露天采矿技术2025，Vol.40Issue(2)：13-16,4.DOI:10.13235/j.cnki.ltcm.20240286
先锋露天矿北帮顺倾软岩边坡变形机理
Deformation mechanism of down-dip soft rock slope in north slope of Xianfeng Open-pit Mine
摘要
Abstract
Taking down-dip soft rock slope in north slope of Xianfeng Open-pit Mine as research object,based on strength reduction method and Mohr-Coulomb constitutive model,using CAD-Midas GTS NX modeling,this article systematically analyzes the characteristics of stress field and displacement field of the slope,and summarizes the mechanism of deformation instability and failure mode.The results show that the north slope exhibits remarkable shear slip characteristics under the influence of gravity stress and excavation unloading.The strata slip occurs in the middle and upper part of the rock mass,which compresses the foot of the slope and results in the shear failure of the penetrating structural plane.Slope deformation can be divided into three stages:the initial incubation stage is dominated by slow fracture development,the slip creep stage is marked by shear slip,and the shear instability stage is dominated by fracture penetration and rock mass failure.The development of weak layer,groundwater and weak sliding surface of downdip soft rock are the main facters of slope instability.关键词
软岩边坡/数值模拟/失稳机制/强度折减法/控制因素分析Key words
soft rock slope/numerical simulation/instability mechanism/strength reduction method/control factor analysis分类
矿山工程引用本文复制引用
王胆,马明红,蒋香莲,陈奇,林令鑫,李昊阳,李泽辰..先锋露天矿北帮顺倾软岩边坡变形机理[J].露天采矿技术,2025,40(2):13-16,4.基金项目
国家重点研发计划资助项目(2024YFC3013904) （2024YFC3013904）
