Abstract: Since the blasting compaction technology has been successfully applied to the civil engineering in the 80s of the last century in China, there are very few in studies of the deep and thick silt blasting compaction, such as the energy transfer theory and the tide level under the blasting working conditions in comparison with soil rock blasting. When there are sensitive buildings or structures in the blasting area, making studies of the vibration effects of blasting has a practical significance. This paper, depending upon a nuclear power station, carries out researches of thick silt over 30 m in the intake channel by blasting compaction, including studies of propagation rule of vibration, influence factors and vibration effects by blasting. Firstly, the analysis of energy distribution of the vibration induced reflected wave and refracted wave has been done in this paper; secondly, analysis of the damping laws of vibration rates and frequency of the north and south banks has made under the different blasting conditions. Compared with the high and lower tidal levels, the analysis results show that the thick seawater covering the silt has a positive effect on the energy dissipation, and there are no great differences between the explosive energy utilization under two working conditions. The main frequency mainly concentrates at the low frequency area. Finally comparing the blasting compaction with the soil rock blasting, and it is found that the energy ratio of the blasting compaction which transfers to a seismic wave is higher, the main reason is the discrepancy of the explosive structure which leads the energy transfer ratio having remarkable differences.