Abstract: Large amount of micro-sized particles is contained by blasting dust in open-pit mine, the environmental pollution of the stope is serious. Based on analyzing the water fog dust removal mechanism, the blasting dust test system is designed and established, the blasting dust comparative test of water bag interval charge structure and rock power interval charge structure in Gaocun iron mine is conducted, the results show that the dust adsorption effect of water bag interval charge structure is better than rock power interval charge structure, the dust adsorption rate is 46.72%～51.20%,besides that, the improving effects of the rock broken size of water bag interval charge structure is also superior to rock power interval charge structure. The study results of this paper further indicated that the blasting technique of water interval charge dust removing has good application prospect in the engineering blasting of open-pit mining and other industries.

Key words: Water interval charge, Blasting dust, Water fog dust removing, Dust removing rate