Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Numerical investigation of arching mechanism to underground excavation in jointed rock mass
Graphical abstract Display Omitted
Highlights Discover the arch stabilization mechanism of the rock structures after excavation. Numerical simulation using the discontinuous deformation analysis (DDA). Different in-situ stress ratio, joint friction angle, overburden and dip angle. The formation of pressure arch and the stabilization mechanism of rock bolts.
Abstract In this paper, the discontinuous deformation analysis (DDA) is applied to numerically investigate the formation of pressure arch and the stabilization mechanism of rock bolts for underground excavation in laminated rock mass. A global pressure arch with elevated stress is observed sustaining the weight of the overburden and providing the natural shield over the opening. Below the pressure arch is a loosened zone, where a group of local voussoir beam arches are formed to transfer the weight of each layer to the abutments. Detailed parametric studies regarding the in-situ stress ratio, joint friction angle, overburden depth and dip angle of strata are conducted and their influences on the formation of global pressure arch and local voussoir beam arches are identified and discussed. Based on the observed phenomena, the corresponding reinforcement scheme is proposed and the effectiveness and stabilization mechanism are examined.
Numerical investigation of arching mechanism to underground excavation in jointed rock mass
Graphical abstract Display Omitted
Highlights Discover the arch stabilization mechanism of the rock structures after excavation. Numerical simulation using the discontinuous deformation analysis (DDA). Different in-situ stress ratio, joint friction angle, overburden and dip angle. The formation of pressure arch and the stabilization mechanism of rock bolts.
Abstract In this paper, the discontinuous deformation analysis (DDA) is applied to numerically investigate the formation of pressure arch and the stabilization mechanism of rock bolts for underground excavation in laminated rock mass. A global pressure arch with elevated stress is observed sustaining the weight of the overburden and providing the natural shield over the opening. Below the pressure arch is a loosened zone, where a group of local voussoir beam arches are formed to transfer the weight of each layer to the abutments. Detailed parametric studies regarding the in-situ stress ratio, joint friction angle, overburden depth and dip angle of strata are conducted and their influences on the formation of global pressure arch and local voussoir beam arches are identified and discussed. Based on the observed phenomena, the corresponding reinforcement scheme is proposed and the effectiveness and stabilization mechanism are examined.
Numerical investigation of arching mechanism to underground excavation in jointed rock mass
He, L. (Autor:in) / Zhang, Q.B. (Autor:in)
Tunnelling and Underground Space Technology ; 50 ; 54-67
22.06.2015
14 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
Numerical investigation of arching mechanism to underground excavation in jointed rock mass
| British Library Online Contents | 2015
Numerical investigation of arching mechanism to underground excavation in jointed rock mass
| Online Contents | 2015
Numerical investigation of arching mechanism to underground excavation in jointed rock mass
| British Library Online Contents | 2015
Excavation problems of an underground water reservoir in a jointed rock mass
| British Library Conference Proceedings | 1994
| British Library Conference Proceedings | 1995