11:30 AM - 11:45 AM
[S02-2-05] Using empirical relationships to predict PPV for surface explosions
Demolition sites have always been located in very remote areas, but with the ever increasing number of dwellings that are migrating towards these sites, monitoring of the ground vibrations has become a priority.
This study monitored explosions from demolition ranges, by recording the ground motions generated, amount of explosive used and the distance from the source to each of the seismograph stations. The peak particle velocity (PPV) versus scaled distance (SD) values for each explosion and station were plotted and a multiple regression analysis utilized to obtain the equation parameters, or site constants for three predictor equations; the United States Bureau of Mines (USBM) equation, the Ambraseys-Hendron equation and the Langefors-Kihlstrom equation.
The data obtained is very scattered, but the higher coefficients of determination (R2) indicate that the site constants obtained using the USBM equation show better fits than for the other relations. In addition, the geological constants for many of the regions are similar for the USBM equation, thus it would seem that the USBM is the more reliable predictive equation to use for each of these sites. However, since most of the energy escapes into the atmosphere during blasting on the surface, one should caution against using the predictive equations designed for mining and excavation in the bedrock.
This study monitored explosions from demolition ranges, by recording the ground motions generated, amount of explosive used and the distance from the source to each of the seismograph stations. The peak particle velocity (PPV) versus scaled distance (SD) values for each explosion and station were plotted and a multiple regression analysis utilized to obtain the equation parameters, or site constants for three predictor equations; the United States Bureau of Mines (USBM) equation, the Ambraseys-Hendron equation and the Langefors-Kihlstrom equation.
The data obtained is very scattered, but the higher coefficients of determination (R2) indicate that the site constants obtained using the USBM equation show better fits than for the other relations. In addition, the geological constants for many of the regions are similar for the USBM equation, thus it would seem that the USBM is the more reliable predictive equation to use for each of these sites. However, since most of the energy escapes into the atmosphere during blasting on the surface, one should caution against using the predictive equations designed for mining and excavation in the bedrock.