Feasibility study on the influence of discontinuities on anisotropic rock masses regarding the stiffness

Andreas Anjan Buyer, Lukas Gottsbacher, Wulf Schubert

Publikation: Beitrag in Buch/Bericht/KonferenzbandBeitrag in einem KonferenzbandForschungBegutachtung

Abstract

For the design of rock engineering projects, rock mass parameters are usually determined by the use of classification systems (Q, GSI, RMR, etc.). A homogeneous rock mass with reduced parameters via empirical relationships is generated, and the influence of the anisotropy is lost during the process. The influence of discrete discontinuities on the global rock mass stiffness is investigated in this feasibility study and the results compared to empirical solutions based on the GSI. The results show that with one joint set oriented perpendicular to the direction of loading, the block volume is rather insignificant for the resulting E rm ; whereas the joint normal spacing parallel to the direction of loading and the block shape are the most influencing factors. In the cases, with the block volume and joint condition as input parameters, the E rm is significantly underestimated, while the E rm , based on RQD and JCond 89 still fits in the range of the numerical results. However, the numerical investigations are so far limited on an orthogonal oriented joint network under uniaxial compression and further investigations are necessary.

Originalspracheenglisch
TitelGeomechanics and Geodynamics of Rock Masses
Redakteure/-innenVladimir Litvinenko
ErscheinungsortSt. Petersburg
Herausgeber (Verlag)CRC Press/Balkema
Seiten227-234
Seitenumfang8
Band1
ISBN (Print)9781138616455
PublikationsstatusVeröffentlicht - 22 Mai 2018
VeranstaltungInternational European Rock Mechanics Symposium, EUROCK 2018 - Saint Petersburg, Russland
Dauer: 22 Mai 201826 Mai 2018

Konferenz

KonferenzInternational European Rock Mechanics Symposium, EUROCK 2018
LandRussland
OrtSaint Petersburg
Zeitraum22/05/1826/05/18

Fingerprint

feasibility study
stiffness
discontinuity
Rocks
Stiffness
rock
spacing
Anisotropy
anisotropy
compression
engineering
parameter
Direction compound

Schlagwörter

    ASJC Scopus subject areas

    • !!Geochemistry and Petrology

    Dies zitieren

    Buyer, A. A., Gottsbacher, L., & Schubert, W. (2018). Feasibility study on the influence of discontinuities on anisotropic rock masses regarding the stiffness. in V. Litvinenko (Hrsg.), Geomechanics and Geodynamics of Rock Masses (Band 1, S. 227-234). St. Petersburg: CRC Press/Balkema.

    Feasibility study on the influence of discontinuities on anisotropic rock masses regarding the stiffness. / Buyer, Andreas Anjan; Gottsbacher, Lukas; Schubert, Wulf.

    Geomechanics and Geodynamics of Rock Masses. Hrsg. / Vladimir Litvinenko. Band 1 St. Petersburg : CRC Press/Balkema, 2018. S. 227-234.

    Publikation: Beitrag in Buch/Bericht/KonferenzbandBeitrag in einem KonferenzbandForschungBegutachtung

