ボーリングに関する研究

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書誌事項

タイトル別名
  • On the Penetration Rate of a Diamond Core Bit
  • ボーリング ニ カンスル ケンキュウ
  • ダイヤモンド・コアピットによる穿孔試験

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抄録

Full instrumentation is made on a medium size boring machine to speed up the experiments and to get more precise data. Penetration rate, torque, thrust and pressure of water supply can be recorded automatically on four channel pen-writing oscillograph. All results are of laboratory studies bored into the rock specimens ranging from hard to soft formations. Diamond bit used is a surface setting core bit, 46mm in size, having 12 carat setting. Rotation speed and volume of water supply are variable as parameter. Main results obtained from these experiments are as follows:<BR>1) Penetration rate is almost proportional to thrust and rotation speed of bit<BR>2) Relation between thrust and torque is almost constant for all rocks and this relation does not change by rotation speed.<BR>3) Max. penetration rate is proportional to volume of water supply in the case of the rotation speed i constant.<BR>4) Max. penetration rate is proportional to square root of rotation speed and the max. thrust corresponding to max. penetration rate is inversely proportional to square root of rotation speed.<BR>5) Penetration rate and max. thrust for each rock can be presumed from the shore hardness, indentation depth and compressive strength of the rock.

収録刊行物

  • 日本鑛業會誌

    日本鑛業會誌 76 (860), 75-82, 1960

    一般社団法人 資源・素材学会

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