Prediction of the rock properties ahead of a tunnel face by percussive long-hole drilling

• YAMASHITA Masayuki

• FUKUI Katsunori

• OKUBO Seisuke

抄録

It is essential to know the properties of the rock ahead of the face when digging a tunnel. We examined long-hole exploration drilling as a method of determining the rock properties with the objective of establishing an improved procedure for such surveys. This report describes the results of the development of an improved system for exploration drilling. For convenience, the system, including its data-storage package, was designed to be mounted on a drill jumbo. A large-diameter rod was used at the tip of the extension rods to prevent deviation of the hole, after testing had indicated that this was an issue. A rod with an integrated coupling sleeve was employed to reduce the time required for the test. Dedicated software was also developed to enable semi-automated processing of the data. The above features make the system convenient to use, and provide accurate data of the rock properties ahead of the tunnel face.

収録刊行物

• International Journal of the JSRM

  International Journal of the JSRM 4 (1), 9-13, 2008

  一般社団法人 岩の力学連合会

キーワード

• Tunnel
• Rock properties
• Rock drill
• Sleeve coupling
• Exploration

詳細情報

• CRID: 1390001205477752832
• NII論文ID: 130004597660
• DOI: 10.11187/ijjcrm.4.9
• ISSN: 21864225
• 本文言語コード: en
• データソース種別:
  • JaLC
  • CiNii Articles
• 抄録ライセンスフラグ: 使用不可