    Buyer, AA, Gottsbacher, L & Schubert, W 2018, Feasibility study on the influence of discontinuities on anisotropic rock masses regarding the stiffness. in V Litvinenko (Hrsg.), Geomechanics and Geodynamics of Rock Masses. Bd. 1, CRC Press/Balkema, St. Petersburg, S. 227-234, Saint Petersburg, Russland, 22/05/18.
    Buyer AA, Gottsbacher L, Schubert W. Feasibility study on the influence of discontinuities on anisotropic rock masses regarding the stiffness. in Litvinenko V, Hrsg., Geomechanics and Geodynamics of Rock Masses. Band 1. St. Petersburg: CRC Press/Balkema. 2018. S. 227-234
    Buyer, Andreas Anjan ; Gottsbacher, Lukas ; Schubert, Wulf. / Feasibility study on the influence of discontinuities on anisotropic rock masses regarding the stiffness. Geomechanics and Geodynamics of Rock Masses. Hrsg. / Vladimir Litvinenko. Band 1 St. Petersburg : CRC Press/Balkema, 2018. S. 227-234
    @inproceedings{f4eda53129c64c54b3837c503f19a1aa,
    title = "Feasibility study on the influence of discontinuities on anisotropic rock masses regarding the stiffness",
    abstract = "For the design of rock engineering projects, rock mass parameters are usually determined by the use of classification systems (Q, GSI, RMR, etc.). A homogeneous rock mass with reduced parameters via empirical relationships is generated, and the influence of the anisotropy is lost during the process. The influence of discrete discontinuities on the global rock mass stiffness is investigated in this feasibility study and the results compared to empirical solutions based on the GSI. The results show that with one joint set oriented perpendicular to the direction of loading, the block volume is rather insignificant for the resulting E rm ; whereas the joint normal spacing parallel to the direction of loading and the block shape are the most influencing factors. In the cases, with the block volume and joint condition as input parameters, the E rm is significantly underestimated, while the E rm , based on RQD and JCond 89 still fits in the range of the numerical results. However, the numerical investigations are so far limited on an orthogonal oriented joint network under uniaxial compression and further investigations are necessary.",
    keywords = "3DEC, Block volume, Jointed rock mass, Young’s modulus",
    author = "Buyer, {Andreas Anjan} and Lukas Gottsbacher and Wulf Schubert",
    year = "2018",
    month = "5",
    day = "22",
    language = "English",
    isbn = "9781138616455",
    volume = "1",
    pages = "227--234",
    editor = "Vladimir Litvinenko",
    booktitle = "Geomechanics and Geodynamics of Rock Masses",
    publisher = "CRC Press/Balkema",
    address = "Netherlands",

    }

    TY - GEN

    T1 - Feasibility study on the influence of discontinuities on anisotropic rock masses regarding the stiffness

    AU - Buyer, Andreas Anjan

    AU - Gottsbacher, Lukas

    AU - Schubert, Wulf

    PY - 2018/5/22

    Y1 - 2018/5/22

    N2 - For the design of rock engineering projects, rock mass parameters are usually determined by the use of classification systems (Q, GSI, RMR, etc.). A homogeneous rock mass with reduced parameters via empirical relationships is generated, and the influence of the anisotropy is lost during the process. The influence of discrete discontinuities on the global rock mass stiffness is investigated in this feasibility study and the results compared to empirical solutions based on the GSI. The results show that with one joint set oriented perpendicular to the direction of loading, the block volume is rather insignificant for the resulting E rm ; whereas the joint normal spacing parallel to the direction of loading and the block shape are the most influencing factors. In the cases, with the block volume and joint condition as input parameters, the E rm is significantly underestimated, while the E rm , based on RQD and JCond 89 still fits in the range of the numerical results. However, the numerical investigations are so far limited on an orthogonal oriented joint network under uniaxial compression and further investigations are necessary.

    AB - For the design of rock engineering projects, rock mass parameters are usually determined by the use of classification systems (Q, GSI, RMR, etc.). A homogeneous rock mass with reduced parameters via empirical relationships is generated, and the influence of the anisotropy is lost during the process. The influence of discrete discontinuities on the global rock mass stiffness is investigated in this feasibility study and the results compared to empirical solutions based on the GSI. The results show that with one joint set oriented perpendicular to the direction of loading, the block volume is rather insignificant for the resulting E rm ; whereas the joint normal spacing parallel to the direction of loading and the block shape are the most influencing factors. In the cases, with the block volume and joint condition as input parameters, the E rm is significantly underestimated, while the E rm , based on RQD and JCond 89 still fits in the range of the numerical results. However, the numerical investigations are so far limited on an orthogonal oriented joint network under uniaxial compression and further investigations are necessary.

    KW - 3DEC

    KW - Block volume

    KW - Jointed rock mass

    KW - Young’s modulus

    UR - http://www.scopus.com/inward/record.url?scp=85061368348&partnerID=8YFLogxK

    M3 - Conference contribution

    SN - 9781138616455

    VL - 1

    SP - 227

    EP - 234

    BT - Geomechanics and Geodynamics of Rock Masses

    A2 - Litvinenko, Vladimir

    PB - CRC Press/Balkema

    CY - St. Petersburg

    ER -