Micro-textural controlled variations of the geomechanical properties of andesites

F. Amann; N. Aysal; M. Plötze

doi:10.1201/b15683-60

Micro-textural controlled variations of the geomechanical properties of andesites

Ündül, F. Amann, N. Aysal, M. Plötze

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

7 Citations (Scopus)

Abstract

Micro-textural variations are essential for understanding variation in strength and failure behavior of rock material. Therefore the effects of petrography and mineralogy on geomechanical properties have been widely investigated. In this study andesitic rock samples with different micro-textural characteristics from three different locations inTurkey were selected. Unconfined compressive strength tests revealed substantial variations in Unconfined Compressive Strength (UCS) and the micro-crack initiation (σ_CI) threshold. Detailed petro-physical, petrographic and mineralogical analysis (XRD) were used to understand these strength variations. The synthesis of strength, petrographic, micro-structural and mineralogical data suggest, that both, the peak strength and crack initiation threshold are strongly influenced by the distribution of plagioclase, amphibole and biotite phenocrystals, and the mineral composition of the fine-grained matrix.

Original language	English
Title of host publication	ISRM International Symposium - EUROCK 2013
Editors	Kwasniewski, Lydzba
Publisher	International Society for Rock Mechanics
Pages	357-361
Number of pages	5
ISBN (Print)	9781138000803
DOIs	https://doi.org/10.1201/b15683-60
Publication status	Published - 2013
Externally published	Yes
Event	ISRM International Symposium - EUROCK 2013 - Wroclaw, Poland Duration: 23 Oct 2013 → 26 Oct 2013

Publication series

Name	ISRM International Symposium - EUROCK 2013

Conference

Conference	ISRM International Symposium - EUROCK 2013
Country/Territory	Poland
City	Wroclaw
Period	23/10/13 → 26/10/13

Bibliographical note

Publisher Copyright:
© 2013 Taylor & Francis Group, London.

Access to Document

10.1201/b15683-60

Cite this

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title = "Micro-textural controlled variations of the geomechanical properties of andesites",

abstract = "Micro-textural variations are essential for understanding variation in strength and failure behavior of rock material. Therefore the effects of petrography and mineralogy on geomechanical properties have been widely investigated. In this study andesitic rock samples with different micro-textural characteristics from three different locations inTurkey were selected. Unconfined compressive strength tests revealed substantial variations in Unconfined Compressive Strength (UCS) and the micro-crack initiation (σCI) threshold. Detailed petro-physical, petrographic and mineralogical analysis (XRD) were used to understand these strength variations. The synthesis of strength, petrographic, micro-structural and mineralogical data suggest, that both, the peak strength and crack initiation threshold are strongly influenced by the distribution of plagioclase, amphibole and biotite phenocrystals, and the mineral composition of the fine-grained matrix.",

author = "{\"U}nd{\"u}l and F. Amann and N. Aysal and M. Pl{\"o}tze",

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doi = "10.1201/b15683-60",

language = "English",

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series = "ISRM International Symposium - EUROCK 2013",

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Ündül, Amann, F, Aysal, N & Plötze, M 2013, Micro-textural controlled variations of the geomechanical properties of andesites. in Kwasniewski & Lydzba (eds), ISRM International Symposium - EUROCK 2013. ISRM International Symposium - EUROCK 2013, International Society for Rock Mechanics, pp. 357-361, ISRM International Symposium - EUROCK 2013, Wroclaw, Poland, 23/10/13. https://doi.org/10.1201/b15683-60

Micro-textural controlled variations of the geomechanical properties of andesites. / Ündül; Amann, F.; Aysal, N. et al.
ISRM International Symposium - EUROCK 2013. ed. / Kwasniewski; Lydzba. International Society for Rock Mechanics, 2013. p. 357-361 (ISRM International Symposium - EUROCK 2013).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

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T1 - Micro-textural controlled variations of the geomechanical properties of andesites

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AU - Aysal, N.

AU - Plötze, M.

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N2 - Micro-textural variations are essential for understanding variation in strength and failure behavior of rock material. Therefore the effects of petrography and mineralogy on geomechanical properties have been widely investigated. In this study andesitic rock samples with different micro-textural characteristics from three different locations inTurkey were selected. Unconfined compressive strength tests revealed substantial variations in Unconfined Compressive Strength (UCS) and the micro-crack initiation (σCI) threshold. Detailed petro-physical, petrographic and mineralogical analysis (XRD) were used to understand these strength variations. The synthesis of strength, petrographic, micro-structural and mineralogical data suggest, that both, the peak strength and crack initiation threshold are strongly influenced by the distribution of plagioclase, amphibole and biotite phenocrystals, and the mineral composition of the fine-grained matrix.

AB - Micro-textural variations are essential for understanding variation in strength and failure behavior of rock material. Therefore the effects of petrography and mineralogy on geomechanical properties have been widely investigated. In this study andesitic rock samples with different micro-textural characteristics from three different locations inTurkey were selected. Unconfined compressive strength tests revealed substantial variations in Unconfined Compressive Strength (UCS) and the micro-crack initiation (σCI) threshold. Detailed petro-physical, petrographic and mineralogical analysis (XRD) were used to understand these strength variations. The synthesis of strength, petrographic, micro-structural and mineralogical data suggest, that both, the peak strength and crack initiation threshold are strongly influenced by the distribution of plagioclase, amphibole and biotite phenocrystals, and the mineral composition of the fine-grained matrix.

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Micro-textural controlled variations of the geomechanical properties of andesites

Abstract

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