability of waste dump slopes based on the strength reduction finite element method

作　　者：邱振华[1] 陈光木[1] 黄春福[1] QIU Zhenhua;CHEN Guangmu;HUANG Chunfu(Dabao Mountain Mining Co.,Ltd.,Shaoguan Guangdong 512127,China)

机构地区：[1]广东省大宝山矿业有限公司,广东韶关512127

出　　处：《有色金属(矿山部分)》2025年第1期72-81,共10页NONFERROUS METALS(Mining Section)

基　　金：国家自然科学基金资助项目(52304202)。

摘　　要：以大宝山矿李屋排土场边坡为背景,旨在建立一种方法准确评价现状排土场的稳定性。为此,利用强度折减有限元法,分析了排土场边坡稳定性。首先,针对性制定李屋排土场边坡稳定性的强度折减有限元数值计算方案,并构建相关三维数值计算模型、设置数值计算参数;然后,模拟分析了排土场的设计边坡与现状边坡的应力、位移和塑性区的三维分布特征;最后,对排土场设计边坡和现状边坡的稳定性进行了对比分析,确立了现状边坡的稳定性。结果表明:现状排土场中应力分布规律与设计排土场一致,均呈现出随深度增大应力逐渐增大的规律,且均产生了较大范围的塑性区;但现状排土场的应力大小和塑性区范围均小于设计排土场。结果表明当前排土场稳定性较好。研究成果对排土场稳定性评价与安全控制具有重要参考意义。Taking the slope of Liwu waste dump in Dabaoshan Mine as the background,a method was established to accurately evaluate the stability of the current waste dump.The strength reduction finite element method was used to analyze the stability of the slope in the waste dump.Firstly,a targeted numerical calculation scheme for the stability of the Liwu waste dump slope was formulated using the Strength Reduction Finite Element Method.This involved constructing relevant three-dimensional numerical calculation models and setting numerical calculation parameters.Next,the stress,displacement and three-dimensional distribution characteristics of the designed slope and the current slope of the waste dump were simulated and analyzed.Finally,a comparative analysis of the stability of the designed slope and the current slope of the waste dump was conducted,and the stability of the current slope was established.The study revealed that the stress distribution pattern in the current waste dump was consistent with the designed waste dump,showing an increase in stress with depth,and both exhibited extensive plastic zones.However,the stress and plastic zone in the current waste dump were smaller than those in the designed waste dump,indicating good stability of the current waste dump.The research results have important reference significance for the stability evaluation and safety control of waste dump.

关 键 词：排土场边坡 稳定性 强度折减有限元法 露天矿山 数值计算 

分 类 号：TD216[矿业工程—矿井建设] TD854.6