不耦合装药爆破孔壁压力峰值的实验研究

叶志伟 陈明 魏东 卢文波 刘涛 吴亮

叶志伟, 陈明, 魏东, 卢文波, 刘涛, 吴亮. 不耦合装药爆破孔壁压力峰值的实验研究[J]. 爆炸与冲击, 2021, 41(5): 055201. doi: 10.11883/bzycj-2020-0004
引用本文: 叶志伟, 陈明, 魏东, 卢文波, 刘涛, 吴亮. 不耦合装药爆破孔壁压力峰值的实验研究[J]. 爆炸与冲击, 2021, 41(5): 055201. doi: 10.11883/bzycj-2020-0004
YE Zhiwei, CHEN Ming, WEI Dong, LU Wenbo, LIU Tao, WU Liang. Experimental study on the peak pressure of borehole wall in decoupling charge blasting[J]. Explosion And Shock Waves, 2021, 41(5): 055201. doi: 10.11883/bzycj-2020-0004
Citation: YE Zhiwei, CHEN Ming, WEI Dong, LU Wenbo, LIU Tao, WU Liang. Experimental study on the peak pressure of borehole wall in decoupling charge blasting[J]. Explosion And Shock Waves, 2021, 41(5): 055201. doi: 10.11883/bzycj-2020-0004

不耦合装药爆破孔壁压力峰值的实验研究

doi: 10.11883/bzycj-2020-0004
基金项目: 国家自然科学基金(51779193,51479147);湖北省技术创新专项重大项目(2017ACA102)
详细信息
    作者简介:

    叶志伟(1994- ),男,博士研究生,whuyzw@whu.edu.cn

    通讯作者:

    陈 明(1977- ),男,博士,教授,博士生导师,whuchm@whu.edu.cn

  • 中图分类号: O383

Experimental study on the peak pressure of borehole wall in decoupling charge blasting

  • 摘要: 不耦合装药爆破孔壁压力峰值是控制岩体轮廓成形质量及进行非流固耦合爆破振动响应数值模拟分析的重要参数,本文采用实验方法研究了不耦合装药爆破的孔壁压力峰值:利用材质为20钢的无缝薄壁钢管模拟不耦合装药爆破炮孔,以高灵敏度、高精度的应变片为传感器,选用超动态应变仪采集钢管内置柱状炸药卷爆炸过程中钢管外壁产生的环向应变,应用动荷载作用下薄壁圆筒的动力响应计算方法,反演分析采集的钢管外壁环向应变数据,得到了爆破过程中空气冲击波作用于钢管内壁的冲击荷载压力峰值,间接测量了不耦合装药爆炸后的孔壁压力峰值。实验获得了6种不耦合装药工况下的爆破孔壁压力峰值测试数据,并计算了相应工况下实验值较准静态爆生气体压力的增大倍数,拟合结果表明压力增大倍数随不耦合系数的增大近似呈线性增长。同时也分析了部分试验工况下爆炸测试结果不理想的原因,研究成果可为轮廓爆破孔壁压力峰值的测试与计算提供参考。
  • 图  1  应变片布置示意图

    Figure  1.  Schematic diagram of strain gauge arrangement

    图  2  钢管与炸药安置示意图

    Figure  2.  Schematic diagram of steel pipe and explosive placement

    图  3  爆炸罐内钢管安放

    Figure  3.  Steel pipe placement in an explosion tank

    图  4  测试流程示意图

    Figure  4.  Schematic diagram of test flow

    图  5  钢管鼓胀与撕裂

    Figure  5.  Steel pile bulging and tearing under the blasting effect

    图  6  应变片撕裂特征曲线

    Figure  6.  Strain gauge tearing characteristic curve

    图  7  第一批次实验不同工况环向应变典型时程曲线

    Figure  7.  Circumferential strain typical time history curve under different conditions of the first batch experiment

    图  8  第二批次实验不同工况环向应变典型时程曲线

    Figure  8.  Circumferential strain typical time history curve under different conditions of the second bath experiment

    图  9  压力增大倍数规律曲线

    Figure  9.  Regular curve of pressure increase factor

    表  1  第一批次实验工况

    Table  1.   First batch experimental cases

    实验工况钢管内径/mm钢管外径/mm数量/根药卷直径/mm
    F-EI-14250411、16、21、26
    F-EI-25060411、16、21、26
    F-EI-37689416、21、26、32
    F-EI-490102 416、21、26、32
    F-EI-5110 121 416、21、26、32
    下载: 导出CSV

    表  2  第二批次实验工况

    Table  2.   Second batch experimental cases

    实验工况钢管内径/mm钢管外径/mm数量/根药卷直径/mm
    S-EI-172 88316
    S-EI-288108316
    S-EI-388108421
    S-EI-492108316
    S-EI-5107 121316
    S-EI-6107 127421
    下载: 导出CSV

    表  3  第二批次实验不同工况钢管内壁压力峰值(单位:MPa)

    Table  3.   Peak pressure of steel pipe inner wall under different conditions in the second bath experiment (units: MPa)

    实验工况实验序号通道a通道b通道c通道d平均值
    S-EI-1 (72/16)1280.79303.46251.44245.00270.17
    2261.73346.04231.87214.72263.59
    3275.59288.43262.36231.92264.58
    S-EI-2 (88/16)4180.54231.37224.38197.95208.56
    5199.43231.80224.57212.34217.04
    S-EI-3 (88/21)6损坏277.69259.54287.26274.83
    7321.77284.25299.88272.16294.51
    S-EI-4 (92/16)8188.27211.06200.80187.87197.00
    9170.45损坏191.53209.43190.47
    S-EI-5 (107/16)10156.42173.19163.86损坏164.49
    11126.06157.26损坏172.74152.02
    12143.53146.93158.72171.28155.12
    S-EI-6 (107/21)13235.77218.79178.93213.21211.68
    14230.38237.75252.18264.05246.09
    15229.18损坏236.71254.07239.99
    16294.95208.28255.38220.31244.73
    下载: 导出CSV

    表  4  压力增大倍数

    Table  4.   Pressure increase factor

    实验工况不耦合系数钢管内壁压力峰值/MPa准静态压力/MPa压力增大倍数
    88/21 (S-EI-3)4.19284.6717.4416.32
    72/16 (S-EI-1)4.50266.1114.4918.37
    107/21 (S-EI-6)5.10235.6210.4922.46
    88/16 (S-EI-2)5.50212.80 8.6024.74
    92/16 (S-EI-4)5.75193.74 7.6625.29
    107/16 (S-EI-5)6.68157.21 5.1930.30
    下载: 导出CSV
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  • 收稿日期:  2020-01-02
  • 修回日期:  2020-12-07
  • 网络出版日期:  2021-04-23
  • 刊出日期:  2021-05-05

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