Drilling experiment research on bedding directional drilling of soft—fragmentized coal seam of Qinglong Coal Mine
For problems of shallow gas drainage hole depth, low control precision of drilling trajectory and poor gas drainage effect in soft—fragmentized coal seam of Qinglong Coal Mine, based on the analysis of mine gas geological conditions and existing pre—drainage modes, principle and key technologies of...
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| Principais autores: | , , , |
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| Formato: | Artigo |
| Idioma: | Chinês |
| Publicado em: |
Editorial Department of Industry and Mine Automation
2018-11-01
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| coleção: | Gong-kuang zidonghua |
| Assuntos: | |
| Acesso em linha: | http://www.gkzdh.cn/article/doi/10.13272/j.issn.1671—251x.17371 |
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