![](/images/graphics-bg.png)
Study on the Porosity of Saturated Fragmentized Coals during Creep Process and Constitutive Relation
Joint Authors
Ma, Zhanguo
Gong, Peng
Cheng, Shixing
Chen, Yongheng
Li, Kelong
Source
Issue
Vol. 2020, Issue 2020 (31 Dec. 2020), pp.1-10, 10 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2020-10-19
Country of Publication
Egypt
No. of Pages
10
Main Subjects
Abstract EN
Pore abundance and deformation characteristics of saturated fragmentized coals during creep process are of significant meaning to the study on ground sediment in the mined-out area.
The law of porosity variation of saturated fragmentized coals during creep process and its creep constitutive model were studied by using the self-developed multiphase coupling creep test device.
And, results have indicated that the porosity logarithm of fragmentized coal during creep process shows a linear negative correlation with the time ln(n−a) = −ct + lnb, and the porosity decrease is evidently divided into three phases.
In addition, when the stress level is relatively low, the porosity decreases slowly; when the stress level rises up, the porosity decreases quickly; when the stress level remains stable finally, the porosity is smaller.
Under the equal stress, as the grain size of fragmentized coals decreases, the porosity tends to decrease, and as the grain size of fragmentized coal tends to be stable, the porosity tends to increase; the creep constitutive equation of fragmentized coals with different grain sizes was established by using the Kelvin–Voigt model, and the correlation analysis shows that the Kelvin–Voigt creep model of fragmentized coals is reasonable.
American Psychological Association (APA)
Gong, Peng& Ma, Zhanguo& Chen, Yongheng& Cheng, Shixing& Li, Kelong. 2020. Study on the Porosity of Saturated Fragmentized Coals during Creep Process and Constitutive Relation. Advances in Civil Engineering،Vol. 2020, no. 2020, pp.1-10.
https://search.emarefa.net/detail/BIM-1124015
Modern Language Association (MLA)
Gong, Peng…[et al.]. Study on the Porosity of Saturated Fragmentized Coals during Creep Process and Constitutive Relation. Advances in Civil Engineering No. 2020 (2020), pp.1-10.
https://search.emarefa.net/detail/BIM-1124015
American Medical Association (AMA)
Gong, Peng& Ma, Zhanguo& Chen, Yongheng& Cheng, Shixing& Li, Kelong. Study on the Porosity of Saturated Fragmentized Coals during Creep Process and Constitutive Relation. Advances in Civil Engineering. 2020. Vol. 2020, no. 2020, pp.1-10.
https://search.emarefa.net/detail/BIM-1124015
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1124015