爆破载荷作用下高地应力巷道PPV衰减规律研究

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振动与冲击 ›› 2023, Vol. 42 ›› Issue (23) : 260-266.

论文

乔国栋1，2，刘泽功1,2，高魁1，傅师贵1，2，张健玉1，2，刘华举3

作者信息 +

Attenuation law of PPV in high crustal stress tunnels under blasting load

QIAO Guodong1，2,LIU Zegong1,2,GAO Kui1,FU Shigui1，2,ZHANG Jianyu1，2， LIU Huaju3

Author information +

文章历史 +

摘要

为了研究深部高地应力条件下巷道围岩质点峰值振动速度（PPV）衰减规律，以淮南潘三矿超前卸压预裂爆破扰动瓦斯综治巷为工程背景，使用ANSYS/LS-DYNA数值模拟软件对不同地应力下巷道围岩的PPV衰减规律进行研究。使用理论分析与数值模拟相结合的方法，从动应力、振动能量的角度对地应力与PPV之间的关系做出了解释。结果表明：随着爆心距增大，PPV整体上呈指数型衰减；在相同爆心距下，地应力越大，PPV越小且衰减速度越慢；随着爆心距增大，地应力对PPV抑制作用减弱；由于爆炸应力波的反射叠加效应，巷道迎爆侧围岩PPV衰减曲线出现反复波动，在自由面处获得最大峰值。迎爆侧围岩仍然遵循地应力越大PPV越小的规律。研究结果对深部高地应力爆破作业方案优化设计及深井爆破振动安全判据、构筑物动力响应特征的研究具有指导意义。

Abstract

In this paper, the Huainan Pan San Mine overrun pre-cracking blasting disturbed gas synthesis lane was used as the engineering background. Numerical simulation software ANSYS/LS-DYNA was used to investigate the PPV attenuation pattern of the roadway envelope under different in-situ stresses. A combination of theoretical analysis and numerical simulation was used to provide an interpretation of the relationship between in-situ stress and PPV in terms of dynamic stress and vibration energy. The results show that the PPV decays exponentially with increasing blast core distance; the higher the in-situ stress, the smaller the PPV and the slower the decay rate at the same blast core distance; as the blast core distance increases, the suppression effect of in-situ stress on PPV decreases; due to the reflection superposition effect of blast stress waves, the PPV decay curve of the perimeter rock on the blast side of the tunnel fluctuates repeatedly, with a maximum peak at the free face. The PPV decay curve on the blast side still follows the rule that the higher the in-situ stress, the smaller the PPV. The results of the study are of great significance to the design optimization of deep high in-situ stress blasting operations and the research on the safety criteria of deep shaft blasting vibration and the dynamic response characteristics of structures.

导出引用

乔国栋1，2，刘泽功1,2，高魁1，傅师贵1，2，张健玉1，2，刘华举3. 爆破载荷作用下高地应力巷道PPV衰减规律研究[J]. 振动与冲击, 2023, 42(23): 260-266

QIAO Guodong1，2,LIU Zegong1,2,GAO Kui1,FU Shigui1，2,ZHANG Jianyu1，2， LIU Huaju3. Attenuation law of PPV in high crustal stress tunnels under blasting load[J]. Journal of Vibration and Shock, 2023, 42(23): 260-266

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