Experimental study on vibration reduction of the hole-bottom air space charging
Abstract：In order to study the best air-decking ratio of the hole-bottom air space charging to reduce blasting vibration effect, a field experiment was conducted. First, based on the experimental data, using wavelet decomposition combined with the AOK time-frequency representation,peak particle velocity of blasting seismic waves, dominant frequency, duration of dominant frequency, duration of preponderant frequency and frequency-band energy ratio was studied under different air-decking ratio. The results show that, with the increase of air-decking ratio, peak particle velocity of blasting seismic waves and dominant frequency are decreasing, duration of dominant frequency and duration of dominant frequency are increasing, and frequency-band energy ratio is developing toward low frequency. Then, with 7. 812 5- 15.625 0 Hz frequency-band energy which is closed to natural frequency of buildings as the indicator, the best airdecking ratio to reduce blasting vibration has been selected, and combined with practical work, the feasibility and effectiveness of the method were proved.
Keywords：blasting vibrationborehole-bottom cavityair-decking ratiowavelet decompositionAOK time-frequencyrepresentationtime-frequency characteristicsenergy distribution
Publication Date：2012-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：7( 944-950 )