Abstract: To address the complex and spatially non-uniform vibration response of adjacent oil pipelines subjected to explosion-
induced stress waves during tunnel blasting construction,a systematic investigation is conducted on the vibration response
characteristics of buried oil pipelines under blasting loads. The propagation and attenuation laws of blasting-induced vibrations
along the pipeline cross-section and axial direction are analyzed. Based on the theory of explosion-induced stress wave
propagation,a dynamic response analytical model of buried pipelines under blasting loads is established,and a three-dimensional
numerical model is developed using LS-DYNA saftware to systematically simulate the dynamic response process of oil
pipelines subjected to blasting vibrations. On this basis,two key blasting parameters,namely tunnel burial depth and the explosive
charge per delay in cut holes,are selected to investigate their effects on pipeline vibration velocity and stress responses,
and corresponding vibration mitigation measures are proposed. The results indicate that under blasting dynamic loads,the vibration
response of the pipeline cross-section exhibits pronounced non-uniform distribution characteristics,with the peak vibration
velocity and effective stress being the largest at the bottom,followed by the middle,and the smallest at the top of the pipeline.
Along the axial direction of the pipeline,the peak vibration velocity and effective stress are mainly concentrated in the unexcavated
section located 0 m to 2 m from the blast source,and they decay exponentially with increasing distance. Parametric analysis
further shows that the peak vibration velocity of the pipeline follows an exponential relationship with tunnel burial depth,
while exhibiting a significant positive linear correlation with the explosive charge per delay in cut holes. The findings of this
study can provide a reference for vibration safety assessment and parameter optimization in tunnel blasting construction adjacent
to oil pipelines.