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Development of Improved Rock Bolt for Reinforcement of Fracture Zone in Slope and Tunnel  

Kim, Soo-Lo (Institute of Mine Reclamation Technology, Mine Reclamation Corporation)
Kim, Jong-Tae (Dept. of Earth and Environmental Sciences, Andong National University)
Park, Seong-Cheol (Dept. of Earth and Environmental Sciences, Andong National University)
Kim, Tae-Heok (Institute of Mine Reclamation Technology, Mine Reclamation Corporation)
Kwon, Hyun-Ho (Institute of Mine Reclamation Technology, Mine Reclamation Corporation)
Jeong, Gyo-Cheol (Dept. of Earth and Environmental Sciences, Andong National University)
Publication Information
The Journal of Engineering Geology / v.20, no.1, 2010 , pp. 101-109 More about this Journal
Abstract
There are many slopes generally developed by excavation and cut slope with small steps on massive slopes of roads. Especially these cut slopes which excavating around fault fracture zone need a reinforcement technology in order to ensure safety. In the case of slope excavation, it is difficult to use the existing slope support at fracture zone because of geological characteristics. Especially the factor of safety decreases significantly due to the movement of blocks in bed rocks and the expansion of interspace of discontinuous planes in fractured zones caused by excavation. Thus an efficient reinforcement technique in accordance with geological properties of fracture zones needs to be developed because the existing slope support has a restricted application. Therefore it is necessary to develop the specialized rock bolt technique in order to ensure an efficient factor of safety for anomalous fracture zones in slopes and tunnels. The purpose of this study is to develop newly improved rock bolt to increase a supporting effect of the swellex bolt method used recently as a friction type in fracture zones.
Keywords
slope; tunnel; fracture zone; improved rock bolt; swellex bolt;
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