冻结砂岩爆破破岩的能量耗散特性

蒋楠 张硕彦 姚颖康 周传波 罗学东 曹华彰

蒋楠, 张硕彦, 姚颖康, 周传波, 罗学东, 曹华彰. 冻结砂岩爆破破岩的能量耗散特性[J]. 爆炸与冲击, 2024, 44(5): 055201. doi: 10.11883/bzycj-2023-0258
引用本文: 蒋楠, 张硕彦, 姚颖康, 周传波, 罗学东, 曹华彰. 冻结砂岩爆破破岩的能量耗散特性[J]. 爆炸与冲击, 2024, 44(5): 055201. doi: 10.11883/bzycj-2023-0258
JIANG Nan, ZHANG Shuoyan, YAO Yingkang, ZHOU Chuanbo, LUO Xuedong, CAO Huazhang. Energy dissipation characteristics of fragmentation of frozen sandstone[J]. Explosion And Shock Waves, 2024, 44(5): 055201. doi: 10.11883/bzycj-2023-0258
Citation: JIANG Nan, ZHANG Shuoyan, YAO Yingkang, ZHOU Chuanbo, LUO Xuedong, CAO Huazhang. Energy dissipation characteristics of fragmentation of frozen sandstone[J]. Explosion And Shock Waves, 2024, 44(5): 055201. doi: 10.11883/bzycj-2023-0258

冻结砂岩爆破破岩的能量耗散特性

doi: 10.11883/bzycj-2023-0258
基金项目: 国家自然科学基金(41972286,42072309,42102329);江汉大学省部共建精细爆破国家重点实验室、江汉大学爆破工程湖北省重点实验室联合开放基金(PBSKL2023A1)
详细信息
    作者简介:

    蒋 楠(1986- ),男,博士,副教授,jiangnan@cug.edu.cn

    通讯作者:

    姚颖康(1981- ),男,博士,教授,shanxiyao@jhun.edu.cn

  • 中图分类号: O383

Energy dissipation characteristics of fragmentation of frozen sandstone

  • 摘要: 为探究冻结岩体的冲击力学性能,并提出寒区爆破开挖工程中合理的爆破炸药单耗,针对寒区典型分布的砂岩,采用室内分离式霍普金森压杆试验与理论分析相结合的方法,开展了冻结砂岩冲击力学性能及爆破破岩能量耗散特性研究。结果表明:(1) 冻结状态砂岩的动态抗压强度和动态弹性模量相比常温状态整体有所提升,而应变峰值整体有所下降。对比静载与动载试验结果,相同物理参数下,砂岩的抗压强度差距不大,而动态弹性模量明显高于静态弹性模量。(2) 常温状态砂岩和冻结状态砂岩试件的耗散能量均随含水率的增大而逐渐减低,且冻结状态砂岩的耗散能量高于常温状态。相比常温状态,冻结砂岩在含水率为0、0.25ω、0.50ω、0.75ω、1.00ω时,其耗散能量增幅分别为21.6%、64.9%、80.3%、78.2%、83.3%。(3) 相同含水率下,冻结状态砂岩的炸药单耗均高于常温状态,在含水率为0、0.25ω、0.50ω、0.75ω、1.00ω时,冻结状态砂岩爆破炸药单耗相比常温状态分别增加20.4%、61.3%、60.0%、55.6%、66.7%。(4) 将常温与冻结状态砂岩爆破炸药单耗数值进行拟合,得到不同状态砂岩爆破破岩的单耗修正模型,可为寒区爆破工程提供参考。
  • 图  1  改进的SHPB试验装置

    Figure  1.  Improved SHPB test device

    图  2  常温状态下不同含水率砂岩的冲击破坏形态

    Figure  2.  Impact failure morphology of sandstones with different moisture contents at room temperature

    图  3  冻结状态下不同含水率砂岩的冲击破坏形态

    Figure  3.  Impact failure morphology of frozen sandstones with different moisture contents

    图  4  常温状态砂岩的应力时程曲线和动态抗压强度变化曲线

    Figure  4.  Stress history curves and dynamic compressive strength curve of sandstones at room temperature

    图  5  冻结状态砂岩的应力时程曲线和动态抗压强度变化曲线

    Figure  5.  Stress history curves and dynamic compressive strength curve of frozen sandstones

    图  6  常温状态砂岩的应变时程曲线和动态应变峰值变化曲线

    Figure  6.  Stain history curves and dynamic peak strain curve of sandstones at room temperature

    图  7  冻结状态砂岩的应变时程曲线和动态应变变化曲线

    Figure  7.  Stain history curves and dynamic peak strain curve of frozen sandstones

    图  8  常温状态砂岩的动态弹性模量

    Figure  8.  Dynamic elastic modulus of sandstones at room temperature

    图  9  冻结状态砂岩的动态弹性模量

    Figure  9.  Dynamic elastic modulus of frozen sandstones

    图  10  动静载作用下冻结砂岩力学参数的对比

    Figure  10.  Comparison of mechanical parameters under dynamic and static loads

    图  11  常温状态砂岩试件的能量曲线

    Figure  11.  Energy curves of sandstone specimens at room temperature

    图  12  冻结状态砂岩试件的能量曲线

    Figure  12.  Energy curves of frozen sandstone specimens

    图  13  常温与冻结状态砂岩耗散能量的对比

    Figure  13.  Comparison of energy dissipation of sandstones at room temperature and frozen state

    图  14  不同状态砂岩爆破破岩的单耗修正模型

    Figure  14.  Unit consumption correction model for sandstone blasting fragmentation in different states

