[1]王建明,岳星彤,李天龙,等.露天矿边坡岩体裂隙测量与卸荷破坏的数值模拟研究*[J].中国安全生产科学技术,2022,18(8):98-105.[doi:10.11731/j.issn.1673-193x.2022.08.015]
WANG Jianming,YUE Xingtong,LI Tianlong,et al.Numerical simulation study on fracture measurement and unloading failure of slope rock mass in open-pit mine[J].JOURNAL OF SAFETY SCIENCE AND TECHNOLOGY,2022,18(8):98-105.[doi:10.11731/j.issn.1673-193x.2022.08.015]
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露天矿边坡岩体裂隙测量与卸荷破坏的数值模拟研究*
WANG Jianming,YUE Xingtong,LI Tianlong,et al.Numerical simulation study on fracture measurement and unloading failure of slope rock mass in open-pit mine[J].JOURNAL OF SAFETY SCIENCE AND TECHNOLOGY,2022,18(8):98-105.[doi:10.11731/j.issn.1673-193x.2022.08.015]
《中国安全生产科学技术》[ISSN:1673-193X/CN:11-5335/TB]
- 卷:
- 18
- 期数:
- 2022年8期
- 页码:
- 98-105
- 栏目:
- 职业安全卫生管理与技术
- 出版日期:
- 2022-08-31
文章信息/Info
- Title:
- Numerical simulation study on fracture measurement and unloading failure of slope rock mass in open-pit mine
- 文章编号:
- 1673-193X(2022)-08-0098-08
- 分类号:
- X936；TU452
- 文献标志码:
- A
- 摘要:
- 为探究露天矿不同高度边坡卸荷破坏模式的异同，以辽宁鞍山大孤山铁矿某岩质边坡为背景，利用边坡岩体内优势裂隙组产状、迹长和密度等随机分布参数，构建与边坡结构面具有相似分布规律的二维网络模型，借助PFC数值计算软件，探讨不同开采水平下坡体位移场和裂隙发展的时空演化规律以及边坡的破坏模式。研究结果表明：在边坡开挖过程中，出现的裂隙以张拉裂隙为主；裂隙主要出现在靠近坡面一定范围内，从坡面向里，裂隙数量减小，裂隙初始出现在坡脚区域，而后向坡顶发展；边坡开挖后，水平位移由负变为正，且突然增大，而后呈现阶跃型增长；边坡水平和竖向位移最大值发生在坡脚区域和靠近坡面位置，远离坡面，位移逐渐减小。
- Abstract:
- In order to investigate the similarity and difference of unloading failure patterns of the slopes with different heights in the open-pit mines,a rocky slope in Daguoshan iron mine in Anshan of Liaoning province was used as the background.Using the random distribution parameters such as the occurrence,trace length and density of the dominant fracture group in the slope rock mass,a two-dimensional network model with similar distribution law to the slope structural plane was constructed.With the help of PFC numerical calculation software,the spatial and temporal evolution laws of slope displacement field and fracture development and failure patterns of slopes under different mining levels were explored.The results showed that the fractures appearing in the excavation process of slope were mainly tension fractures.The fractures mainly appeared in a certain range near the slope surface,and the number of fractures decreased from the slope surface to the inside,and the fractures initially appeared at the foot of slope,and then developed toward the top of slope.After the excavation of slope,the horizontal displacement changed from negative to positive and increased suddenly,and then presented a step-type growth.The maximum horizontal and vertical displacement of the slope occurred at the foot of slope and near the slope surface,and the displacement decreased gradually away from the slope surface.
参考文献/References:
［1］李春元,张勇,彭帅,等.深部开采底板岩体卸荷损伤的强扰动危险性分析［J］.岩土力学,2018,39(11):3957-3968.
LI Chunyuan,ZHANG Yong,PENG Shuai,et al.Strong disturbance hazard analysis of unloading damage for floor rock mass in deep coal mining［J］.Rock and Soil Mechanics,2018,39(11):3957-3968.
［2］钱七虎.岩爆、冲击地压的定义、机制、分类及其定量预测模型［J］.岩土力学,2014,35(1):1-6.
QIAN Qihu.Definition,mechanism,classification and quantitative forecast model for rockburst and pressure bump ［J］.Rock and Soil Mechanics,2014,35(1):1-6.
［3］SHEMYAKIN E I,FISENKO G L,KURLENYA M V,et al.Zonal disintegration of rocks around underground workings,Part 1:Data of in situ observations［J］.Soviet Mining,1986,22(3):157-168.
［4］王瑞红,李建林,蒋昱州,等.峰前卸荷对节理岩体力学特性影响试验研究［J］.岩土力学,2014,35(4):972-976，985.
