Study on the Vibration Effects of Rock Slopes Under Blasting Loads

Engineering blasting is indispensable in national economic development; however, blast-induced vibration, recognized as a primary detrimental effect, necessitates rigorous investigation. This study delves into the dynamic response characteristics of rock slopes subjected to blasting loads. Leveraging a practical engineering context, field vibration monitoring was conducted during bench blasting excavation of a rock slope. Subsequently, a numerical model was developed to simulate the dynamic response of the rock slope, enabling a systematic analysis of the variations and distribution patterns of peak particle velocity (PPV), stress fields, and displacement fields within the rock mass. Key findings indicate that at the slope crest, the PPV of particles consistently attenuates with increasing distance from the blast center, with the rate of attenuation progressively diminishing as this distance extends. On the slope surface, an observable elevation amplification effect manifests on adjacent benches. Furthermore, a pronounced “whip-tail effect” is evident at the outer edge of individual benches, which gradually mitigates with ascending elevation. Post-blasting observations confirm the stability of the slope rock mass, characterized by distinct contours and uniform rock fragmentation, thereby offering valuable insights for analogous engineering endeavors.