Abstract:The vibration induced by blasting in the vicinity of a dam foundation can induce some adverse effect on the curtain grouting. The peak particle velocity(PPV) caused by blasting is always adopted as the criterion in control of the blasting influence and few theoretical study has ever been carried out on this problem. The theory of stress wave is adopted in this paper to analyze the interaction between blast-induced stress wave and curtain grouting. The safe PPV in the vicinity of the curtain grouting is then theoretically derived by analyzing the breakage of the bound between curtain grouting and rock.