書誌事項
- タイトル別名
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- Fundamental Tests and Operational Suitability Tests on the Fields
- 高速水噴流による大口径ボーリングに関する研究 (第2報)
- Large diameter boring by using water jets (2nd Report)
- 公開日
- 1987
- DOI
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- 10.2473/shigentosozai1953.103.1195_555
- 公開者
- 一般社団法人 資源・素材学会
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説明
In this report, the results of large diameter drilling tests in coal seams assisted with water jetsare described.<BR>The results of these tests are summarized as follows.<BR>(1) The length of the longest drill hole in the coal seam is 70m at Taiheiyo coal mine and thediameter of the most enlarged borehole is about 700mm at Akabira coal mine.<BR>(2) Some measurements on the fundamental tests (gas flow, volume of cuttings, reduction of the stressin coal seam etc.) during drilling of the borehole indicated that a large diameter borehole made by using water jets wasas effective as drilling with the conventional methods.<BR>(3) The penetration rate on the fundamental tests was 3.5 times as fast as with the conventionalmethod and it on the operational suitability tests was 1.5 times as fast as conventional method and the time to set up thedrilling unit was reduced to 50%
収録刊行物
-
- 日本鑛業會誌
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日本鑛業會誌 103 (1195), 555-561, 1987
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
- 1390282680958899072
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- NII論文ID
- 130007256100
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- ISSN
- 21856729
- 03694194
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- データソース種別
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- JaLC
- Crossref
- CiNii Articles
- OpenAIRE
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- 抄録ライセンスフラグ
- 使用不可
