Influence of Geostress Orientation on Fracture Response of Deep Underground Cavity Subjected to Dynamic Loading
Joint Authors
Source
Issue
Vol. 2015, Issue 2015 (31 Dec. 2015), pp.1-9, 9 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2015-08-19
Country of Publication
Egypt
No. of Pages
9
Main Subjects
Abstract EN
Deep underground cavity is often damaged under the combined actions of high excavating-induced local stresses and dynamic loading.
The fracturing zone and failure type are much related to the initial geostress state.
To investigate the influence of geostress orientation on fracture behaviours of underground cavity due to dynamic loading, implicit to explicit sequential solution method was performed in the numerical code to realize the calculation of geostress initialization and dynamic loading on deep underground cavity.
The results indicate that when the geostress orientation is heterotropic to the roadway’s floor face (e.g., 30° or 60°), high stress and strain energy concentration are presented in the corner and the spandrel of the roadway, where V-shaped rock failure occurs with the release of massive energy in a very short time.
When the geostress orientation is orthogonal to the roadway (e.g., 0° or 90°), the tangential stress and strain energy distribute symmetrically around the cavity.
In this regard, the stored strain energy is released slowly under the dynamic loading, resulting in mainly parallel fracture along the roadway’s profile.
Therefore, to minimize the damage extent of the surrounding rock, it is of great concern to design the best excavation location and direction of new-opened roadway based on the measuring data of in situ geostresses.
American Psychological Association (APA)
Weng, Lei& Li, Xibing& Tao, Ming. 2015. Influence of Geostress Orientation on Fracture Response of Deep Underground Cavity Subjected to Dynamic Loading. Shock and Vibration،Vol. 2015, no. 2015, pp.1-9.
https://search.emarefa.net/detail/BIM-1078201
Modern Language Association (MLA)
Weng, Lei…[et al.]. Influence of Geostress Orientation on Fracture Response of Deep Underground Cavity Subjected to Dynamic Loading. Shock and Vibration No. 2015 (2015), pp.1-9.
https://search.emarefa.net/detail/BIM-1078201
American Medical Association (AMA)
Weng, Lei& Li, Xibing& Tao, Ming. Influence of Geostress Orientation on Fracture Response of Deep Underground Cavity Subjected to Dynamic Loading. Shock and Vibration. 2015. Vol. 2015, no. 2015, pp.1-9.
https://search.emarefa.net/detail/BIM-1078201
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1078201