Proceedings of the 9th China-Russia Symposium "Coal in the 21st Century: Mining, Intelligent Equipment and Environment Protection" (COAL 2018)

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Experimental Study on Mechanical Properties of Granite at Different Damage Degrees

Authors
Maotong Li, Chuanxiao Liu, Huaqing Yang, Yuanchao Zhou, Jiashu Liang
Corresponding Author
Maotong Li
Available Online October 2018.
DOI
10.2991/coal-18.2018.49How to use a DOI?
Keywords
rock mechanics, damage degree, granite, stress-strain curve, uniaxial compression, mechanical characteristics
Abstract

Rock mechanics servo testing machine was used to test the uniaxial compression of granites with different degrees of damage. Based on the experimental results of stress-strain curves, the influence of different damage degrees on the mechanical properties of granite was analyzed. The results show that compared with intact granites, with the increase of damage degree, the mechanical properties of granites are obviously decreased. Their peak strengths and peak strains were significantly reduced, and the decrease was closely related to the degree of damage. As the damage degree reached 0.743%, the peak strength of the rock samples decreased significantly, the decline amplitude gradually increased, and then the peak intensity decreased slowly. The greater the damage, the greater the damage effect, the peak strength of the granite is greatly reduced, and the peak strain of the rock sample is significantly reduced. When the damage degree is less than 0.513%, the peak strain is greatly reduced. When the damage degree is higher than 0.513%, the decrease in peak strain decreases gradually. As the degree of damage increases, the strength of the rock sample decreases, the initial crack closes in a shorter time and a new crack is immediately created, resulting in a gradual reduction in the strain at failure.

Copyright
© 2018, the Authors. Published by Atlantis Press.
Open Access
This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).

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Volume Title
Proceedings of the 9th China-Russia Symposium "Coal in the 21st Century: Mining, Intelligent Equipment and Environment Protection" (COAL 2018)
Series
Advances in Engineering Research
Publication Date
October 2018
ISBN
978-94-6252-570-2
ISSN
2352-5401
DOI
10.2991/coal-18.2018.49How to use a DOI?
Copyright
© 2018, the Authors. Published by Atlantis Press.
Open Access
This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).

Cite this article

risenwbib
TY  - CONF
AU  - Maotong Li
AU  - Chuanxiao Liu
AU  - Huaqing Yang
AU  - Yuanchao Zhou
AU  - Jiashu Liang
PY  - 2018/10
DA  - 2018/10
TI  - Experimental Study on Mechanical Properties of Granite at Different Damage Degrees
BT  - Proceedings of the 9th China-Russia Symposium "Coal in the 21st Century: Mining, Intelligent Equipment and Environment Protection" (COAL 2018)
PB  - Atlantis Press
SP  - 270
EP  - 273
SN  - 2352-5401
UR  - https://doi.org/10.2991/coal-18.2018.49
DO  - 10.2991/coal-18.2018.49
ID  - Li2018/10
ER  -