Efficient and Stable Gas Drainage Technology for the Entire Life Cycle of Boreholes in Soft Coal Seams
Rattachement africain : cn, gb, ru. Niveau de preuve : code pays fourni par la source.
Le résumé fourni par la source
Gas drainage technology is a crucial method for preventing and controlling coal and gas outburst. To address the susceptibility to deformation of extraction pipes in soft coal seams, three types of internal support extraction pipes (ISEPs) were developed: the horizontal internal support extraction pipe, the Y-shaped internal support extraction pipe, and the cross-shaped internal support extraction pipe. Using a self-developed extraction pipe load deformation-airflow characteristic monitoring system in combination with laboratory experiments and theoretical analysis, the mechanical properties of the extraction pipe and the dynamic evolution of airflow characteristics inside the pipe during deformation were investigated. The findings are as follows: (1) the compressive strength of the ISEP is 1.9-2.8 times that of the ordinary extraction pipe (OEP); (2) the gas flow channel in the ISEP is larger than that in the OEP, resulting in a higher gas drainage efficiency; (3) under compression, the ISEP shows a "multichamber sequential rupture" failure mode, allowing some chambers to continue gas drainage after pipe rupture, whereas the OEP undergoes overall leakage once a single chamber ruptures; and (4) during the compression process of the extraction pipe, the internal airflow changes can be divided into four periods: stable period, deformation period, chamber connection period, and gas leakage period. Among these, the velocity change during the gas leakage period is the most pronounced, and the airflow velocity variation in the OEP during this period is greater than that in the ISEP. In conclusion, the ISEP has been demonstrated to be an effective solution for the prevention of pipe deformation caused by borehole collapse, the extension of the borehole life cycle, and efficient and stable gas drainage from soft coal seams.
Ce résumé expose les affirmations des auteurs. BNTIC ne l’interprète pas comme une validation indépendante des résultats.
Le contrôle bibliographique ouvert
DOI retrouvé dans Crossref DOI retrouvé ; titre concordant.
- Titre Crossref
- Efficient and Stable Gas Drainage Technology for the Entire Life Cycle of Boreholes in Soft Coal Seams
- Date Crossref
- 10/12/2025
- Éditeur
- American Chemical Society (ACS)
- Type
- journal-article
Ce recoupement confirme des métadonnées liées au DOI. Il ne confirme ni la méthode ni les conclusions de l’étude, et il ne compte pas comme une seconde source scientifique indépendante.
Où se fait cette recherche
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Henan Polytechnic University pays non établi dans la noticeUniversité ou école supérieure
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UK Coal pays non établi dans la noticeEntreprise
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Henan Energy & Chemical Industry Group (China) pays non établi dans la noticeEntreprise
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Shaanxi Coal Chemical Industry Technology Research Institute pays non établi dans la noticeStructure de recherche
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Institute of Mining pays non établi dans la noticeStructure de recherche
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Shandong University of Science and Technology pays non établi dans la noticeUniversité ou école supérieure
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School of Safety Science and Engineering pays non établi dans la noticeUniversité ou école supérieure
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Ltd Henan Energy Group Co pays non établi dans la noticeEntreprise
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College of Energy and Mining Engineering pays non établi dans la noticeUniversité ou école supérieure
Henan Polytechnic University, UK Coal et Henan Energy & Chemical Industry Group (China), avec 6 autres affiliations.
Une affiliation ne permet pas de déduire la nationalité d’un auteur.