Analysis of the EFARC non-pillar mining stope: roof failure and overlying pressure in inclined coal seams
Abstract During the process of coal mining, there is a violent appearance of mining stress when the initial weighting occurs. To guarantee the safety of the gob-side entry formed automatically by roof-cutting (EFARC) in an inclined coal seam, a study was conducted on the initial weighting mechanism...
| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | English |
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Springer
2023-11-01
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| Series: | Geomechanics and Geophysics for Geo-Energy and Geo-Resources |
| Subjects: | |
| Online Access: | https://doi.org/10.1007/s40948-023-00691-4 |
| _version_ | 1827707672612306944 |
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| author | Enze Zhen Shizhuo Dong Jian Huang Yajun Wang Mengxiang Wang Xinyue Zhang Yizhe Tao |
| author_facet | Enze Zhen Shizhuo Dong Jian Huang Yajun Wang Mengxiang Wang Xinyue Zhang Yizhe Tao |
| author_sort | Enze Zhen |
| collection | DOAJ |
| description | Abstract During the process of coal mining, there is a violent appearance of mining stress when the initial weighting occurs. To guarantee the safety of the gob-side entry formed automatically by roof-cutting (EFARC) in an inclined coal seam, a study was conducted on the initial weighting mechanism and appearance characteristics through field monitoring and theoretical analysis. The findings reveal that, upon the initial breaking of the main roof in the non-pillar mining stope of an inclined coal seam, the deflection of the thin plate structure exhibits asymmetric distribution, with the maximum position situated in the middle-upper part of the thin plate. As the main roof thin plate reaches its limit interval, the tensile fracture first occurs in the middle-upper part of the coal wall in front and back of the stope. Once broken, the thin plate changes to a simply supported state. The analysis of field data reveals that the mine pressure in the non-pillar stope of EFARC shows an asymmetric weighting phenomenon. The periodic weighting interval at the ends of the working face increases, and the weighting intensity decreases. These results can serve as theoretical support for controlling mine pressure in non-pillar mining through EFARC in inclined coal seams and can serve as a basis for further investigations in this area. |
| first_indexed | 2024-03-10T16:51:49Z |
| format | Article |
| id | doaj.art-6e2383482fc346d1856dedde1fadf756 |
| institution | Directory Open Access Journal |
| issn | 2363-8419 2363-8427 |
| language | English |
| last_indexed | 2024-03-10T16:51:49Z |
| publishDate | 2023-11-01 |
| publisher | Springer |
| record_format | Article |
| series | Geomechanics and Geophysics for Geo-Energy and Geo-Resources |
| spelling | doaj.art-6e2383482fc346d1856dedde1fadf7562023-11-20T11:16:38ZengSpringerGeomechanics and Geophysics for Geo-Energy and Geo-Resources2363-84192363-84272023-11-019111510.1007/s40948-023-00691-4Analysis of the EFARC non-pillar mining stope: roof failure and overlying pressure in inclined coal seamsEnze Zhen0Shizhuo Dong1Jian Huang2Yajun Wang3Mengxiang Wang4Xinyue Zhang5Yizhe Tao6School of Civil Engineering and Architecture, Huangshan UniversityBeijing China Coal Mine Engineering Co. LtdSchool of Civil Engineering and Architecture, Huangshan UniversitySchool of Civil and Resource Engineering, University of Science and Technology BeijingEngineering Research Center of Underground Mine Construction, Ministry of Education (Anhui University of Science and Technology)School of Civil Engineering and Architecture, Huangshan UniversitySchool of Civil Engineering and Architecture, Huangshan UniversityAbstract During the process of coal mining, there is a violent appearance of mining stress when the initial weighting occurs. To guarantee the safety of the gob-side entry formed automatically by roof-cutting (EFARC) in an inclined coal seam, a study was conducted on the initial weighting mechanism and appearance characteristics through field monitoring and theoretical analysis. The findings reveal that, upon the initial breaking of the main roof in the non-pillar mining stope of an inclined coal seam, the deflection of the thin plate structure exhibits asymmetric distribution, with the maximum position situated in the middle-upper part of the thin plate. As the main roof thin plate reaches its limit interval, the tensile fracture first occurs in the middle-upper part of the coal wall in front and back of the stope. Once broken, the thin plate changes to a simply supported state. The analysis of field data reveals that the mine pressure in the non-pillar stope of EFARC shows an asymmetric weighting phenomenon. The periodic weighting interval at the ends of the working face increases, and the weighting intensity decreases. These results can serve as theoretical support for controlling mine pressure in non-pillar mining through EFARC in inclined coal seams and can serve as a basis for further investigations in this area.https://doi.org/10.1007/s40948-023-00691-4Gob-side entry formed automatically by roof cuttingNon-pillar miningInclined coal seamInitial weighting |
| spellingShingle | Enze Zhen Shizhuo Dong Jian Huang Yajun Wang Mengxiang Wang Xinyue Zhang Yizhe Tao Analysis of the EFARC non-pillar mining stope: roof failure and overlying pressure in inclined coal seams Geomechanics and Geophysics for Geo-Energy and Geo-Resources Gob-side entry formed automatically by roof cutting Non-pillar mining Inclined coal seam Initial weighting |
| title | Analysis of the EFARC non-pillar mining stope: roof failure and overlying pressure in inclined coal seams |
| title_full | Analysis of the EFARC non-pillar mining stope: roof failure and overlying pressure in inclined coal seams |
| title_fullStr | Analysis of the EFARC non-pillar mining stope: roof failure and overlying pressure in inclined coal seams |
| title_full_unstemmed | Analysis of the EFARC non-pillar mining stope: roof failure and overlying pressure in inclined coal seams |
| title_short | Analysis of the EFARC non-pillar mining stope: roof failure and overlying pressure in inclined coal seams |
| title_sort | analysis of the efarc non pillar mining stope roof failure and overlying pressure in inclined coal seams |
| topic | Gob-side entry formed automatically by roof cutting Non-pillar mining Inclined coal seam Initial weighting |
| url | https://doi.org/10.1007/s40948-023-00691-4 |
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