Relying on the entrance section of a high-speed railway tunnel blasting project, the fluid-solid coupling algorithm based on ANSYS/LS-DYNA was used to optimize the parameters of wedge cut blasting, and the vibration could be reduced on the basis of ensuring the blasting effect. Through the combination of visual numerical simulation results and rock-breaking mechanism of wedge cut blasting, the maximum vibration velocity of different monitoring points in the model under different segmented time delay was analyzed. The results show that the best method for detonation is dividing the blastholes into three segments from upper to lower and dividing the left and right symmetrical blastholes into one segment. When the delay time is 10 ms, the average vibration reduction ratio is the best, which is reduced by 18% compared with the six-hole simultaneous blasting. In addition, the actual surrounding rock stress has a clamping effect on the cut blasting area. The wedge cut blasting footage obtained by numerical simulation was basically consistent with the field results, which proved that the model is reasonable and effective. This study intuitively and accurately demonstrated the process of cut blasting, the superposition curve of vibration velocity and the vibration reduction results under different delay times, and the effect of cut blasting. The results can be directly applied to similar projects, and the optimal blasting parameters and related issues can be solved more accurately with the help of this engineering analysis method.

中文翻译：

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隧道楔形切入爆破延时法优化研究

以某高速铁路隧道爆破工程入口段为依托，采用基于ANSYS/LS-DYNA的流固耦合算法对楔形切割爆破参数进行优化，在保证爆破的基础上降低振动。爆破效果。通过可视化数值模拟结果和楔形切割爆破破岩机理相结合，分析了不同分段时延下模型中不同监测点的最大振动速度。结果表明，爆破的最佳方法是将炮眼从上到下分成三段，将左右对称的炮眼分成一段。延迟时间为10 ms时，平均减振率最佳，与六孔同时爆破相比减少了18%。此外，实际围岩应力对切割爆破区有夹紧作用。数值模拟得到的楔形切割爆破进尺与现场结果基本一致，证明该模型是合理有效的。本研究直观、准确地展示了切割爆破的过程、不同延迟时间下振动速度与减振结果的叠加曲线，以及切割爆破的效果。所得结果可直接应用于类似工程，借助这种工程分析方法，可以更准确地解决最优爆破参数及相关问题。数值模拟得到的楔形切割爆破进尺与现场结果基本一致，证明该模型是合理有效的。本研究直观、准确地展示了切割爆破的过程、不同延迟时间下振动速度与减振结果的叠加曲线，以及切割爆破的效果。所得结果可直接应用于类似工程，借助这种工程分析方法，可以更准确地解决最优爆破参数及相关问题。数值模拟得到的楔形切割爆破进尺与现场结果基本一致，证明该模型是合理有效的。本研究直观、准确地展示了切割爆破的过程、不同延迟时间下振动速度与减振结果的叠加曲线，以及切割爆破的效果。所得结果可直接应用于类似工程，借助这种工程分析方法，可以更准确地解决最优爆破参数及相关问题。不同延迟时间下的振动速度与减振结果的叠加曲线，以及切割爆破的效果。所得结果可直接应用于类似工程，借助这种工程分析方法，可以更准确地解决最优爆破参数及相关问题。不同延迟时间下的振动速度与减振结果的叠加曲线，以及切割爆破的效果。所得结果可直接应用于类似工程，借助这种工程分析方法，可以更准确地解决最优爆破参数及相关问题。