Studying the effects of borehole length on the impact drilling speed in different rocks
The performed tests in this work include a wide range of rock masses of the Kopaonik massive of different strength (f = 2.3 - 16). Drilling was done with drill hammers VK-24 and RK-21 at optimum sharpening angle with different drill rod lengths (0.8, 1.2, 1.6, 2.4 and 3.2). Compressed air pressure i...
| 發表在: | Mining and Metallurgy Engineering Bor |
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| Main Authors: | , , |
| 格式: | Article |
| 語言: | 英语 |
| 出版: |
Mining and Metallurgy Institute, Bor
2014-01-01
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| 主題: | |
| 在線閱讀: | https://scindeks-clanci.ceon.rs/data/pdf/2334-8836/2014/2334-88361402123S.pdf |