書誌事項
- タイトル別名
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- Measuring Strain on Short Drill Rods
- ミジカイ ロッド ニ オケル ヒズミ ケイソク
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Strain measurements are conducted on drill rods to investigate the rock drillability for percussion drilling. When the length of drill rod with a uniform cross section is short, the method of two-point strain measurement must be employed to separate an incident wave and a reflective wave.<BR>Strain measurements on two types of short drill rod (rod 1 and rod 2) using the two-point method are described. Results from experimental measurements using rod 1 include the following:<BR> (1) An accurate analysis of strain at the evaluation point could not be obtained when the 4-gage method was applied. On the other hand, accurate strain measurements were obtained using the 2-gage method (opposite side) .<BR> (2) Measurements using strain gages of length 5 mm were more suitable for the analysis of strain at the evaluation point than measurements using 2-mm strain gages.<BR> Results from tests to measure strain in two parts of rod 2 (part S and part F) include the following:<BR> (3) A complete measurement of a strain wave could not be obtained at part S, even using the 2-gage method. However, approximately two-thirds of the wave could be analyzed correctly.<BR> (4) For part F, an almost complete measurement of the strain wave was obtained using the 2-gage method. In addition, the similarity of the strain waves of part S and part F was confirmed.<BR>Finally, based on the results for rod 2, the complete percussion energy per hammer blow for part S was estimated.
収録刊行物
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- 資源と素材
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資源と素材 127 (1), 39-45, 2010
一般社団法人 資源・素材学会
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詳細情報 詳細情報について
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- CRID
- 1390001205275488384
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- NII論文ID
- 10027624666
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- NII書誌ID
- AA12188381
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- ISSN
- 18840450
- 18816118
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- NDL書誌ID
- 10930167
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- 本文言語コード
- ja
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- データソース種別
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- JaLC
- NDL
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- 使用不可