Study on the Dynamic Response Characteristics of Cylindrical Coal-Rock Samples under Dynamic Loads
Joint Authors
Wu, Yan
Zhu, Hongqing
Fang, Shuhao
Zhang, Yilong
Source
Issue
Vol. 2020, Issue 2020 (31 Dec. 2020), pp.1-12, 12 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2020-12-16
Country of Publication
Egypt
No. of Pages
12
Main Subjects
Abstract EN
To research the dynamic response characteristics of cylindrical coal-rock samples under impact loads, the impact of rigid bars on cylindrical coal-rock samples is simulated under different speed conditions, based on LS-DYNA software, and the dynamic distribution characteristics of the stress, strain, and energy of cylindrical coal-rock samples are analyzed.
The results demonstrated the following: (1) the cylindrical coal-rock sample failed at the center first, and the damage developed downward along the axial direction.
(2) The critical effective stress and strain have an exponential function relationship with the velocity, and the critical time has a linear relationship with the velocity.
(3) The energy change law of the cylindrical coal-rock sample is consistent with the destruction morphology.
(4) The axial stress peaks in the severe damage part have a linear relationship with the speed, the axial stress attenuates rapidly after passing the stress yield point, and the axial strain does not increase continuously.
(5) The peaks stress and strain on the central axis and the radial line obey the power function distribution, the axial stress produces tensile stress in the axial propagation direction, and the axial stress and strain peaks at the same position are larger than those of the radial stress and strain peaks.
This research provides a reference for studying coal and rock dynamic disasters.
American Psychological Association (APA)
Zhu, Hongqing& Fang, Shuhao& Zhang, Yilong& Wu, Yan. 2020. Study on the Dynamic Response Characteristics of Cylindrical Coal-Rock Samples under Dynamic Loads. Shock and Vibration،Vol. 2020, no. 2020, pp.1-12.
https://search.emarefa.net/detail/BIM-1212656
Modern Language Association (MLA)
Zhu, Hongqing…[et al.]. Study on the Dynamic Response Characteristics of Cylindrical Coal-Rock Samples under Dynamic Loads. Shock and Vibration No. 2020 (2020), pp.1-12.
https://search.emarefa.net/detail/BIM-1212656
American Medical Association (AMA)
Zhu, Hongqing& Fang, Shuhao& Zhang, Yilong& Wu, Yan. Study on the Dynamic Response Characteristics of Cylindrical Coal-Rock Samples under Dynamic Loads. Shock and Vibration. 2020. Vol. 2020, no. 2020, pp.1-12.
https://search.emarefa.net/detail/BIM-1212656
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1212656