地下洞室边墙爆破振动传播衰减规律研究

基于桃花嘴矿区地下洞室爆破振动现场试验的实测数据，发现了地下洞室爆破开挖诱发边墙质点峰值振动速度传播衰减的特点，即爆源近区和边墙中心区域具有更大的放大效应。建立了四边简支板的动力学模型，进一步结合量纲分析法，推导出考虑边墙四边约束的地下洞室爆破边墙质点峰值振动速度预测公式。将实测数据分别代入萨道夫斯基公式和推导公式进行线性回归运算，得到萨道夫斯基公式预测值和推导公式预测值的平均误差分别为30.7%和5.1%。结果表明，该公式能较准确地反映地下洞室爆破边墙质点峰值振动速度存在的放大效应，特别可以精确预测放大效应显著区域的爆破振动峰值速度，为更好地控制边墙爆破振动损伤提供了参考价值。

Study on attenuation law of blasting vibration propagation of side wall of underground cavern

By analyzing the field test data of blasting vibration of underground caverns in Taohuazui mining area, the characteristics of the peak particle velocity propagation attenuation on the side wall induced by blasting excavation in underground caverns were found, which presented a larger amplification effect in the vicinity of the source and the central area of the side wall. A dynamic analytical model of simply supported slabs with four sides was established. Furthermore, according to dimensional analysis method, a formula for predicting the peak particle velocity of side wall in underground cavern blasting was deduced in the case of four side constraints of side wall. Finally, the measured data were substituted into the Sadovsky formula and the formula deduced in this paper for linear calculation. The average errors between the predicted values by the Sadovsky formula and by the formula developed in this paper and the measured values were 30.7% and 5.1%, respectively. These results indicate that the proposed formula can accurately reflect the amplification effect of the peak particle velocity in the side wall of underground cavern blasting. In particular, it can accurately predict the peak velocity of blasting vibration in a region where the amplification effect is significant, and provides a reference for better control of side wall blasting vibration damage.