Zonal-adaptive caving control technology and its mechanisms for improving extraction efficiency of variable-thickness seams
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Le résumé fourni par la source
Top coal caving mining is one of the important mining technologies for thick coal seam mining. With the advance of the working face, some fully mechanized top-coal caving seams will have coal thickness changes, which will have a great impact on the top-coal recovery rate. Based on the 2113 working face of Shanxi Huajin Jining Coal Industry Co., Ltd., this study designed the coal caving process scheme with different mining height (1.0 ~ 3.5 m) and mining-to-caving ratio (1:0.4 ~ 1:1.4). Through discrete element numerical simulation, the movement of overlying strata and top coal, the shape change of top-coal caving body and the change rule of top-coal recovery rate under different mining height and mining-to-caving ratio were analyzed, and the reasonable caving parameters were determined. The experimental findings demonstrate that in the thick-seam section of the face periphery unaffected by mining-induced effects, the optimal cutting-to-caving ratio ranges between 1:0.6 and 1:0.4. For the thin-seam section in the face interior subjected to upper-seam extraction impacts, the preferred cutting height is confined to 3.0–3.5 m.Through iterative refinement of these parameter ranges, the optimized caving strategy achieves maximum operational efficiency: peripheral section: cutting height = 3.8 m/Caving height = 2.4 m, Interior section: cutting height = 3.5 m/caving height = 0.5 m. This configuration yields a peak resource recovery rate of 81.2%. The research results verify the feasibility of the segmented optimization process of different thickness coal seam and provide technical reference for the safe and efficient mining of complex variable-thickness coal seam.
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Le contrôle bibliographique ouvert
DOI retrouvé dans Crossref DOI retrouvé ; titre concordant.
- Titre Crossref
- Zonal-adaptive caving control technology and its mechanisms for improving extraction efficiency of variable-thickness seams
- Date Crossref
- 01/12/2025
- Éditeur
- Elsevier BV
- 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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China University of Mining and Technology Sino-Türkiye Research Center for Thick Coal Seam Mining pays non établi dans la noticeUniversité ou école supérieure
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Inner Mongolia University of Science and Technology pays non établi dans la noticeUniversité ou école supérieure
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Xinjiang Institute of Engineering pays non établi dans la noticeUniversité ou école supérieure
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Inner Mongolia University of Technology pays non établi dans la noticeUniversité ou école supérieure
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Key Laboratory of Xinjiang Coal Resources Green Mining pays non établi dans la noticeStructure de recherche
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School of Energy and Mining Engineering pays non établi dans la noticeUniversité ou école supérieure
Sino-Türkiye Research Center for Thick Coal Seam Mining — China University of Mining and Technology, Inner Mongolia University of Science and Technology et Xinjiang Institute of Engineering, avec 3 autres affiliations.
Une affiliation ne permet pas de déduire la nationalité d’un auteur.