著者

福井 勝則 大久保 誠介 森山 守 青木 智幸 小塚 孝 松原 誠

出版者

一般社団法人 資源・素材学会

雑誌

Journal of MMIJ : journal of the Mining and Materials Processing Institute of Japan (ISSN:18816118)

巻号頁・発行日

vol.123, no.9, pp.467-474, 2007-10-25

参考文献数

14

被引用文献数

2

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The main drive of Hida Tunnel for Tokai-Hokuriku Highway was excavated by a world-largest-class TBM with the diameter of 12.84 m. The TBM have bored over 3.0 km of the tunnel through Nouhi Rhyolite, Granite Porphyry and Hida Gneiss. The uniaxial compressive strength of these rocks was found to be extremely high. Such high strength accompanied by high content of silicon dioxide resulted in significantly high wear rate of the disc cutters mounted on the TBM.<BR>In this study, cutter wear was carefully measured together with the operation conditions such as thrust force, penetration rate, cutter-head rotation rate and the rock properties such as uniaxial compressive strength, rock strength estimated from TBM cutting force, abrasivity obtained from turning operation test, chemical composition determined by X-ray analytical microscope.<BR>It was found that the extent of cutter wear largely depends on position of the disc cutter; cutter wear per unit rolling distance near the fringe of cutter head was extremely larger than that near the center of cutter head. A combination of rock strength estimated by TBM cutting force and length of wear flat in turning-operation test was found to be an excellent index to predict cutter wear rate.