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中文摘要：
核电站基础爆破开挖过程中必须严格控制岩体爆破损伤深度，确保建基面安全。以广东岭澳核电站二期工程基础爆破开挖为例，通过现场爆破振动监测、岩体声波试验以及数值模拟，综合分析了岩体爆炸振动衰减规律和损伤特征，研究了距爆源一定距离处岩体振动速度与损伤特征的关系，提出了岭澳核电站二期工程岩体爆炸损伤深度的控制方法，确定了相应的安全闽值。分析结果表明，岭澳核电站二期工程基础爆破开挖时，当距爆源30m处的岩体质点振动速度不超过5．cm／s时，可保证下卧基岩的损伤深度小于2m，确保建基岩完整性。
英文摘要：
Damage should be controlled in order to ensure the safety of bedrock under blasting excavation in nuclear power plant. For this case, blasting vibration, sonic wave test and numerical simulation are employed to study the wave attenuation in rock mass and blasting induced damage under blasting excavation at Ling＇ao Nuclear Power Station （LNPS） in Guangdong Province of China. The relationship between damage characteristic and peak particle velocity （PPV） at a certain distance from the charge are suggested. The method and the vibration safety threshold to control the damage depth for bedrock under blasting excavation are then presented. It is reported that when the PPV at 30 m from charge is not beyond the safety threshold of 5 cm/s, the damage depth of the bedrock will not exceed 2 m. The method and the safety threshold presented can ensure the safety of bedrock under blasting excavation in the project.
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