Studying the effect of some parameters on the stability of shallow tunnels

Abdellah, W. R.; Ali, M. A.; Yang, H.-S.

doi:10.1016/j.jsm.2018.02.001

Artykuł - szczegóły

Tytuł artykułu

Studying the effect of some parameters on the stability of shallow tunnels

Autorzy

Abdellah W. R. , Ali M. A. , Yang H.-S.

Treść / Zawartość

Pełne teksty:

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Identyfikatory

DOI

10.1016/j.jsm.2018.02.001

Warianty tytułu

Języki publikacji

Abstrakty

Several factors have crucial impact on the serviceability of underground openings including: the quality of rock mass; the presence of rock joints and their geometrical properties; the state of in-situ stress ratio; the depth below surface and opening geometry. This paper only investigates the effect of two parameters on the stability of underground shallow tunnels, namely: the presence of rock joints in the rock mass matrix and the shape of the excavation. A series of two-dimensional elasto-plastic finite-element models has been constructed using rock-soil, RS2D, software. Consequently, parametric stability analysis has been conducted for three different tunnel shapes (e.g. circular, square and horseshoe) with/without joint inclusion. Four reference points have been assigned in the tunnel perimeter (e.g. back, sidewalls and floor) to monitor the state of stress-displacement in the rock mass around them. The results indicate that the weak performance of a tunnel opening occurs with a square-shaped opening and when joints exist in the rock mass. In addition, the normal stress along joints sharply drops in the vicinity of a tunnel opening. Moreover, the direction of shear stress is reversed. Thus, it causes inward shear displacement.

Słowa kluczowe

tunnel shape rock joint numerical modelling stability indicator

kształt tunelu przełom skał modelowanie numeryczne wskaźnik stabilności

Wydawca

Elsevier
Główny Instytut Górnictwa

Czasopismo

Journal of Sustainable Mining

Rocznik

2018

Tom

Vol. 17, iss. 1

Strony

20--33

Opis fizyczny

Bibliogr. 30 poz.

Twórcy

autor

Abdellah W. R.

wre544@gmail.com

Mining and Metallurgical Engineering Dept., Faculty of Engineering, University of Assiut, Assiut, 71516, Egypt

autor

Ali M. A.

Mining and Petroleum Engineering Dept., Faculty of Engineering, University of Al-Azhar, Qena, Egypt

autor

Yang H.-S.

Energy and Resource Engineering Dept., College of Engineering, Chonnam National University, South Korea

Bibliografia

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Uwagi

Opracowanie w ramach umowy 509/P-DUN/2018 ze środków MNiSW przeznaczonych na działalność upowszechniającą naukę (2018)

Typ dokumentu

Bibliografia

Identyfikator YADDA

bwmeta1.element.baztech-4d162226-33a5-4dd3-ac88-179f9e8bb80f