Abstract: We carried out full-scale model test of applying shotcrete and anchors to strengthen surrounding rock blocks.According to research achievements in this regard and engineering practice at Huangdao water-sealed cavern,we demonstrated and revealed that the anchoring effect could increase the self bearing capacity and restrain the deformation of surrounding rock. We also discussed the key issues inclusive of the design,materials,construction and monitoring of the anchor-shotcrete support for large underground water-sealed cavern. Measures such as applying anchor with low prestress,steel-fiber reinforced shotcrete,shotcrete containing silicon powder,as well as overall control over seepage water could increase the long-term stability of water-sealed cavern and prevent the groundwater seepage.

Key words: underground water-sealed cavern, anchor-shotcrete support system;shotcrete, low-prestressed rockbolt