露天掘鉱山における振動レベルの推定

概要

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The purpose of this study is to propose a predictor of the vibration level (VL). First, we measured hundreds of accelerograms of ground vibration caused by open pit blastings. VLs were obtained from these accelerograms by the vibration level meter. To estimate the VL, three variables that were considered to be closely connected with VL were chosen, namely, average charge/detonator, W (kg), average time delay. T (ms), distance from the source. D (m), and we assumed the predictor for the VL as follows; VL=KW^αD^<-β>T^<-γ> Then, we carried out multi-regression analysis using the above equation. The result was VL=156W^<0.136>D^<-0.228>T^<-0.029> The coefficient of determination of this equation is 0.75. It should be emphasized that the attenuation factor of the VL is 0.228,and this magnitude is nearly one-tenth of the average value for the peak particle velocity, β=2.0.
山口大学の論文