Rapid Installation of Rock Bolt in Rocks Using Dynamic Expansion Materials
Rock bolts are essential supports in NATM tunnels and underground mines.A conventional mechanical rock holt is usually a passive support that is activated by rock mass movement, and then stress equilibrium is achieved passively.The expanding type, similar to swel Iex bolt, compresses the rock mass through active mechanical interlocking.In this study, the dy namic expansion rock bolt which be able to install rapidly in the drilled hole and more actively to be pressed around rock mass has been suggested.This paper also shows the basic structure and mechanical performance of the suggested rock bolt.Laboratory scale pull-out tests of the rock bolt were performed to evaluate the pull-out load bearing capacity of rock bolt.These revealed that the ultimate pull-out load reached around 10kN and remained constant during a long dis placement, even when the rock bolt was installed in the a steel pipe instead of a hole drilled in rock.
rock bolts dynamic expansion bolt pull-out test rapid installation
Y.Y.Jeong T.U.Ha H.M.Kang M.S.Kim S.K.Kim S.H.Cho
SOC Engineering,Co.,Anyang,South Korea Chonbuk National University,Jeonju,South Korea
国际会议
珠海
英文
77-82
2013-11-22（万方平台首次上网日期，不代表论文的发表时间）