INFLUENCE OF STRATIFICATION ON ATTENUATION LAW OF BLASTING VIBRATION
SONG Quanjie1，LI Haibo1，LI Junru1，YAO Wensheng2，YANG Fengwei1，WANG Miao1
(1. State Key Laboratory of Geomechanics and Geotechnical Engineering，Institute of Rock and Soil Mechanics，Chinese Academy of Sciences，Wuhan，Hubei 430071，China；2. Shandong Nuclear Power Company Ltd.，Haiyang，Shandong 265116，China)
Abstract：Shandong Haiyang Nuclear Power Plant site contains multitudinous stratifications. On the basis of monitoring points? velocity of blasting vibration，the attenuation laws of blasting vibration in different directions to stratification are given out in the process of blasting excavation. It is concluded based on blasting experiment that the velocity of blasting vibration along the stratification strike is bigger than that perpendicular to the stratification strike with same distance and same excavation without considering the influence of blasting rear impact. What?s more，blasting vibration damped exponential increases when the angle between stratification strike and the line from monitoring points to explosive source makes larger. Therefore，the monitoring points need to be made sure on rational site in accordance with the site geological condition；and it is necessary to have several monitoring points when the site situation is complex.
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2012, Vol. 31 
