衝撃貫入試験におけるボタンビットの貫入特性  [in Japanese] Force-Penetration Curves with a Button Bit in the Percussive Drilling  [in Japanese]

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Author(s)

Abstract

A force-penetration relationship is considered to be closely related to the deformation and fracture mechanism at the bit-rock interface. In this study, a testing machine in which a piston, a rod or a bit can be easily changed was developed for laboratory impact-penetration test simulating the in-situ percussive drilling. A series of percussive drilling tests with a button bit against Inada granite were carried out to examine and discuss the drilling performace. Stress waves were measured at two locations 1.91 m apart along the rod, and then force-penetration curve of the button bit was calculated by measured strain/stress wave. Main results are summarized as follows:<BR>1) Delay of traveling time at bit can be expressed by a slit bit model.<BR>2) Variation in the slope of force-penetration curves in laboratory tests was very similar to that in in-situ percussive drilling.<BR>3) In spite of large scatter in the slope of force-penetration curves, the elastic deformations of rock surface were almost constant.

Journal

  • Journal of MMIJ

    Journal of MMIJ 126(8), 512-518, 2010-08-25

    The Mining and Materials Processing Institute of Japan

References:  13

Codes

  • NII Article ID (NAID)
    10026493243
  • NII NACSIS-CAT ID (NCID)
    AA12188381
  • Text Lang
    JPN
  • Article Type
    ART
  • ISSN
    18816118
  • NDL Article ID
    10808407
  • NDL Source Classification
    ZP41(科学技術--金属工学・鉱山工学)
  • NDL Call No.
    Z17-315
  • Data Source
    CJP  NDL  J-STAGE 
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