Altitude effect of blasting vibration on high rock slope belonging to thin mountain in urban area
To examine blasting vibration characteristics of high and thin rock slopes with a special geometry,the blasting vibration monitoring on the high and thin rock slope belonging to Chiwan Mountain was conducted during field leveling of Chiwan parking lot.The distribution laws of PPV and dominant frequency were then investigated,the formulae for predicting PPV and dominant frequency were fitted,and the altitude effect of blasting vibration was clarified.The results show that the PPV at the inner berm side of the thin and high rock slope first decays and then rises with the increasing horizontal distance from blasting source and the relative altitude difference,and there is an evident altitude amplification effect above a certain altitude.The PPV at the slope top is about 3 to 8 times of that at the slope toe.The dominant frequency first decays and then fluctuates with the increasing horizontal distance and the relative altitude difference,and the dominant frequency keeps about 25 Hz above a certain altitude.The altitude effect of blasting vibration on the thin and high rock slope is related to the topography of the thin and high rock slope,and it is hardly represented by the relevant PPV and dominant frequency formulae for the thick and high rock slope.
high rock slopethin mountainblasting vibrationdominant frequencyaltitude effect
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