小丸川水力発電所用斜坑リーミングTBMの開発

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タイトル別名
  • Development of an Inclined Shaft Reaming Machine for Omarugawa Hydroelectric Power Plant
  • オマルガワ スイリョク ハツデン ショヨウ シャコウ リーミング TBM ノ カイハツ

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Tunnel boring machine is one of the accepted methods for infrastructural projects for tunnel ventilation or surge shaft in hydroelectric power projects. It is also a widely used technology in the installation of production and ventilation shafts and ore passes for mines. For large diameter inclined shaft boring, there are two solutions: Full-face blind shaft boring machine (FM) and Shaft reaming machine (RM) . In the latter case the excavated muck falls through the pilot hole to a lower level. The pilot hole of a small diameter can be also excavated with a raise-boring machine. Through the careful and comprehensive discussion, a RM was found to be appropriate for our target project (Omarugawa hydroelectric power project) . In the development process, very valuable data taken in former Kazunogawa hydroelectric power project were carefully examined and necessary modifications were done to a new machine for Omarugawa. Special care was taken in designing the cutterhead to optimize the shape for best cutting efficiency and muck removal performance.<BR>1. Open type cutterhead for lightweight machine and easy access to machine parts and tunnel wall.<BR>2. Cone-shape cutterhead for optimum disc cutter arrangement, good face stability and efficient muck removal.<BR>3. Two vertical supports in pilot and reamed shafts for flexible direction control and excellent maneuverability.<BR>Finally, it should be noted that the developed machine had successfully completed the inclined shaft without significant troubles.

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  • 資源と素材

    資源と素材 128 (6), 241-247, 2012

    一般社団法人 資源・素材学会

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