Blast-Induced Damage on Millisecond Blasting Model Test with Multicircle Vertical Blastholes
Joint Authors
Ma, Qin-yong
Yuan, Pu
Zhang, Jing-shuang
Ma, Rui-qiu
Han, Bo
Source
Issue
Vol. 2015, Issue 2015 (31 Dec. 2015), pp.1-6, 6 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2015-05-21
Country of Publication
Egypt
No. of Pages
6
Main Subjects
Abstract EN
To investigate the blast-induced damage effect on surrounding rock in vertical shaft excavation, 4 kinds of millisecond blasting model tests with three-circle blastholes were designed and carried out with excavation blasting in vertical shaft as the background.
The longitudinal wave velocity on the side of concrete model was also measured before and after blasting.
Then blast damage factor was then calculated by measuring longitudinal wave velocity before and after blasting.
The test results show that the blast-induced damage factor attenuated gradually with the centre of three-circle blastholes as centre.
With the threshold value of 0.19 for blast-induced damage factor, blast-induced damage zones for 4 kinds of model tests are described and there is an inverted cone blast-induced damage zone in concrete model.
And analyses of cutting effect and blast-induced damage zone indicate that in order to minimize the blast-induced damage effect and ensure the cutting effect the reasonable blasting scheme for three-circle blastholes is the inner two-circle blastholes initiated simultaneously and the outer third circle blastholes initiated in a 25 ms delay.
American Psychological Association (APA)
Ma, Qin-yong& Yuan, Pu& Zhang, Jing-shuang& Ma, Rui-qiu& Han, Bo. 2015. Blast-Induced Damage on Millisecond Blasting Model Test with Multicircle Vertical Blastholes. Shock and Vibration،Vol. 2015, no. 2015, pp.1-6.
https://search.emarefa.net/detail/BIM-1078181
Modern Language Association (MLA)
Ma, Qin-yong…[et al.]. Blast-Induced Damage on Millisecond Blasting Model Test with Multicircle Vertical Blastholes. Shock and Vibration No. 2015 (2015), pp.1-6.
https://search.emarefa.net/detail/BIM-1078181
American Medical Association (AMA)
Ma, Qin-yong& Yuan, Pu& Zhang, Jing-shuang& Ma, Rui-qiu& Han, Bo. Blast-Induced Damage on Millisecond Blasting Model Test with Multicircle Vertical Blastholes. Shock and Vibration. 2015. Vol. 2015, no. 2015, pp.1-6.
https://search.emarefa.net/detail/BIM-1078181
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1078181