Attenuation of blasting induced peak particle velocity: Constructing a new empirical formula

K. M. Cheng, Kam Tim Chau

Research output: Chapter in book / Conference proceedingConference article published in proceeding or bookAcademic researchpeer-review

1 Citation (Scopus)

Abstract

Blasting is considered as one of the most economical ways of producing aggregate by breaking rock mass in mines and quarries. However, blasting always induces unwanted vibrations to nearby civil engineering structures, such as buildings. For vibration controls, Peak Particle Velocity (PPV) is found empirically related to damages of buildings and, thus, is the commonly adopted parameter used in vibration monitoring and control. Since 1960s, a commonly adopted empirical formula for predicting PPV is expressed in terms of a power law of the so-called scaled distance (D), which is defined as D=R/W1/2with R being the distance of the observation station from the explosive source (in meter) and W being the maximum charge per delay (in kilogram of explosive). However, such empirical formula is dimensionally dependent (i.e. The empirical constant is unit dependent). In this study, a dimensional analysis was used in constructing a new dimensionless empirical formula for normalized PPV, taking explosion energy (E), duration time (t), density of the rock (ρ) into account. Five hundred blast data from the Site Formation Project of the Anderson Road Quarry in Hong Kong were used for correlation analysis using both the traditional and the new dimensionless formulas. For the same set of 500 data, the new dimensionless formula gives a correlation coefficient value of 0.9509 whereas the conventional one gives a value of 0.7607, showing that the proposed formula is dimensionally correct and reflects velocity attenuation much better than the conventional one.
Original languageEnglish
Title of host publicationComputer Methods and Recent Advances in Geomechanics - Proc. of the 14th International Conference of International Association for Computer Methods and Recent Advances in Geomechanics, IACMAG 2014
PublisherTaylor and Francis - Balkema
Pages749-754
Number of pages6
ISBN (Print)9781138001480
Publication statusPublished - 1 Jan 2015
Event14th International Conference of International Association for Computer Methods and Recent Advances in Geomechanics, IACMAG 2014 - Kyoto, Japan
Duration: 22 Sep 201425 Sep 2014

Conference

Conference14th International Conference of International Association for Computer Methods and Recent Advances in Geomechanics, IACMAG 2014
Country/TerritoryJapan
CityKyoto
Period22/09/1425/09/14

ASJC Scopus subject areas

  • Computer Science Applications
  • Geochemistry and Petrology

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