首页> 外文学位 >Prediction of blast-induced ground vibration and rock fragmentation by statistical and combined finite-discrete element modelling methods for the McGill utility tunnel.
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Prediction of blast-induced ground vibration and rock fragmentation by statistical and combined finite-discrete element modelling methods for the McGill utility tunnel.

机译:通过统计和有限元离散组合建模方法对McGill公用事业隧道的爆炸引起的地面振动和岩石破碎进行预测。

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摘要

The prediction of blast-induced ground vibration and rock fragmentation at the McGill Utility Replacement Tunnel was investigated using two techniques: empirical peak particle velocity prediction formulae and combined finite-discrete element method (FDEM) modelling. A statistical analysis of ten scaled-distance empirical formulae was performed by fitting them to 269 vibration recordings and assessing the quality of fit with seven statistical indices. In the FDEM studies, a transient blast loading function was developed for explosive product gases by idealizing explosive detonation and depressurization as the injection and expansion of gas into a borehole. With calibrated material properties and blast loading functions, stress-wave induced tensile and shear fracturing were replicated for a single blasthole. Moreover, synthetic fragmentation patterns and velocity-time histories were produced in simulations of blasting round BR-T66. The influence of free surface wave reflection and material impedance constrasts on ground motion amplification was investigated by comparing recorded and synthetic velocity-time histories.
机译:使用两种技术研究了麦克吉尔公用事业置换隧道中爆炸引起的地面振动和岩石碎裂的预测:经验峰值粒子速度预测公式和组合有限元方法(FDEM)建模。对十个比例距离的经验公式进行统计分析,方法是将它们拟合到269个振动记录,并使用七个统计指标评估拟合的质量。在FDEM研究中,通过将炸药爆炸和减压理想化为气体向井筒中的注入和膨胀,为爆炸性产品气体开发了瞬态爆炸加载功能。具有校准的材料特性和爆炸加载功能,应力波引起的拉伸和剪切断裂被复制到单个爆破孔中。此外,在BR-T66爆破的模拟中产生了合成碎片模式和速度-时间历史。通过比较记录的和合成的速度-时间历史,研究了自由表面波反射和材料阻抗约束对地面运动放大的影响。

著录项

  • 作者

    Harvey, Simon G. E.;

  • 作者单位

    University of Toronto (Canada).;

  • 授予单位 University of Toronto (Canada).;
  • 学科 Civil engineering.;Geological engineering.
  • 学位 M.A.S.
  • 年度 2016
  • 页码 127 p.
  • 总页数 127
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

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