Dense boreholes for weakening bottom layer by cutting roof and pressure relief of gob-side entry retaining
In order to ensure the safe and smooth process of gob-side entry retaining of high stress thick coal seam bottom layer in Guhanshan Coal Mine, combined with the broken condition and gas condition of the regenerated roof, the necessity of adopting dense borehole to cut roof and relieve pressure of t...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | zho |
| Published: |
Editorial Office of Safety in Coal Mines
2022-07-01
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| Series: | Meikuang Anquan |
| Subjects: | |
| Online Access: | https://www.mkaqzz.com/cn/article/id/8028 |