Dynamic mechanical response of solid at high strain rate after hydrochemical corrosion

DOI

10.2991/978-94-6463-316-0_26How to use a DOI?

Keywords

hydrochemical corrosion; dynamic mechanical strength; rock dynamics; conversion regularity

Abstract

The underground rock mass, especially the surrounding rock of the offshore orebody, has been in the groundwater environment for a long time, and the hydrochemical corrosion has become an important factor affecting the mechanical strength of the surrounding rock. At the same time, the underground environment of “three heights and one disturbance” in the deep rock mass brings the influence of dynamic load to the surrounding rock. Therefore, it is of great significance to study the influence of hydrochemical corrosion on dynamic mechanical properties of rock to ensure the stability of surrounding rock. This paper takes granite mined from a large mine as the research object and uses the Hopkinson impact system to conduct dynamic mechanical tests on rock samples corroded by salt solutions of different concentrations plus solids. The stress-strain curve, failure form and energy evolution process of test samples are analyzed one by one. The results show that with the increase of the mass concentration of the salt solution, the impact failure strain of the specimen shows a trend of “rapidly decreasing → rapidly increasing → stable fluctuation”. In addition, most of the energy entering the specimen is absorbed by the specimen for the work done by the crushing of the cement paste block and the surface energy consumed by the formation of the diameter crack of the rock block, and only a small part of the energy is transferred to the transmission rod in the form of transmission energy. As the mass concentration increases, the absorption energy consumption of the specimen decreases first and then increases, and the minimum value (about 22.32%) is obtained when the mass concentration is 10%. The conclusion can provide a theoretical basis for the dynamic impact of the offshore ore body after corrosion, which has been exposed to groundwater corrosion for a long time, and has important research significance.

Copyright

© 2023 The Author(s)

Open Access

Open Access This chapter is licensed under the terms of the Creative Commons Attribution-NonCommercial 4.0 International License (http://creativecommons.org/licenses/by-nc/4.0/), which permits any noncommercial use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license and indicate if changes were made.

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TY  - CONF
AU  - Ming Zhou
AU  - Lan Qiao
AU  - Qingwen Li
PY  - 2023
DA  - 2023/12/14
TI  - Dynamic mechanical response of solid at high strain rate after hydrochemical corrosion
BT  - Proceedings of the 2023 5th International Conference on Civil Engineering, Environment Resources and Energy Materials (CCESEM 2023)
PB  - Atlantis Press
SP  - 248
EP  - 260
SN  - 2352-5401
UR  - https://doi.org/10.2991/978-94-6463-316-0_26
DO  - 10.2991/978-94-6463-316-0_26
ID  - Zhou2023
ER  -