Tweet Share

• Send by email

  Send by email

  

  Rock Reinforcement Mechanisms in Horizontally Layered Jointed Rock: Reinforced Rock Unit, Beam Building and Suspension

  This paper aims to highlight the role of geological structure in rock support design for tunnelling. In particular, the rock reinforcement mechanisms of sub-horizontally layered rock were studied using the distinct element method. Different rock reinforcement mechanisms manifested depending on the bedding thickness. For thicker beddings, it was found that the axial forces in the rock bolts decayed with distance, with trends akin to reinforced rock units, as the rock layers exhibited a self supporting mechanism similar to voussoir beams. For thinner beddings, a beam building mechanism took place. On the other hand, a suspension mechanism manifested when the rock bolts were extended into the more rigid layers. A case history was modelled. The findings in this paper highlight the importance to ensure that the reinforcement support for wide-span underground excavations in horizontally layered jointed rock are tailored to the geological conditions being encountered.

  Recipient :

  Name ^* :

  E-mail address ^* :

  ^* Required fields

  Send   or  Cancel

• Print