Influence of Drill Pipe Type on Drilling and Slagging in Soft Coal Seam
In view of the problem of pressure air exhaust slag by borehole along the soft coal seam, the minimum air pressure and its calculation method are determined by analyzing the variation law of the air pressure and air volume in the two kinds of drilling construction through the field test. The result...
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| Format: | Article |
| Language: | zho |
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Editorial Office of Safety in Coal Mines
2020-05-01
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| Series: | Meikuang Anquan |
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| Online Access: | https://www.mkaqzz.com/cn/article/id/6817 |