频繁动力扰动对围压卸载中高储能岩体的动力学影响

唐礼忠 刘昌 王春 陈英毅 申帆

唐礼忠, 刘昌, 王春, 陈英毅, 申帆. 频繁动力扰动对围压卸载中高储能岩体的动力学影响[J]. 爆炸与冲击, 2019, 39(6): 065202. doi: 10.11883/bzycj-2018-0137
引用本文: 唐礼忠, 刘昌, 王春, 陈英毅, 申帆. 频繁动力扰动对围压卸载中高储能岩体的动力学影响[J]. 爆炸与冲击, 2019, 39(6): 065202. doi: 10.11883/bzycj-2018-0137
TANG Lizhong, LIU Chang, WANG Chun, CHEN Yingyi, SHEN Fan. Dynamic influence of frequent dynamic disturbance on high-energy rock mass during confining pressure unloading[J]. Explosion And Shock Waves, 2019, 39(6): 065202. doi: 10.11883/bzycj-2018-0137
Citation: TANG Lizhong, LIU Chang, WANG Chun, CHEN Yingyi, SHEN Fan. Dynamic influence of frequent dynamic disturbance on high-energy rock mass during confining pressure unloading[J]. Explosion And Shock Waves, 2019, 39(6): 065202. doi: 10.11883/bzycj-2018-0137

频繁动力扰动对围压卸载中高储能岩体的动力学影响

doi: 10.11883/bzycj-2018-0137
基金项目: 国家自然科学基金(51474250);中央高校基本科研业务费专项(2018zzts721,2018zzts212);河南省高校重点科研(18A440014);河南理工大学博士基金(672707)
详细信息
    作者简介:

    唐礼忠(1963- ),男,博士,教授,lztang11@csu.edu.cn

  • 中图分类号: O347.3; TU452

Dynamic influence of frequent dynamic disturbance on high-energy rock mass during confining pressure unloading

  • 摘要: 基于冬瓜山铜矿深部巷道围岩开挖过程中面临的高应力和频繁爆破扰动问题,利用改进的SHPB动静组合加载系统,开展了频繁动力扰动对围压卸载中高储能岩体动力学影响的研究。研究结果表明,围压卸载中的矽卡岩受到动力扰动时,其动态峰值应力和弹性模量随动力扰动次数非线性变化。围压卸载中的高储能矽卡岩受到动力扰动时会释放能量。轴压促使岩样内微裂隙轴向发育,造成岩样抵抗动力扰动能力减弱;围压减缓岩样内微裂隙轴向发育,造成岩样抵抗动力扰动能力增强。动力扰动对微裂隙扩展有促进作用,使围压卸载中的岩样由拉伸破坏向剪切破坏转变。
  • 图  1  动静组合系统结构示意图

    Figure  1.  Structural diagram of dynamic and static combination system

    图  2  频繁扰动下矽卡岩动态应力应变曲线

    Figure  2.  Dynamic stress-strain curves of skarn under frequent disturbances

    图  3  动态峰值应力与冲击次数的关系

    Figure  3.  Relationship between peak dynamic stress and impact times

    图  4  切线弹性模量与冲击次数的关系

    Figure  4.  Relationship between tangent elastic modulus and number of impacts

    图  5  岩样体积能耗与冲击次数的关系

    Figure  5.  Relationship between energy consumption per unit volume of rock and number of impacts

    图  6  矽卡岩最终破坏形态

    Figure  6.  Final destruction modes of skarn

    表  1  实验方案

    Table  1.   Experimental plan

    岩样 预加轴压
    /MPa
    预加围压
    /MPa
    冲击时围压
    /MPa
    围压卸载速率
    /(MPa·s−1)
    冲击气压
    /MPa
    XK1-1 62.5 15 7.5 1 0.6
    XK1-2 20 10
    XK2-1 72.5 15 7.5 1 0.6
    XK2-2 20 10
    XK3-1 82.5 15 7.5 1 0.6
    XK3-2 20 10
    下载: 导出CSV

    表  2  矽卡岩三轴压缩实验结果

    Table  2.   Triaxial compression experimental results for skarn

    围压
    /MPa
    弹性模量
    /GPa
    三轴抗压强度
    /MPa
    峰值应变
    /10−3
    黏结力
    /MPa
    内摩擦角
    /(°)
    15 26.81 217.93 10.27 6.86 57
    20 32.69 237.87 12.29
    下载: 导出CSV

    表  3  冲击次数统计表

    Table  3.   Summary of impacts

    岩样 预加轴压/
    MPa
    预加围压/
    MPa
    冲击时围压/
    MPa
    冲击次数
    XK1-1 62.5 15 7.5 35
    XK1-2 20 10 36
    XK2-1 72.5 15 7.5 21
    XK2-2 20 10 31
    XK3-1 82.5 15 7.5 13
    XK3-2 20 10 21
    下载: 导出CSV
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出版历程
  • 收稿日期:  2018-04-24
  • 修回日期:  2018-10-11
  • 刊出日期:  2019-06-01

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