Abstract: The blasting for the silt squeezing technology uses explosives buried in the silt to explode to form a cavity area and fill the cavities with roadbed materials such as crushed stones to achieve the construction of a highway embankment over the thick soft silty soils. At present, the main explosives used in this blasting process are ammonium ladder explosives and emulsion explosives. This technology is used in areas such as tidal zones. The explosive residues after blasting with ammonium ladder explosives include carcinogens such as nitro and benzene rings, which will spread to the surrounding seawater with the rising and falling tides, which may affect the aquaculture in the surrounding seas. In order to identify the harmful components and distribution rules of the explosive residues in the seawater of the blasting and squeezing process in the tidal zone, the explosives residuals were analyzed with UV-Visible spectrophotometer and LC-MS. The diffusion of explosive residues in water and silt in related tidal zone deep silt layer blasting and silt squeezing projects were detected. After the inspection, it was observed that the toxic substances such as nitro group and benzene ring did exist in the water after the blasting.

Key words: Blasting to Squeeze Silt, UVVisible Spectrophotometer, LCMS, Blasting Explosive Residue