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基于RHT本构的隧道爆破参数优化与振动损伤数值研究

汪大为 王志亮 汪书敏

汪大为,王志亮,汪书敏. 基于RHT本构的隧道爆破参数优化与振动损伤数值研究[J]. 水文地质工程地质,2023,50(6): 129-136 doi:  10.16030/j.cnki.issn.1000-3665.202210009
引用本文: 汪大为,王志亮,汪书敏. 基于RHT本构的隧道爆破参数优化与振动损伤数值研究[J]. 水文地质工程地质,2023,50(6): 129-136 doi:  10.16030/j.cnki.issn.1000-3665.202210009
WANG Dawei, WANG Zhiliang, WANG Shumin. Numerical study of tunnel blasting parameter optimization and vibration damage based on the RHT constitutive model[J]. Hydrogeology & Engineering Geology, 2023, 50(6): 129-136 doi:  10.16030/j.cnki.issn.1000-3665.202210009
Citation: WANG Dawei, WANG Zhiliang, WANG Shumin. Numerical study of tunnel blasting parameter optimization and vibration damage based on the RHT constitutive model[J]. Hydrogeology & Engineering Geology, 2023, 50(6): 129-136 doi:  10.16030/j.cnki.issn.1000-3665.202210009

基于RHT本构的隧道爆破参数优化与振动损伤数值研究

doi: 10.16030/j.cnki.issn.1000-3665.202210009
基金项目: 国家自然科学基金项目(U1965101);国家自然科学基金项目(12272119)
详细信息
    作者简介:

    汪大为(1998-),男,硕士研究生,从事岩石动力学研究。E-mail:DavidW0564335@163.com

    通讯作者:

    王志亮(1969-),男,博士,教授,博士生导师,主要从事岩石力学特性与损伤破坏机理研究。E-mail:cvewzL@hfut.edu.cn

  • 中图分类号: U45

Numerical study of tunnel blasting parameter optimization and vibration damage based on the RHT constitutive model

  • 摘要: 为了解决爆破参数优化问题以及考虑炮孔间相互作用对围岩损伤空间分布的影响,先利用数值试算与冲击试验相对照的方法,标定出大理岩Riedel-Hiermaier-Thoma本构模型参数。接着,对隧道全断面爆破开挖开展模拟计算,考察了多炮孔间相互作用下围岩爆破损伤演化过程。最后,基于起爆顺序、径向不耦合系数和分段间隔装药3种方法来优化爆破参数,并对质点振动和围岩损伤进行了深入分析。结果表明:标定所得的本构参数可准确描述大理岩动态应力-应变响应,且模拟结果能很好地揭示爆破损伤演化规律;岩石损伤从爆心处向外发展,随后在炮孔连线上连接贯通;相比于上述其他2种方法,当径向不耦合系数k小于1.33时,在保证爆破效果前提下改变k值能有效地降低围岩的爆破损伤;隧道竖向平均振动速度要大于水平向的对应值,且竖向拱顶和底板中部对爆破振动呈现较高的敏感性。研究结果为工程实践中爆破参数优化选取和围岩损伤精确评估等可提供参考。
  • 图  1  SHPB装置

    Figure  1.  SHPB device

    图  2  试样应力-应变曲线

    Figure  2.  Stress-strain curves of rock samples

    图  3  试样的破坏形态对比

    Figure  3.  Comparision of failure mode of sample

    图  4  炮孔布置(单位:cm)

    Figure  4.  Arrangement of blast holes (unit: cm)

    图  5  数值模型及网格划分

    Figure  5.  Numerical modeling and meshing

    图  6  正常起爆下不同时刻爆破损伤

    Figure  6.  Blasting damage at different timea under normal initiation

    图  7  预裂爆破损伤

    Figure  7.  Blasting damage of pre-split blasting

    图  8  不同耦合系数爆破损伤

    Figure  8.  Blasting damage with different coupling coefficients

    图  9  装药结构分类

    Figure  9.  Classification of charge structure

    图  10  不同装药结构爆破损伤

    Figure  10.  Blasting damage of different charging structures

    图  11  代表性监测点

    Figure  11.  Representative monitoring points

    图  12  不同位置的合速度时间曲线

    Figure  12.  Changes of velocity with time at different positions

    图  13  速度峰值空间分布图

    Figure  13.  Spatial distribution of the peak velocity

    表  1  锦屏大理岩RHT模型参数

    Table  1.   RHT model parameters of the Jinping marble

    参数取值参数取值参数取值
    ρ0 /(kg·m−32812Ft*0.10Pcrush /MPa87
    G /GPa16.9Fs*0.19Gc*0.8
    fc /MPa130A1 /GPa30.42Gt*0.7
    N0.615A2 /GPa51.47XI0.7
    βt0.0133A3 /GPa31.46D10.04
    B00.9Q00.7D21
    B10.9B0.0105βc0.0097
    α01.0EOC /(s−13.0E-5Af1.3
    T1 /GPa30.42EOT /(s−13.0E-6Nf0.7
    Plock /GPa8A2.34Np3
    下载: 导出CSV

    表  2  炸药JWL方程参数

    Table  2.   JWL equation of state parameters of explosive

    参数 AJ /GPa BJ /GPa R1 R2 ɷ PJ /GPa EJ /GPa
    取值 625 23.3 5.25 1.6 0.28 22 8.56
    下载: 导出CSV
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出版历程
  • 收稿日期:  2022-10-08
  • 录用日期:  2023-09-06
  • 修回日期:  2023-02-17
  • 网络出版日期:  2023-10-31
  • 刊出日期:  2023-11-15

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