Application research on roadway protection technology by hydraulic fracturing roof cutting pressure relief in underground coal mine
The gas concentration of No.8 coal seam in north 3 panel of Duerping Coal Mine is high, the direct roof and the basic roof are both hard limestone, and it is easy to form a large area of hanging roof in the upper corner after stoping on working face, which is not easy to collapse naturally in a shor...
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| Format: | Article |
| Language: | zho |
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Editorial Department of Industry and Mine Automation
2019-10-01
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| Series: | Gong-kuang zidonghua |
| Subjects: | |
| Online Access: | http://www.gkzdh.cn/article/doi/10.13272/j.issn.1671-251x.17474 |