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Damage Evolution of Rock Salt Under Multilevel Amplitude Creep–fatigue Loading with Acoustic Emission Monitoring by Zongze Li; Jinjie Suo; Jinyang Fan; Marion Fourmeau; Deyi Jiang; Daniel Nelias is a Engineering article available to read on EtoBox.

What is Damage Evolution of Rock Salt Under Multilevel Amplitude Creep–fatigue Loading with Acoustic Emission Monitoring about?

The use of salt caverns to construct the compressed air energy storage (CAES) plants is an important development for the reuse of abandoned mines in response to the Chinese national green mining strategy and is a significant means to accomplish global carbon neutrality. The study of the mechanical behavior of rock salts is the base for ensuring its stability. Power plant operating conditions consist of periodic gas injection and abstraction, resulting in the cyclical mechanical loading of salt cavern walls. To study the mechanical properties of the rock surrounding a salt cavern storage reservoir under representative conditions, uniaxial and triaxial graded creep–fatigue tests on rock salt were designed, and their mechanical and acoustic emission characteristics were analyzed considering the factual operating gas pressure of the CAES plant. The results show that the residual strain produced by the cycle before the high-stress plateau are larger than that produced by the cycle after the high-stress plateau, and this difference may be associated with the hardening effect during creep. The change in acoustic emission parameters can reflect the different fracture patterns of rock salt

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Author

Zongze Li; Jinjie Suo; Jinyang Fan; Marion Fourmeau; Deyi Jiang; Daniel Nelias

Publisher

Elsevier BV

Published

2023

Language

EN

Field

Engineering (Physical Sciences)