Seismic wave induced by blasting excavation of tunnel may exert adverse effects to the surrounding rock. To study the different characteristics and attenuation of blast-induced vibration in the blasting tunnel and adjacent tunnel, field blasting tests are carried out to record velocity–time histories during blasting in Wanhua Underground Gas Storage. The characteristics and attenuation of vibration velocity and energy are presented based on the field data. And the dynamic finite-element model is established to further study the vibration attenuation law. Results demonstrate that PPV and vibration energy of the adjacent tunnel is greater than that in the blasting tunnel and attenuates more readily when monitoring points are near the blasting area. The dominant frequencies of the adjacent tunnel are higher than that in the blasting tunnel at three orthogonal directions. Adopting vibration energy as the evaluation index of seismic intensity, the fitting formula has favorable prediction accuracy, which will provide more accurate guidance for controlling the adverse effects of tunnel blasting.

隧道爆破开挖引起的地震波可能会对围岩产生不利影响。为了研究爆破隧道和邻近隧道中爆破引起的振动的不同特征和衰减，进行了现场爆破试验，以记录万华地下储气库爆破过程中的速度-时间历史。根据现场数据给出了振动速度和能量的特性及其衰减。建立了动态​​有限元模型，以进一步研究振动衰减规律。结果表明，邻近隧道的PPV和振动能量要大于爆破隧道，并且当监测点位于爆破区域附近时，衰减更容易衰减。在三个正交方向上，相邻隧道的主导频率高于爆破隧道。该拟合公式采用振动能量作为地震烈度的评价指标，具有良好的预测精度，为控制隧道爆破的不利影响提供更为准确的指导。