Zonal Disintegration Mechanism of Deep Rock Masses under Coupled High Axial Geostress and Blasting Load
Joint Authors
Source
Issue
Vol. 2018, Issue 2018 (31 Dec. 2018), pp.1-11, 11 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2018-07-04
Country of Publication
Egypt
No. of Pages
11
Main Subjects
Abstract EN
Zonal disintegration phenomenon with alternative distribution of fracture zones and nonfracture zones is a characteristic failure in deep rock masses, especially for deep tunnel excavated by drill and blast method.
To investigate the mechanism of zonal disintegration under coupled high axial geostress and blasting load, elastic stress field distribution for a circular tunnel in deep isotropic rock masses is obtained.
Furthermore, Hoek-Brown criterion is amended by considering blast-induced damage effect.
Both radial blasting load and blast-induced damage effect are assumed to decay in a negative exponential function.
Taking the deep tunnel of Dingji coal mine in China as engineering background, the number and width of fracture zones are determined by deduced elastic stress field and modified Hoek-Brown criterion.
Then numerical computation is conducted.
Numerical computation results indicate that both the number and width of fracture zones mainly depend on high axial geostress and mechanical parameters of deep rock masses, and peak radial blasting load plays an important role in determining the width of fracture zone near the excavation.
American Psychological Association (APA)
Yuan, Pu& Xu, Ying. 2018. Zonal Disintegration Mechanism of Deep Rock Masses under Coupled High Axial Geostress and Blasting Load. Shock and Vibration،Vol. 2018, no. 2018, pp.1-11.
https://search.emarefa.net/detail/BIM-1215290
Modern Language Association (MLA)
Yuan, Pu& Xu, Ying. Zonal Disintegration Mechanism of Deep Rock Masses under Coupled High Axial Geostress and Blasting Load. Shock and Vibration No. 2018 (2018), pp.1-11.
https://search.emarefa.net/detail/BIM-1215290
American Medical Association (AMA)
Yuan, Pu& Xu, Ying. Zonal Disintegration Mechanism of Deep Rock Masses under Coupled High Axial Geostress and Blasting Load. Shock and Vibration. 2018. Vol. 2018, no. 2018, pp.1-11.
https://search.emarefa.net/detail/BIM-1215290
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1215290