Study on Ultrasonic Response to Mechanical Structure of Coal under Loading and Unloading Condition
Joint Authors
Liu, Xiaofei
Wang, Enyuan
Wang, Xiaoran
Liu, Zhentang
Xu, Xiaoyang
Source
Issue
Vol. 2017, Issue 2017 (31 Dec. 2017), pp.1-12, 12 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2017-01-09
Country of Publication
Egypt
No. of Pages
12
Main Subjects
Abstract EN
Ultrasonic technology can be applied to study the changes in the internal defects of coal under quantitative loading, which can provide the theoretical basis for applying the technology to determine the structural stability of coal and predict disasters related to the dynamics of coal or rock.
In this paper, to investigate the propagation laws of ultrasonic signals through a coal material under various loading conditions, an ultrasonic test system for the deformation and fracture of coal rock was used and a cyclic loading and unloading pattern is adopted.
In addition, changes in ultrasonic parameters such as amplitude, dominant frequency, and velocity were analyzed.
At the initial loading stage, the ultrasonic amplitude, amplitude of the dominant frequency, and wave velocity slightly decrease as the loading process progresses, and these three ultrasonic parameters gradually increase to their maxima when the stress level reaches approximately 46%.
When it progresses from the linear elastic stage to the elastic plastic stage, the material inside the coal distorts and fractures more drastically, the inner defects are fully developed, and the acoustic parameters decrease significantly.
Therefore, the corresponding measures should be adapted to reduce the loading stress before the coal is loaded to its critical stress level.
American Psychological Association (APA)
Liu, Xiaofei& Wang, Xiaoran& Wang, Enyuan& Liu, Zhentang& Xu, Xiaoyang. 2017. Study on Ultrasonic Response to Mechanical Structure of Coal under Loading and Unloading Condition. Shock and Vibration،Vol. 2017, no. 2017, pp.1-12.
https://search.emarefa.net/detail/BIM-1204999
Modern Language Association (MLA)
Liu, Xiaofei…[et al.]. Study on Ultrasonic Response to Mechanical Structure of Coal under Loading and Unloading Condition. Shock and Vibration No. 2017 (2017), pp.1-12.
https://search.emarefa.net/detail/BIM-1204999
American Medical Association (AMA)
Liu, Xiaofei& Wang, Xiaoran& Wang, Enyuan& Liu, Zhentang& Xu, Xiaoyang. Study on Ultrasonic Response to Mechanical Structure of Coal under Loading and Unloading Condition. Shock and Vibration. 2017. Vol. 2017, no. 2017, pp.1-12.
https://search.emarefa.net/detail/BIM-1204999
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1204999