Rockbolts made of steel pipes

• Main Authors: KITTAKA TOSHIHARU, ITOU TETSUO, NAKATA MASAHIRO, SHIROMA HIROMICHI, IWASAKI TATSUROU, OOSHIMA KENJI, TANASE HIROYUKI, NAKAKO TAKEFUMI, YOSHIDA TAKEYUKI
• Format: Patent
• Language: English
• Published: 19.04.2011
• Subjects: EARTH DRILLING; FIXED CONSTRUCTIONS; GALLERIES; LARGE UNDERGROUND CHAMBERS; MINING; SHAFTS; TUNNELS

A sleeve 10 for introduction of a pressurized fluid, which is attached to a rockbolt main body 1, comprises a cylindrical projecting part 11 of a large diameter and a bearing-plate-holding part 12 of a diameter smaller than an aperture of a bearing plate 6. The projecting part 11 and the bearing-pla...