    表  1  砂岩的静力学参数

    Table  1.   Static parameters of sandstones

    ρ/(g·cm−3) T/℃ 含水率 cp/(m·s−1) σc/MPa σt/MPa E/GPa μ
    2.02 20 0 2 800 58.62 16.2 33.52 0.27
    2.08 20 0.25ω 2 850 42.36 8.7 22.33 0.27
    2.15 20 0.50ω 2 970 34.70 4.7 18.26 0.28
    2.20 20 0.75ω 3 120 30.25 4.2 13.61 0.28
    2.25 20 1.00ω 3 200 25.63 3.0 11.62 0.28
    2.02 –20 0 2 830 60.64 18.4 32.74 0.27
    2.08 –20 0.25ω 2 800 50.45 9.5 27.72 0.28
    2.15 –20 0.50ω 2 950 46.68 5.6 23.71 0.28
    2.20 –20 0.75ω 3 100 41.22 4.4 19.45 0.30
    2.25 –20 1.00ω 3 180 35.70 3.8 18.28 0.30
    下载: 导出CSV

    表  2  砂岩SHPB压缩试验分组

    Table  2.   Grouping of sandstone SHPB compression test

    T/℃ 含水率 平均撞击速度/(m·s−1) 平均应变率/s−1
    20 0 5.88 38.3
    20 0.25ω 5.83 47.3
    20 0.50ω 5.89 62.8
    20 0.75ω 5.96 77.5
    20 1.00ω 5.92 83.7
    –20 0 6.02 43.3
    –20 0.25ω 5.85 46.9
    –20 0.50ω 5.90 52.3
    –20 0.75ω 5.95 46.1
    –20 1.00ω 5.93 57.9
    下载: 导出CSV

    表  3  岩石乳化炸药的参数

    Table  3.   Parameters of rock emulsion explosive

    密度/(g·cm−3)爆速/(m·s−1)药卷直径/mm爆热/(MJ·kg−1)
    1.253 20018~1753.991
    下载: 导出CSV

    表  4  砂岩的力学参数

    Table  4.   Mechanical parameters of sandstones

    密度/(g·cm−3) 温度/℃ 含水率 声波速度/(m·s−1) 动态抗压强度/MPa 抗拉强度/MPa 动态弹性模量/GPa 动态泊松比
    2.02 20 0 2 800 63.75 16.2 66.50 0.216
    2.08 20 0.25ω 2 850 41.95 8.7 75.78 0.216
    2.15 20 0.50ω 2 970 36.88 4.7 58.63 0.224
    2.20 20 0.75ω 3 120 34.89 4.2 36.75 0.224
    2.25 20 1.00ω 3 200 29.60 3.0 23.87 0.224
    2.02 –20 0 2 830 64.82 18.4 62.94 0.216
    2.08 –20 0.25ω 2 800 45.56 9.5 83.72 0.224
    2.15 –20 0.50ω 2 950 45.52 5.6 97.74 0.224
    2.20 –20 0.75ω 3 100 43.68 4.4 68.45 0.240
    2.25 –20 1.00ω 3 180 30.19 3.8 28.10 0.240
    下载: 导出CSV

    表  5  爆破能量分布

    Table  5.   Explosion energy distribution

    状态 含水率 E1/kJ E2/kJ E3/kJ E4/kJ E5/kJ 其他/kJ
    常温 0 15.36 2.01 1.89 0.75 1.48 41.16
    0.25ω 17.44 1.63 1.78 0.65 1.45 39.75
    0.50ω 18.49 0.81 2.41 0.53 2.51 37.95
    0.75ω 19.43 2.43 4.43 0.46 4.58 31.37
    1.00ω 20.51 6.12 7.01 0.38 7.24 21.44
    冻结 0 15.13 2.29 2.05 0.36 1.49 41.37
    0.25ω 17.07 2.34 1.83 0.71 1.51 39.24
    0.50ω 17.70 3.45 1.45 0.65 1.58 37.87
    0.75ω 18.53 7.07 2.38 0.62 2.75 31.35
    1.00ω 20.29 9.55 5.96 0.38 5.85 20.94
    下载: 导出CSV

    表  6  砂岩冲击及炸药爆破破岩耗能

    Table  6.   Energy consumption of sandstone impact and explosive blasting fragmentation

    状态 含水率 冲击破岩耗能/J 爆炸破岩耗能/kJ
    常温 0 26.4 17.37
    0.25ω 18.5 19.07
    0.50ω 14.7 19.30
    0.75ω 12.4 21.86
    1.00ω 10.2 26.63
    冻结 0 32.1 17.42
    0.25ω 30.5 19.41
    0.50ω 26.5 21.15
    0.75ω 22.1 25.60
    1.00ω 18.7 29.84
    下载: 导出CSV

    表  7  常温与冻结状态不同含水率砂岩爆破炸药单耗

    Table  7.   Unit explosive consumption of sandstones with different moisture contents at room temperature and frozen state

    含水率 炸药单耗/(kg·m−3)
    常温状态砂岩 冻结状态砂岩
    0 0.49 0.59
    0.25ω 0.31 0.50
    0.50ω 0.25 0.40
    0.75ω 0.18 0.28
    1.00ω 0.12 0.20
    下载: 导出CSV
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出版历程
  • 收稿日期:  2023-07-23
  • 修回日期:  2023-11-20
  • 网络出版日期:  2023-12-25
  • 刊出日期:  2024-05-08

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