Comparative study on vibration characteristics of rock mass induced by bench blasting and pre-splitting blasting
Abstract：Based on Sadaovsk formula, the site monitoring data of rock mass induced by bench blasting and pre-splitting blasting in Taishan Nuclear Power Station was analyzed, and the results show that the K and α values of vibration velocity caused by pre-split blasting are larger than that of bench blasting within the scope of 20-200 m. Through dimensional analysis, the function relation between the vibration frequency and the charge weight per delay and distance from explosion was established. Furthermore, the rock vibration frequency of these two kinds of blasting was compared by means of regression analysis. The results show that the vibration frequency decreases with the in- creasing of charge weight per delay or distance from explosion. The rock vibration frequency of pre-splitting blasting is higher than bench blasting for the same explosion distance, and the gap becomes smaller with the increasing of maxi- mum charge weight per delay. The attenuation with distance of vibration frequency of pre-splitting blasting is more rap- id than bench blasting for the same maximum charge weight per delay.
Keywords：bench blastingpre-splitting blastingvibration velocityvibration frequencydimensional analysis
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( 1285-1291 )