Research on the Development Mechanism of Postpeak Cracks in Sandstone under Different Confining Pressures
Joint Authors
Wang, Lianguo
Chen, Jiarui
Dong, Yun
Zhang, Jihua
Sun, Huasheng
Chen, Yadong
Jiang, Yang
Fan, Yuqing
Source
Mathematical Problems in Engineering
Issue
Vol. 2019, Issue 2019 (31 Dec. 2019), pp.1-10, 10 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2019-05-02
Country of Publication
Egypt
No. of Pages
10
Main Subjects
Abstract EN
Water inrush happens occasionally during deeper roadways excavation.
It is mainly due to the lack of understanding in the formation and development mechanism of cracks and its spatial distribution pattern under ground stress.
In view of this, this paper used different stress levels to represent the fracture state of different parts of the surrounding rock of the deep roadway; CT detection technique is used to scan the fractured sandstone in the postpeak state; and the CT images under different confining pressures are thus obtained.
The geometrical parameters such as area, length, and width of the crack are used to describe the distribution patterns based on CT images processing technique and statistical principle.
These patterns are then analyzed under varying postpeak stress levels and confining pressures.
The result shows that, as the area, length, and width of the cracks get larger, number of cracks increases with decreasing stress level; at different stress levels, sandstone crack area probability density, crack length probability density, and crack width probability density form exceptional, linear, and Gaussian distribution, respectively.
The amount of confining pressure affects the size of cracks and the extent of expansion.
This means that the higher the confining pressure is, the easier the internal crack will be penetrated and expanded and the bigger the cracks are, and the number of cracks gets lesser.
Such research results can be used to describe the propagation and evolution law of cracks under different stress states of postpeak rock, which also provide an important basis for further analysis of its permeability and the stability of roadway surrounding rock.
American Psychological Association (APA)
Zhang, Jihua& Chen, Yadong& Jiang, Yang& Sun, Huasheng& Chen, Jiarui& Fan, Yuqing…[et al.]. 2019. Research on the Development Mechanism of Postpeak Cracks in Sandstone under Different Confining Pressures. Mathematical Problems in Engineering،Vol. 2019, no. 2019, pp.1-10.
https://search.emarefa.net/detail/BIM-1196402
Modern Language Association (MLA)
Chen, Yadong…[et al.]. Research on the Development Mechanism of Postpeak Cracks in Sandstone under Different Confining Pressures. Mathematical Problems in Engineering No. 2019 (2019), pp.1-10.
https://search.emarefa.net/detail/BIM-1196402
American Medical Association (AMA)
Zhang, Jihua& Chen, Yadong& Jiang, Yang& Sun, Huasheng& Chen, Jiarui& Fan, Yuqing…[et al.]. Research on the Development Mechanism of Postpeak Cracks in Sandstone under Different Confining Pressures. Mathematical Problems in Engineering. 2019. Vol. 2019, no. 2019, pp.1-10.
https://search.emarefa.net/detail/BIM-1196402
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1196402