WANG Ruihong,LI Jianlin,JIANG Yuzhou,et al.Experimental research on mechanical property of jointed rock mass unloading before peak［J］.Rock and Soil Mechanics,2014,35(4):972-976，985.
［5］郑青松,刘恩龙,刘明星.三轴试验下结构面倾角对制备岩样力学特性的影响［J］.岩土力学,2019,40(5):1854-1861，1868.
ZHENG Qingsong,LIU Enlong,LIU Mingxing.Influence of dip angle of structural planes on mechanical properties of artificial rock samples under triaxial test conditions［J］.Rock and Soil Mechanics,2019,40(5):1854-1861，1868.
［6］陈国庆,刘辉,秦昌安,等.中部锁固岩桥三轴加卸荷力学特性及裂纹扩展研究［J］.岩石力学与工程学报,2017,36(5):1162-1173.
CHEN Guoqing,LIU Hui,QIN Chang’an,et al.Mechanical properties and crack model of central rock bridge in triaxial unloading test［J］.Chinese Journal of Rock Mechanics and Engineering,2017,36(5):1162-1173.
［7］宋彦琦,李名,王晓,等.基于高速摄影的单预制裂纹大理岩加卸载试验［J］.中国矿业大学学报,2014,43(5):773-781.
SONG Yanqi,LI Ming,WANG Xiao,et al.Observation of marble with single pre-existing crack using high-speed photography under loading and unloading conditions［J］.Journal of China University of Mining and Technology,2014,43(5):773-781.
［8］黄达,黄润秋.卸荷条件下裂隙岩体变形破坏及裂纹扩展演化的物理模型试验［J］.岩石力学与工程学报,2010,29(3):502-512.
HUANG Da，HUANG Runqiu.Physical model test on deformation failure and crack propagation evolvement of fissured rocks under unloading［J］.Chinese Journal of Rock Mechanics and Engineering,2010,29(3)：502-512.
［9］王建明,陈忠辉,周子涵,等.不同卸荷速率下节理岩桥变形破坏及裂隙扩展演化试验研究［J］.矿业科学学报,2020,5(4):382-392.
WANG Jianming,CHEN Zhonghui,ZHOU Zihan,et al.Experimental study on deformation failure and crack propagation evolvement of jointed rock bridge under different unloading rates［J］.Journal of Mining Science and Technology,2020,5(4):382-392.
［10］WANG Z Y,GUO D M,ZHANG W G.Influence of excavation schemes on slope stability:ADEM［J］.Journal of Mountain Science,2020,17(6):236-249.
［11］JIANG T,SHEN Z,YANG M,et al.A new model approach to predict the unloading rock slope displacement behavior based on monitoring data［J］.Structural Engineering and Mechanics,2018,67(2):105-113.
［12］冷先伦,盛谦,廖红建,等.反倾层状岩质高边坡开挖变形破坏机理研究［J］.岩石力学与工程学报,2004(S1):4468-4472.
LENG Xianlun,SHENG Qian,LIAO Hongjian,et al.Analysis on deformation and failure mechanism of high antidip sandwich rock slope in excavation［J］.Chinese Journal of Rock Mechanics and Engineering,2004(S1):4468-4472.
［13］李韬,徐奴文,戴峰,等.白鹤滩水电站左岸坝肩开挖边坡稳定性分析［J］.岩土力学,2018,39(2):665-674.
LI Tao,XU Nuwen,DAI Feng,et al.Stability analysis of left bank abutment slope at Baihetan hydropower station subjected to excavation［J］.Rock and Soil Mechanics,2018,39(2):665-674.
［14］李新坡,何思明.节理岩质边坡破坏过程的PFC2D数值模拟分析［J］.四川大学学报(工程科学版),2010,42(S1):70-75.
LI Xinpo,HE Siming.Numerical analysis of the failure of heavily jointed rock slopes using PFC2D［J］.Journal of Sichuan University(Engineering Science Edition),2010,42(S1):70-75.
［15］尹小涛,郑亚娜,马双科.基于颗粒流数值试验的岩土材料内尺度比研究［J］.岩土力学,2011,32(4):1211-1215.
YIN Xiaotao,ZHENG Ya’na,MA Shuangke.Study of inner scale ratio of rock and soil material based on numerical tests of particle flow code［J］.Rock and Soil Mechanics,2011,32(4):1211-1215.
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备注/Memo
- 备注/Memo:
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收稿日期： 2021-10-25；网络首发日期： 2022-08-03
* 基金项目： 国家自然科学基金项目（52074292）;国家重点研发计划项目（2017YFC1503103）
作者简介： 王建明，博士，工程师，主要研究方向为边坡工程。
