A study of the effect of rock bridges on blast-induced wave propagation in jointed media

A. Mortazavi, M. Sharafisafa

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Citation (Scopus)

Abstract

Rock mass consist of intact rock and discontinuities such as faults, joints and bedding planes. The presence of such discontinuities in rock mass dominates the response of jointed rock mass to static and dynamic loading. These structural weak planes seriously hinder and affect the propagation of stress waves in rock mass. The joints parameters such as persistence, orientation, distribution patterns, spacing and filling material have a significant effect on the response of rock mass against wave propagation. In most studies of blast-induced wave propagation in jointed rock mass, it is assumed that the joints are continuous. In many situations the rock mass consists of non-continuous joints and rock bridges. Rock bridges and discontinuous joints have a different effect on wave and fracture propagation in the blasting process. With regard to the complexities associated with rock blasting, in particular in jointed media, numerical tools are viable alternatives for rock blasting analysis. In this study the DEM method was employed to investigate the effects of rock bridges on blast-induced wave propagation. A plain strain 2D scenario was assumed and a single blasthole explosion was simulated. The analysis results show that the stress concentration at the rock bridge location leads to excessive fracturing. This effect is more visible at the free face where the stress wave reflection occurs.

Original languageEnglish
Title of host publicationRock Fragmentation by Blasting, FRAGBLAST 10 - Proceedings of the 10th International Symposium on Rock Fragmentation by Blasting
Pages295-299
Number of pages5
Publication statusPublished - Jan 1 2013
Externally publishedYes
Event10th International Symposium on Rock Fragmentation by Blasting, FRAGBLAST 10 - New Delhi, India
Duration: Nov 24 2012Nov 25 2012

Publication series

NameRock Fragmentation by Blasting, FRAGBLAST 10 - Proceedings of the 10th International Symposium on Rock Fragmentation by Blasting

Conference

Conference10th International Symposium on Rock Fragmentation by Blasting, FRAGBLAST 10
CountryIndia
CityNew Delhi
Period11/24/1211/25/12

Fingerprint

Wave propagation
wave propagation
Rocks
rock
Blasting
blasting
effect
discontinuity
fracture propagation
wave reflection
bedding plane
Explosions
digital elevation model
Stress concentration
explosion
spacing
persistence

ASJC Scopus subject areas

  • Geotechnical Engineering and Engineering Geology

Cite this

Mortazavi, A., & Sharafisafa, M. (2013). A study of the effect of rock bridges on blast-induced wave propagation in jointed media. In Rock Fragmentation by Blasting, FRAGBLAST 10 - Proceedings of the 10th International Symposium on Rock Fragmentation by Blasting (pp. 295-299). (Rock Fragmentation by Blasting, FRAGBLAST 10 - Proceedings of the 10th International Symposium on Rock Fragmentation by Blasting).

A study of the effect of rock bridges on blast-induced wave propagation in jointed media. / Mortazavi, A.; Sharafisafa, M.

Rock Fragmentation by Blasting, FRAGBLAST 10 - Proceedings of the 10th International Symposium on Rock Fragmentation by Blasting. 2013. p. 295-299 (Rock Fragmentation by Blasting, FRAGBLAST 10 - Proceedings of the 10th International Symposium on Rock Fragmentation by Blasting).

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Mortazavi, A & Sharafisafa, M 2013, A study of the effect of rock bridges on blast-induced wave propagation in jointed media. in Rock Fragmentation by Blasting, FRAGBLAST 10 - Proceedings of the 10th International Symposium on Rock Fragmentation by Blasting. Rock Fragmentation by Blasting, FRAGBLAST 10 - Proceedings of the 10th International Symposium on Rock Fragmentation by Blasting, pp. 295-299, 10th International Symposium on Rock Fragmentation by Blasting, FRAGBLAST 10, New Delhi, India, 11/24/12.
Mortazavi A, Sharafisafa M. A study of the effect of rock bridges on blast-induced wave propagation in jointed media. In Rock Fragmentation by Blasting, FRAGBLAST 10 - Proceedings of the 10th International Symposium on Rock Fragmentation by Blasting. 2013. p. 295-299. (Rock Fragmentation by Blasting, FRAGBLAST 10 - Proceedings of the 10th International Symposium on Rock Fragmentation by Blasting).
Mortazavi, A. ; Sharafisafa, M. / A study of the effect of rock bridges on blast-induced wave propagation in jointed media. Rock Fragmentation by Blasting, FRAGBLAST 10 - Proceedings of the 10th International Symposium on Rock Fragmentation by Blasting. 2013. pp. 295-299 (Rock Fragmentation by Blasting, FRAGBLAST 10 - Proceedings of the 10th International Symposium on Rock Fragmentation by Blasting).
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