ABSTRACT
This paper presents a parametric study of underground excavation works in the Joint Cavern Development project at the Anderson Road Quarry site in Hong Kong. The critical parameters governing the analysis results obtained from the Distinct Element Method (DEM) and Finite Element Method (FEM) are identified, compared and discussed. To provide a comprehensive representation of the jointed rock mass at the subject site, a Discrete Fracture Network (DFN) model has been developed based on extensive rock joint data, and incorporated into the numerical models. A parametric study by varying several key parameters has been performed, focusing on the impact on the stress distribution, deformation patterns and mobilised support forces. The findings of this study will provide valuable insights on the numerical analyses for rock support design, which offer guidance on the selection of appropriate modelling techniques and parameters based on site-specific conditions.
