A numerical study on 2-D compressive wave propagation in rock masses with a set of joints along the radial direction normal to the joints

W. D. Lei, A. M. Hefny, S. Yan, J. Teng

Research output: Contribution to journalArticlepeer-review

16 Citations (Scopus)

Abstract

An explosion in a borehole or an accidental explosion in a tunnel will generate a two-dimensional (2-D) compressive wave that travels through the surrounding rock mass. For the problem of 2-D compressive wave propagation in a rock mass with parallel joints in the radial direction normal to the joints, parametric studies on the transmission ratio and the maximum rebound ratio are performed in universal distinct element code. The variation of the transmission ratio with the ratio of joint spacing to wavelength is generalized into a characteristic curve, which can be used as a prediction model for estimating the transmission ratio. The relationship between the maximum rebound ratio and the influence factors is obtained in charts. The charts can be used as a prediction model for estimating the maximum rebound ratio. The proposed prediction models for estimating the transmission ratio and the maximum rebound ratio are applied to a field explosion test, Mandai test in Singapore. The minimum possible values of peak particle velocity (PPV) at the monitoring points are estimated by using the proposed prediction model for estimating the transmission ratio along the radial direction normal to the joints. On the other hand, the maximum possible values of PPV are estimated by using the proposed prediction model for estimating the maximum rebound ratio along the same radial direction. The comparison shows a good agreement between the field-recorded PPVs and the estimated range of PPVs given by the minimum possible PPVs and the maximum possible PPVs at the monitoring points in Mandai test. The good agreement between the estimated and field-recorded values validates the proposed prediction models for estimating peak particle velocity in a rock mass with a set of joints due to application of a compressive wave at the boundary of a tunnel or a borehole.

Original languageEnglish
Pages (from-to)508-523
Number of pages16
JournalComputers and Geotechnics
Volume34
Issue number6
DOIs
Publication statusPublished - Nov 2007
Externally publishedYes

Keywords

  • 2-D compressive wave
  • Field explosion test
  • Maximum rebound ratio
  • Stiffness of joint
  • Transmission ratio

ASJC Scopus subject areas

  • Geotechnical Engineering and Engineering Geology
  • Computer Science Applications

Fingerprint

Dive into the research topics of 'A numerical study on 2-D compressive wave propagation in rock masses with a set of joints along the radial direction normal to the joints'. Together they form a unique fingerprint.

Cite this