The impact of blasting operations is accompanied by both positive and negative after-effects. Vibrations, activated by explosion, help to disintegrate the rocks representing a positive effect on one hand and a negative effect on the other and they endanger the surrounding buildings and other properties. If the vibrations are large enough, then the ambient objects could be damaged or destroyed. The negative effects depend on their range and strength. Vibration intensity of seismic waves is generally proportional to the weight of the explosive used. Recently, negative effects of the blasting operations and quantification of the seismic safety have been highly actual and stand for a challenging problem. The article highlights the results of the blasting operation monitoring in some quarry in Slovakia., Julián Kondela and Blažej Pandula., and Obsahuje bibliografické odkazy