- Tytuł:
- Studying the effect of some parameters on the stability of shallow tunnels
- Autorzy:
-
Abdellah, W. R.
Ali, M. A.
Yang, H.-S. - Powiązania:
- https://bibliotekanauki.pl/articles/92102.pdf
- Data publikacji:
- 2018
- Wydawca:
- Główny Instytut Górnictwa
- Tematy:
-
tunnel shape
rock joint
numerical modelling
stability indicator
kształt tunelu
przełom skał
modelowanie numeryczne
wskaźnik stabilności - Opis:
- 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.
- Źródło:
-
Journal of Sustainable Mining; 2018, 17, 1; 20-33
2300-1364
2300-3960 - Pojawia się w:
- Journal of Sustainable Mining
- Dostawca treści:
- Biblioteka Nauki
Artykuł