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Numerical modeling for a simulated rockburst experiment using LS-DYNA

机译:LS-DYNA模拟岩爆试验的数值模型

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Ground support systems are commonly used to mitigate the potential consequences of rockburst in burst prone mines. To assess the capacity of ground support systems when subjected to dynamic loading, simulated rockburst tests using blasting were conducted at the Kiruna Mine. In this study, a numerical simulation for one of the field tests was conducted using the LS-DYNA code to investigate the dynamic response of the ground support systems including shotcrete and rockbolts. The numerical results showed a similar particle vibration pattern and a crack pattern to those of the field measurements. The effects of the detonator position and the charge configuration on the dynamic response of ground support systems are also discussed. Numerical results indicated that the peak particle vibrations on the tested panel increase along the direction of detonation propagation. It is difficult to use different charge concentrations in one borehole to investigate the effect of different dynamic loads on the dynamic response of support systems. Numerical results also indicated that 2D numerical modeling for simulated rockburst experiments could overestimate the dynamic response of ground support systems.
机译:地面支持系统通常用于减轻摇滚突发矿物矿山的潜在后果。为了评估接地支持系统的容量,当受到动态负载时,在基鲁纳矿进行使用爆破的模拟岩爆试验。在该研究中,使用LS-DYNA代码进行了一个现场测试的数值模拟,以研究地面支撑系统的动态响应,包括喷射器和岩波。数值结果显示了与现场测量的颗粒振动模式和裂纹图案。还讨论了雷管位置和充电配置对接地支撑系统的动态响应的影响。数值结果表明,峰粒子振动沿着爆轰传播的方向增加。在一个钻孔中难以使用不同的电荷浓度,以研究不同动态载荷对支撑系统的动态响应的影响。数值结果还表明,模拟岩爆实验的2D数值建模可以高估地面支持系统的动态响应。

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