Blast vibration intensity in the changing hydrogeological conditions

The attenuation of blast vibration intensity in jointed sedimentary rocks d epends not only on geological anisotropy of these rocks but also on hydroge ological conditions there. In mine blasting areas groundwater level in vibr ation medium varies largely. The vibration measurements were performed in d ifferent hydrogeological and geological conditions. Both factors were analy sed together and separately, the impact of gravity water content on the vib ration attenuation intensity was established and an equation tb express thi s function was worked out. The water content of rocks varies depending on the season and on the locati on of blasting site as regards the general water depression of mine. It is necessary To consider it while designing cautious blasting.