Dependency of blast-induced ground vibration on the concentration and distribution of explosive charge in surface blasting

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Authors

  • Dayamoy Garai
     ,IN
  • Hemant Agrawal
     ,IN
  • A.K. Mishra
     ,IN

DOI:

https://doi.org/10.18311/jmmf/2022/29654

Keywords:

Blast-induced ground vibration, charge concentration, charge distribution, explosives, peak particle velocity

Abstract

Blast-induced ground vibration has always been a subject of concern for blasting engineers. Since many decades, a lot of research work has been carried out to identify the factors resulting in higher ground vibrations and are also optimized to reduce the ground vibration due to blasting. Explosives are charged in holes which are drilled in a particular pattern for distribution of energy of explosives and delays are provided between charged holes to utilize the explosive energy in efficient way and get the desired results. The effect of charge concentration and distribution on blast induced ground vibration still require verification with proper experimentations on field. This paper deals in understanding the influence of maximum instantaneous charge on blastinduced ground vibration in surface blasting while varying the charge concentration and distribution. With field experimentations and investigations, it has been found that the blast-induced ground vibration results at same scaled distance in terms of PPV values were different with different charge distribution. On the basis of obtained results, a new empirical relation has been developed based on charge distribution for computation of effective explosive weight per delay for multi hole simultaneous firing. The developed relation has also been validated in a different geological condition in a separate mine.

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Published

2022-02-24

How to Cite

Garai, D., Agrawal, H., & Mishra, A. (2022). Dependency of blast-induced ground vibration on the concentration and distribution of explosive charge in surface blasting. Journal of Mines, Metals and Fuels, 70(1), 11–17. https://doi.org/10.18311/jmmf/2022/29654

Issue

Volume 70, Issue 1, January 2022

Section

Articles
Crossref
Scopus
Google Scholar
Europe PMC
Received 2022-02-24
Accepted 2022-02-24
Published 2022-02-24

 

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