The Elevation Effect of Vibration Induced by Pneumatic Rock Breaking with Carbon Dioxide Ice Powder

Abstract

In traditional explosive blasting, the elevation amplification effect is an important aspect that cannot be ignored in the study of vibration disasters. Compared with this type of vibration, the elevation amplification effect of vibration induced by pneumatic rock breaking with carbon dioxide ice pow-der was explored through on-site vibration monitoring experiments. The results showed peak particle velocity increased when the sensor was higher than the vibration source, indicating that vibration induced by pneumatic rock breaking with carbon dioxide ice powder, like explosive blasting, has an elevation amplification effect. However, the elevation effect of vibration induced by pneumatic rock breaking with carbon dioxide ice powder mainly manifests as an amplification of the ow-frequency vibration component, suppressing and weakening the high-frequency vibration. Others, the elevation amplification effect is only reflected within a certain distance. As the distance to the vibration source increases, peak particle velocity returns to its standard value and follows the existing attenuation rule. The elevation factor no longer affects the propagation and attenuation of vibration within the rock mass.