In Situ Stress Effects on Smooth Blasting: Model Test and Analysis
Joint Authors
Yang, Renshu
Fang, Shizheng
Yang, Aiyun
Xie, Huanzhen
Yang, Liyun
Source
Issue
Vol. 2020, Issue 2020 (31 Dec. 2020), pp.1-14, 14 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2020-01-07
Country of Publication
Egypt
No. of Pages
14
Main Subjects
Abstract EN
Most of the roadway excavation is completed by the drilling and blasting method.
With the increase of buried depth, the existence of ground stress will generate a significant impact on the rock blasting, especially on the smooth blasting.
In this study, self-made homogeneous similar materials and digital image correlation methods were used to determine influence of ground stress on the smooth blasting under uniform explosive charge parameters and various in situ stress conditions.
The results show that the crack outline after blasting changes from zigzag to straight in shape, and multifractal calculation results of the rupture section between blastholes show that the fracture surface becomes flatter as ground stress increases, which is conducive to roadway formation.
The strain and equivalent strain rate obviously decrease as the distance between the blasthole and measuring points increases.
The same trend occurs as the confining pressure goes up.
Meanwhile, a postexplosion acoustic wave test indicates that confining pressure inhibits damage of the retained rock, which is consistent with strain and equivalent strain rate results.
Finally, we discussed the crack propagation mechanism of rock in smooth blasting.
American Psychological Association (APA)
Yang, Renshu& Fang, Shizheng& Yang, Aiyun& Xie, Huanzhen& Yang, Liyun. 2020. In Situ Stress Effects on Smooth Blasting: Model Test and Analysis. Shock and Vibration،Vol. 2020, no. 2020, pp.1-14.
https://search.emarefa.net/detail/BIM-1209705
Modern Language Association (MLA)
Yang, Renshu…[et al.]. In Situ Stress Effects on Smooth Blasting: Model Test and Analysis. Shock and Vibration No. 2020 (2020), pp.1-14.
https://search.emarefa.net/detail/BIM-1209705
American Medical Association (AMA)
Yang, Renshu& Fang, Shizheng& Yang, Aiyun& Xie, Huanzhen& Yang, Liyun. In Situ Stress Effects on Smooth Blasting: Model Test and Analysis. Shock and Vibration. 2020. Vol. 2020, no. 2020, pp.1-14.
https://search.emarefa.net/detail/BIM-1209705
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1209705