Temperature Induced Fracturing of Rock Salt Mass

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dc.identifier.uri http://dx.doi.org/10.15488/1800
dc.identifier.uri http://www.repo.uni-hannover.de/handle/123456789/1825
dc.contributor.author Staudtmeister, Kurt
dc.contributor.author Zapf, Dirk
dc.contributor.author Leuger, Bastian
dc.contributor.author Elend, Marc
dc.date.accessioned 2017-08-30T11:46:22Z
dc.date.available 2017-08-30T11:46:22Z
dc.date.issued 2017
dc.identifier.citation Staudtmeister, K.; Zapf, D.; Leuger, B.; Elend, M.: Temperature Induced Fracturing of Rock Salt Mass. In: Procedia Engineering 191 (2017), S. 967-974. DOI: https://doi.org/10.1016/j.proeng.2017.05.268
dc.description.abstract During the operation of gas storage caverns in rock salt mass the internal pressure changes during filling and withdrawal phases. Additionally temperature variations occur versus operation time. During withdrawal phases the temperature decreases which can lead to stress states in tensile regions at the cavern wall. Because the tensile strength of rock salt is relatively low compared to its compressive strength it is likely that tensile stresses lead to discrete fractures orthogonal to the direction of the tensile stresses. If fractures of this kind are created – whether vertical or horizontal – the gas will penetrate into the fracture at the relevant pressure and further extend the length of the fractures under certain circumstances. There are currently no theoretical approaches describing the manner in which the fractures might propagate into the not by temperature changes influenced rock salt mass during repeated cyclic pressure changes. This aspect is topic of prospective research. Salt caverns cannot be entered but only explored by sonar measurements, with which it is not possible to detect tensile fractures at the cavern wall. Within this paper examples from mining configurations will be shown where temperature changes lead to tensile fractures in the surrounding rock salt. These fractures have been well mapped while the temperature development is well documented. The paper deals with recalculations under consideration of different salt properties of the temperature distributions and the resulting stress state in the surrounding rock salt mass. The stress calculation results and the consequences for the dimensioning of natural gas caverns are going to be discussed and assessed. eng
dc.language.iso eng
dc.publisher London : Elsevier Ltd.
dc.relation.ispartofseries Procedia Engineering 191 (2017)
dc.rights CC BY-NC-ND 4.0 Unported
dc.rights.uri https://creativecommons.org/licenses/by-nc-nd/4.0/
dc.subject Caves eng
dc.subject Compressive strength eng
dc.subject Fracture eng
dc.subject Rock mechanics eng
dc.subject Salt deposits eng
dc.subject Temperature distribution eng
dc.subject Tensile strength eng
dc.subject Tensile stress eng
dc.subject Underground gas storage eng
dc.subject Fracture propagation eng
dc.subject Gas storage eng
dc.subject Rock salt eng
dc.subject Temperature decrease eng
dc.subject Temperature development eng
dc.subject Temperature variation eng
dc.subject Temperature-induced eng
dc.subject Theoretical approach eng
dc.subject Rocks eng
dc.subject fracture propagation eng
dc.subject gas storage eng
dc.subject Rock mechanics eng
dc.subject rock salt eng
dc.subject.ddc 600 | Technik ger
dc.title Temperature Induced Fracturing of Rock Salt Mass eng
dc.type article
dc.type Text
dc.relation.issn 1877-7058
dc.relation.doi https://doi.org/10.1016/j.proeng.2017.05.268
dc.bibliographicCitation.volume 191
dc.bibliographicCitation.firstPage 967
dc.bibliographicCitation.lastPage 974
dc.description.version publishedVersion
tib.accessRights frei zug�nglich

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