Effects of Coal Mining Height and Width on Overburden Subsidence in Longwall Pier-Column Backfilling
Longwall pier-column backfilling is a partial backfilling technique initially designed in thin coal seam mines. With the increase of mining intensity, the mining height and width of the backfilling working face will also increase. It is necessary to analyze how changes in working face dimensions inf...
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| Format: | Article |
| Language: | English |
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MDPI AG
2021-03-01
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| Series: | Applied Sciences |
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| Online Access: | https://www.mdpi.com/2076-3417/11/7/3105 |
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| author | Xiaozhen Wang Jianlin Xie Jialin Xu Weibing Zhu Limin Wang |
| author_facet | Xiaozhen Wang Jianlin Xie Jialin Xu Weibing Zhu Limin Wang |
| author_sort | Xiaozhen Wang |
| collection | DOAJ |
| description | Longwall pier-column backfilling is a partial backfilling technique initially designed in thin coal seam mines. With the increase of mining intensity, the mining height and width of the backfilling working face will also increase. It is necessary to analyze how changes in working face dimensions influence the control effect of overburden subsidence in pier-column backfilling. In this study, a mining model with a combination of 25 conditions (five different mining heights (1~3 m) × five different mining widths (80~240 m)) was designed using a FLAC3D (Vision 5.0) numerical simulation. The simulation was used to analyze the control effect of overburden subsidence with varying mining heights and widths. In addition, according to the field working face conditions, two physical similarity models were performed to explore the overburden subsidence law in pier-column backfilling with different mining heights and widths. It was observed from the above study that mining heights and widths will have a different influence on the overburden subsidence in longwall pier-column backfilling. The result of this study provides strong theoretical support for evaluating the control effect of overburden subsidence in longwall pier-column backfilling. |
| first_indexed | 2024-03-10T12:44:57Z |
| format | Article |
| id | doaj.art-d6d29bf390e54834885af211316df6b1 |
| institution | Directory Open Access Journal |
| issn | 2076-3417 |
| language | English |
| last_indexed | 2024-03-10T12:44:57Z |
| publishDate | 2021-03-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Applied Sciences |
| spelling | doaj.art-d6d29bf390e54834885af211316df6b12023-11-21T13:35:53ZengMDPI AGApplied Sciences2076-34172021-03-01117310510.3390/app11073105Effects of Coal Mining Height and Width on Overburden Subsidence in Longwall Pier-Column BackfillingXiaozhen Wang0Jianlin Xie1Jialin Xu2Weibing Zhu3Limin Wang4State Key Laboratory of Coal Resources and Safe Mining, China University of Mining and Technology, Xuzhou 221116, ChinaState Key Laboratory of Coal Resources and Safe Mining, China University of Mining and Technology, Xuzhou 221116, ChinaState Key Laboratory of Coal Resources and Safe Mining, China University of Mining and Technology, Xuzhou 221116, ChinaSchool of Mines, China University of Mining and Technology, Xuzhou 221116, ChinaState Key Laboratory of Coal Resources and Safe Mining, China University of Mining and Technology, Xuzhou 221116, ChinaLongwall pier-column backfilling is a partial backfilling technique initially designed in thin coal seam mines. With the increase of mining intensity, the mining height and width of the backfilling working face will also increase. It is necessary to analyze how changes in working face dimensions influence the control effect of overburden subsidence in pier-column backfilling. In this study, a mining model with a combination of 25 conditions (five different mining heights (1~3 m) × five different mining widths (80~240 m)) was designed using a FLAC3D (Vision 5.0) numerical simulation. The simulation was used to analyze the control effect of overburden subsidence with varying mining heights and widths. In addition, according to the field working face conditions, two physical similarity models were performed to explore the overburden subsidence law in pier-column backfilling with different mining heights and widths. It was observed from the above study that mining heights and widths will have a different influence on the overburden subsidence in longwall pier-column backfilling. The result of this study provides strong theoretical support for evaluating the control effect of overburden subsidence in longwall pier-column backfilling.https://www.mdpi.com/2076-3417/11/7/3105mining heightmining widthlongwall miningpier-column backfillingoverburden subsidence |
| spellingShingle | Xiaozhen Wang Jianlin Xie Jialin Xu Weibing Zhu Limin Wang Effects of Coal Mining Height and Width on Overburden Subsidence in Longwall Pier-Column Backfilling Applied Sciences mining height mining width longwall mining pier-column backfilling overburden subsidence |
| title | Effects of Coal Mining Height and Width on Overburden Subsidence in Longwall Pier-Column Backfilling |
| title_full | Effects of Coal Mining Height and Width on Overburden Subsidence in Longwall Pier-Column Backfilling |
| title_fullStr | Effects of Coal Mining Height and Width on Overburden Subsidence in Longwall Pier-Column Backfilling |
| title_full_unstemmed | Effects of Coal Mining Height and Width on Overburden Subsidence in Longwall Pier-Column Backfilling |
| title_short | Effects of Coal Mining Height and Width on Overburden Subsidence in Longwall Pier-Column Backfilling |
| title_sort | effects of coal mining height and width on overburden subsidence in longwall pier column backfilling |
| topic | mining height mining width longwall mining pier-column backfilling overburden subsidence |
| url | https://www.mdpi.com/2076-3417/11/7/3105 |
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