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Impact Dynamic Properties and Energy Evolution of Damaged Sandstone Based on Cyclic Loading Threshold
Joint Authors
Zheng, Qiangqiang
Zong, Qi
Yuan, Anying
Hu, Hao
Li, Mengyao
Wang, Haibo
Wang, Mengxiang
Zhang, Shouyang
Source
Issue
Vol. 2020, Issue 2020 (31 Dec. 2020), pp.1-12, 12 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2020-11-29
Country of Publication
Egypt
No. of Pages
12
Main Subjects
Abstract EN
Rocks in deep coal mines are usually in varying degrees of damage state before they are destabilized by impact loads such as rock bursts.
For the problem of the mechanical properties and energy evolution of damaged rocks under impact loads, the authors use static loads with different cyclic load thresholds to act on sandstone specimens to make them in distinct degrees of damage.
Then, the rock mechanics system (MTS-816) and the Split Hopkinson pressure bar (SHPB) are employed to perform uniaxial compression and impact dynamics tests on sandstones with different degrees of damage.
The results show that, from the perspective of mechanical properties, the uniaxial compressive strength and dynamic compressive strength of the damaged sandstone gradually decrease with the increase of the upper limit of the cycle threshold and both obey the growth law of the quadratic function, and the dynamic strength increase factor (DIF) also decreases with the increase of the cyclic load threshold.
In terms of energy, with the increment of the cyclic load threshold, the number of cracks in the damaged sandstone is large and the scale is enormous.
Due to the effect of cracks, when the incident energy is a fixed value, the transmission energy decreases with the increase of the damage degree and the change law of the reflection energy is the opposite.
The systematic study of the dynamic mechanical properties and energy evolution law of the damaged sandstone provides some reference for the prevention and mechanism research of rock bursts.
American Psychological Association (APA)
Zheng, Qiangqiang& Hu, Hao& Yuan, Anying& Li, Mengyao& Wang, Haibo& Wang, Mengxiang…[et al.]. 2020. Impact Dynamic Properties and Energy Evolution of Damaged Sandstone Based on Cyclic Loading Threshold. Shock and Vibration،Vol. 2020, no. 2020, pp.1-12.
https://search.emarefa.net/detail/BIM-1210162
Modern Language Association (MLA)
Zheng, Qiangqiang…[et al.]. Impact Dynamic Properties and Energy Evolution of Damaged Sandstone Based on Cyclic Loading Threshold. Shock and Vibration No. 2020 (2020), pp.1-12.
https://search.emarefa.net/detail/BIM-1210162
American Medical Association (AMA)
Zheng, Qiangqiang& Hu, Hao& Yuan, Anying& Li, Mengyao& Wang, Haibo& Wang, Mengxiang…[et al.]. Impact Dynamic Properties and Energy Evolution of Damaged Sandstone Based on Cyclic Loading Threshold. Shock and Vibration. 2020. Vol. 2020, no. 2020, pp.1-12.
https://search.emarefa.net/detail/BIM-1210162
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1210162