Strain Rockbursts Simulated by Low-Strength Brittle Equivalent Materials
Joint Authors
Fan, Pengxian
Wang, Mingyang
Li, Lang
Jiang, Haiming
Cheng, Yihao
Wang, Derong
Source
Advances in Materials Science and Engineering
Issue
Vol. 2016, Issue 2016 (31 Dec. 2016), pp.1-11, 11 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2016-08-10
Country of Publication
Egypt
No. of Pages
11
Abstract EN
This paper presents experimental study on rockbursts that occur in deep underground excavations.
To begin with, the boundary conditions for excavation in deep underground engineering were analysed and elastic adaptive boundary is an effective way to minimize the boundary effect of geomechanical model test.
Then, in order to simulate an elastic adaptive loading boundary, Belleville springs were used to establish this loading boundary.
With the aforementioned experimental set-ups and fabrication of similarity models for test, the phenomena of strain mode rockbursts were satisfactorily reproduced in laboratory.
The internal stress, strain, and convergences of the openings of the model were instrumented by subtly preembedded sensors and transducers.
Test results showed that, with an initial state of high stress from both upper layers’ gravitational effects and in situ stress due to tectonic movements, the excavation brings a dramatic rise in the hoop stress and sharp drop in radial stress, which leads to the splitting failure of rock mass.
Finally a rockburst occurred associated with the release of strain energy stored in highly stressed rock mass.
In addition, the failure of the surrounding rock demonstrated an obvious hysteresis effect which supplies valuable guide and reference for tunnel support.
Not only do these results provide a basis for further comprehensive experiments, but also the data can offer assisting aids for further theoretical study of rockbursts.
American Psychological Association (APA)
Li, Lang& Wang, Mingyang& Fan, Pengxian& Jiang, Haiming& Cheng, Yihao& Wang, Derong. 2016. Strain Rockbursts Simulated by Low-Strength Brittle Equivalent Materials. Advances in Materials Science and Engineering،Vol. 2016, no. 2016, pp.1-11.
https://search.emarefa.net/detail/BIM-1096208
Modern Language Association (MLA)
Li, Lang…[et al.]. Strain Rockbursts Simulated by Low-Strength Brittle Equivalent Materials. Advances in Materials Science and Engineering No. 2016 (2016), pp.1-11.
https://search.emarefa.net/detail/BIM-1096208
American Medical Association (AMA)
Li, Lang& Wang, Mingyang& Fan, Pengxian& Jiang, Haiming& Cheng, Yihao& Wang, Derong. Strain Rockbursts Simulated by Low-Strength Brittle Equivalent Materials. Advances in Materials Science and Engineering. 2016. Vol. 2016, no. 2016, pp.1-11.
https://search.emarefa.net/detail/BIM-1096208
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1096208