Determination of blast-induced ground vibration equations for rocks using mechanical and geological properties

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• 作者：Ranjan Kumar^a ; ^bAuthor Vitae ; Deepankar Choudhury^a ; ^c ; ^{dc@civil.iitb.ac.in" class="auth_mail" title="E-mail the corresponding author} ; ^{dchoudhury@iitb.ac.in" class="auth_mail" title="E-mail the corresponding author}Author Vitae ; Kapilesh Bhargava^d ; ^eAuthor Vitae
• 关键词：Blast loads ; Empirical equations ; Rock quality designation (RQD) ; Unit weight ; Peak particle velocity (PPV) ; Uniaxial compressive strength (UCS) ; Geological strength index (GSI)
• 刊名：Journal of Rock Mechanics and Geotechnical Engineering
• 出版年：2016
• 出版时间：June 2016
• 年：2016
• 卷：8
• 期：3
• 页码：341-349
• 全文大小：1187 K

文摘

In the recent decades, effects of blast loads on natural and man-made structures have gained considerable attention due to increase in threat from various man-made activities. Site-specific empirical relationships for calculation of blast-induced vibration parameters like peak particle velocity (PPV) and peak particle displacement (PPD) are commonly used for estimation of blast loads in design. However, these relationships are not able to consider the variation in rock parameters and uncertainty of in situ conditions. In this paper, a total of 1089 published blast data of various researchers in different rock sites have been collected and used to propose generalized empirical model for PPV by considering the effects of rock parameters like unit weight, rock quality designation (RQD), geological strength index (GSI), and uniaxial compressive strength (UCS). The proposed PPV model has a good correlation coefficient and hence it can be directly used in prediction of blast-induced vibrations in rocks. Standard errors and coefficient of correlations of the predicted blast-induced vibration parameters are obtained with respect to the observed field data. The proposed empirical model for PPV has also been compared with the empirical models available for blast vibrations predictions given by other researchers and found to be in good agreement with specific cases.