Abstract: In foundation excavation of a nuclear power plant, the blasting vibration should be controlled strictly in order to ensure the safety of bedrock and nearby buildings and structures. The authors presented the whole process of vibration monitoring and vibration reduction method based on the foundation excavation of the nuclear island. The in situ blasting tests reveal that shock absorption holes can reduce the blasting vibration. The vibration velocities of rock particles increase with hole spacing, and decrease with hole diameter. It is more efficient in practice to reduce blasting vibration by reducing shock absorption hole spacing than by extending hole diameter.

Key words: blasting, shock absorption hole, nuclear power plant, foundation excavation, vibration