基于FLAC^(2D )、GPS监测和人工巡视相结合的某矿山排土场边坡稳定性分析  

Slope stability analysis of a mine drainage field based on the combination of FLAC^(2D),GPS monitoring and manual patrolling

作　　者：王文飞 杨志全[1,2,3] 孟祥瑞 王少宾 李睿 刘关雄 张丹丹 WANG Wenfei;YANG Zhiquan;MENG Xiangrui;WANG Shaobin;LI Rui;LIU Guanxiong;ZHANG Dandan(School of Land and Resource Engineering,Kunming University of Science and Technology,Kunming 650093,China;School of Public Safety and Emergency Management,Kunming University of Science and Technology,Kunming 650093,China;Key Laboratory of Early and Rapid Identification and Prevention and Control of Engineering Geological Hazards in High Intensity Earthquake Mountainous Traffic Corridor of Yunnan University,Kunming University of Technology,Kunming 650093;Jinhui Mining Company Limited,Longnan Gansu 742300,China;Gansu Jinhui Xinke Materials Co.,Ltd.,Longnan Gansu 742300,China;China Nonferrous Metal Industry Kunming Survey and Design Institute Co.,Ltd.,Kunming 650051,China)

机构地区：[1]昆明理工大学国土资源工程学院,昆明650093 [2]昆明理工大学公共安全与应急管理学院,昆明650093 [3]昆明理工大学云南省高校高烈度地震山区交通走廊工程地质病害早期快速判识与防控重点实验室,昆明650093 [4]金徽矿业股份有限公司,甘肃陇南742300 [5]甘肃金徽新科材料有限公司,甘肃陇南742300 [6]中国有色金属工业昆明勘察设计研究院有限公司,昆明650051

出　　处：《有色金属（矿山部分）》2023年第6期80-87,共8页NONFERROUS METALS(Mining Section）

基　　金：国家自然科学基金资助项目(41861134008);云南省阿瑟夫·汉院士工作站项目(202105AF150076);云南省重点研发计划项目(202003AC100002);云南省基础研究计划面上项目(202001AT070043)。

摘　　要：受矿山的不合理排放堆积、自然降雨冲刷以及地形等因素的影响,使得大面积的堆积型斜坡极易发生滑坡地质灾害,严重威胁矿山人员的生命财产安全。为了解决矿山排土场边坡失稳带来的潜在隐患,定期合理地开展矿山排土场边坡稳定性分析具有重要的作用。前人使用FLAC^(2D)解决一些边坡稳定性的研究较少,本文以某矿山拟建排土场边坡为研究对象,在现场调查的基础上,创新性地运用FLAC^(2D)软件进行数值模拟分析,定性和定量对排土场边坡三种不同工况(天然状态、7°地震、浸水)下的稳定性进行验算。同时,将GPS监测和人工巡视相结合,根据相关的GPS监测标准和人工巡视要求,给出了针对排土场边坡变形监测措施。结果表明:经定性、定量计算后,三种工况下的边坡稳定系数高于安全系数,达到了安全等级一级的要求,证明了拟建排土场的安全性和稳定性。该分析方法能为该矿其他排土场边坡稳定性分析提供借鉴。Influenced by unreasonable discharge accumulation of mines,natural rainfall erosion,topography,and other factors,it makes the large accumulation-type slopes extremely prone to landslides and other geological disasters,which seriously threaten the lives and property safety of mine personnel.To solve the potential hidden danger brought by the slope instability of the mine drainage field,it is important to carry out regular and reasonable slope stability analysis of the mine drainage field.Therefore,this paper takes the slope of a proposed mine drainage field as the research object and innovatively uses FLAC^(2D) software to conduct numerical simulation analysis on the basis of field investigation to qualitatively and quantitatively verify the stability of the slope of the drainage field under three different working conditions(natural state,7°earthquake and water immersion).At the same time,GPS monitoring and manual inspection are combined,and measures are given to monitor the slope deformation of the drainage site according to the relevant GPS monitoring standards and manual inspection requirements.The results show that after qualitative and quantitative calculations,the stability coefficients of the slopes under the three working conditions are higher than the safety coefficients and meet the requirements of safety level 1,which proves the safety and stability of the proposed drainage field.This analysis method can provide reference significance for the slope stability analysis of other soil disposal sites in the mine.

关 键 词：排土场边坡 FLAC^(2D) 稳定性分析 安全系数 工况 GPS监测 人工巡视 监测频率 

分 类 号：TD824.7[矿业工程—煤矿开采]