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Self-Healing Characteristics of Damaged Rock Salt under Different Healing Conditions

Salt deposits are commonly regarded as ideal hosts for geologic energy reservoirs. Underground cavern construction-induced damage in salt is reduced by self-healing. Thus, studying the influencing factors on such healing processes is important. This research uses ultrasonic technology to monitor the...

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Detalles Bibliográficos
Autores principales: Chen, Jie, Ren, Song, Yang, Chunhe, Jiang, Deyi, Li, Lin
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2013
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5521314/
https://www.ncbi.nlm.nih.gov/pubmed/28811444
http://dx.doi.org/10.3390/ma6083438
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author Chen, Jie
Ren, Song
Yang, Chunhe
Jiang, Deyi
Li, Lin
author_facet Chen, Jie
Ren, Song
Yang, Chunhe
Jiang, Deyi
Li, Lin
author_sort Chen, Jie
collection PubMed
description Salt deposits are commonly regarded as ideal hosts for geologic energy reservoirs. Underground cavern construction-induced damage in salt is reduced by self-healing. Thus, studying the influencing factors on such healing processes is important. This research uses ultrasonic technology to monitor the longitudinal wave velocity variations of stress-damaged rock salts during self-recovery experiments under different recovery conditions. The influences of stress-induced initial damage, temperature, humidity, and oil on the self-recovery of damaged rock salts are analyzed. The wave velocity values of the damaged rock salts increase rapidly during the first 200 h of recovery, and the values gradually increase toward stabilization after 600 h. The recovery of damaged rock salts is subjected to higher initial damage stress. Water is important in damage recovery. The increase in temperature improves damage recovery when water is abundant, but hinders recovery when water evaporates. The presence of residual hydraulic oil blocks the inter-granular role of water and restrains the recovery under triaxial compression. The results indicate that rock salt damage recovery is related to the damage degree, pore pressure, temperature, humidity, and presence of oil due to the sealing integrity of the jacket material.
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spelling pubmed-55213142017-07-28 Self-Healing Characteristics of Damaged Rock Salt under Different Healing Conditions Chen, Jie Ren, Song Yang, Chunhe Jiang, Deyi Li, Lin Materials (Basel) Article Salt deposits are commonly regarded as ideal hosts for geologic energy reservoirs. Underground cavern construction-induced damage in salt is reduced by self-healing. Thus, studying the influencing factors on such healing processes is important. This research uses ultrasonic technology to monitor the longitudinal wave velocity variations of stress-damaged rock salts during self-recovery experiments under different recovery conditions. The influences of stress-induced initial damage, temperature, humidity, and oil on the self-recovery of damaged rock salts are analyzed. The wave velocity values of the damaged rock salts increase rapidly during the first 200 h of recovery, and the values gradually increase toward stabilization after 600 h. The recovery of damaged rock salts is subjected to higher initial damage stress. Water is important in damage recovery. The increase in temperature improves damage recovery when water is abundant, but hinders recovery when water evaporates. The presence of residual hydraulic oil blocks the inter-granular role of water and restrains the recovery under triaxial compression. The results indicate that rock salt damage recovery is related to the damage degree, pore pressure, temperature, humidity, and presence of oil due to the sealing integrity of the jacket material. MDPI 2013-08-12 /pmc/articles/PMC5521314/ /pubmed/28811444 http://dx.doi.org/10.3390/ma6083438 Text en © 2013 by the authors; licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution license (http://creativecommons.org/licenses/by/3.0/).
spellingShingle Article
Chen, Jie
Ren, Song
Yang, Chunhe
Jiang, Deyi
Li, Lin
Self-Healing Characteristics of Damaged Rock Salt under Different Healing Conditions
title Self-Healing Characteristics of Damaged Rock Salt under Different Healing Conditions
title_full Self-Healing Characteristics of Damaged Rock Salt under Different Healing Conditions
title_fullStr Self-Healing Characteristics of Damaged Rock Salt under Different Healing Conditions
title_full_unstemmed Self-Healing Characteristics of Damaged Rock Salt under Different Healing Conditions
title_short Self-Healing Characteristics of Damaged Rock Salt under Different Healing Conditions
title_sort self-healing characteristics of damaged rock salt under different healing conditions
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5521314/
https://www.ncbi.nlm.nih.gov/pubmed/28811444
http://dx.doi.org/10.3390/ma6083438
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