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    Closed-Form Solution to the Poromechanics of Deep Arbitrary-Shaped Openings Subjected to Rock Mass Alteration

    Source: International Journal of Geomechanics:;2020:;Volume ( 020 ):;issue: 012
    Author:
    Xiangjian Dong
    ,
    Ali Karrech
    ,
    Hakan Basarir
    ,
    Mohamed Elchalakani
    ,
    Chongchong Qi
    DOI: 10.1061/(ASCE)GM.1943-5622.0001875
    Publisher: ASCE
    Abstract: The aim of this paper is to propose a closed-form solution to the poromechanics problem of stress and pore pressure distribution around noncircular openings at great depth subjected to hydrostatic water pressure and far-field geostresses. The problem is solved by superposing the effects of fluid and solid skeleton obtained over simple circular geometries and generalizing the obtained expression to various geometries of mined ore bodies using complex variable functions and conformal mapping techniques. The principal stresses obtained analytically over the opening boundary and within the domain are compared with the results of finite-element analysis to verify the proposed approach. The comparison conducted for a representative noncircular opening indicates good agreement between the analytical and numerical methods. Hence, a parametric study is used to investigate in detail the stress variation under different opening dimensions, heterogeneous initial total stress conditions, and far-field pore pressure values. The proposed solution could be instrumental in the design of underground openings and deep mass alterations (that include local anthropogenic damage zones). It could also be used to provide reinforcement solutions where stresses can reach the mechanical stability thresholds.
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      Closed-Form Solution to the Poromechanics of Deep Arbitrary-Shaped Openings Subjected to Rock Mass Alteration

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    http://yetl.yabesh.ir/yetl1/handle/yetl/4268865
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    contributor authorXiangjian Dong
    contributor authorAli Karrech
    contributor authorHakan Basarir
    contributor authorMohamed Elchalakani
    contributor authorChongchong Qi
    date accessioned2022-01-30T21:48:13Z
    date available2022-01-30T21:48:13Z
    date issued12/1/2020 12:00:00 AM
    identifier other%28ASCE%29GM.1943-5622.0001875.pdf
    identifier urihttp://yetl.yabesh.ir/yetl1/handle/yetl/4268865
    description abstractThe aim of this paper is to propose a closed-form solution to the poromechanics problem of stress and pore pressure distribution around noncircular openings at great depth subjected to hydrostatic water pressure and far-field geostresses. The problem is solved by superposing the effects of fluid and solid skeleton obtained over simple circular geometries and generalizing the obtained expression to various geometries of mined ore bodies using complex variable functions and conformal mapping techniques. The principal stresses obtained analytically over the opening boundary and within the domain are compared with the results of finite-element analysis to verify the proposed approach. The comparison conducted for a representative noncircular opening indicates good agreement between the analytical and numerical methods. Hence, a parametric study is used to investigate in detail the stress variation under different opening dimensions, heterogeneous initial total stress conditions, and far-field pore pressure values. The proposed solution could be instrumental in the design of underground openings and deep mass alterations (that include local anthropogenic damage zones). It could also be used to provide reinforcement solutions where stresses can reach the mechanical stability thresholds.
    publisherASCE
    titleClosed-Form Solution to the Poromechanics of Deep Arbitrary-Shaped Openings Subjected to Rock Mass Alteration
    typeJournal Paper
    journal volume20
    journal issue12
    journal titleInternational Journal of Geomechanics
    identifier doi10.1061/(ASCE)GM.1943-5622.0001875
    page15
    treeInternational Journal of Geomechanics:;2020:;Volume ( 020 ):;issue: 012
    contenttypeFulltext
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    DSpace software copyright © 2002-2015  DuraSpace
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