Study on seepage and failure characteristics of soil at the bottom of thick loose layer in thin bedrock area
In order to study the seepage deformation and failure characteristics of the bottom soil mass of the thick loose layer in the thin bedrock area, the relevant safe mining and hydro-geological conditions are systematically analyzed based on the shallow area of the fifth and sixth mining areas in the w...
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| Format: | Article |
| Language: | zho |
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Editorial Office of Safety in Coal Mines
2025-02-01
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| Series: | Meikuang Anquan |
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| Online Access: | https://www.mkaqzz.com/cn/article/doi/10.13347/j.cnki.mkaq.20231656 |
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| author | Yanxin LIU Yuliang WU Fang KANG Shuyun ZHU |
| author_facet | Yanxin LIU Yuliang WU Fang KANG Shuyun ZHU |
| author_sort | Yanxin LIU |
| collection | DOAJ |
| description | In order to study the seepage deformation and failure characteristics of the bottom soil mass of the thick loose layer in the thin bedrock area, the relevant safe mining and hydro-geological conditions are systematically analyzed based on the shallow area of the fifth and sixth mining areas in the west of Baodian Coal Mine. A mechanical model of the arrayed arch of clay sand particles at the mining fracture is established. From the perspective of mining conditions and the actual mechanical environment of the bottom soil, the seepage failure analysis of the bottom soil is carried out, and the mechanical equilibrium condition of critical instability and the critical flow velocity equation of transitional arch failure are presented. On this basis, through a large number of laboratory model tests, the critical hydraulic slope corresponding to the seepage failure of the soil at the bottom of the overlying loose layer under 7 different particle compositions and different mining fracture conditions was obtained. The results of the water-sand surge test under mining and non-mining conditions were compared and analyzed. It is found that the sand surge under mining conditions can be divided into three stages: the stable sand surge stage, the sudden reduction of sand surge and the water inrush stage. |
| format | Article |
| id | doaj-art-bb8ba09a46ae4ff7a8ee47ed86bb3cc9 |
| institution | DOAJ |
| issn | 1003-496X |
| language | zho |
| publishDate | 2025-02-01 |
| publisher | Editorial Office of Safety in Coal Mines |
| record_format | Article |
| series | Meikuang Anquan |
| spelling | doaj-art-bb8ba09a46ae4ff7a8ee47ed86bb3cc92025-08-20T03:01:32ZzhoEditorial Office of Safety in Coal MinesMeikuang Anquan1003-496X2025-02-0156220321110.13347/j.cnki.mkaq.20231656gMKAQ20231656Study on seepage and failure characteristics of soil at the bottom of thick loose layer in thin bedrock areaYanxin LIU0Yuliang WU1Fang KANG2Shuyun ZHUBaodian Coal Mine, Yankuang Energy Group Company Limited, Zoucheng 273513, ChinaBaodian Coal Mine, Yankuang Energy Group Company Limited, Zoucheng 273513, ChinaXinglongzhuang Coal Mine, Yankuang Energy Group Company Limited, Yanzhou 272102, ChinaIn order to study the seepage deformation and failure characteristics of the bottom soil mass of the thick loose layer in the thin bedrock area, the relevant safe mining and hydro-geological conditions are systematically analyzed based on the shallow area of the fifth and sixth mining areas in the west of Baodian Coal Mine. A mechanical model of the arrayed arch of clay sand particles at the mining fracture is established. From the perspective of mining conditions and the actual mechanical environment of the bottom soil, the seepage failure analysis of the bottom soil is carried out, and the mechanical equilibrium condition of critical instability and the critical flow velocity equation of transitional arch failure are presented. On this basis, through a large number of laboratory model tests, the critical hydraulic slope corresponding to the seepage failure of the soil at the bottom of the overlying loose layer under 7 different particle compositions and different mining fracture conditions was obtained. The results of the water-sand surge test under mining and non-mining conditions were compared and analyzed. It is found that the sand surge under mining conditions can be divided into three stages: the stable sand surge stage, the sudden reduction of sand surge and the water inrush stage.https://www.mkaqzz.com/cn/article/doi/10.13347/j.cnki.mkaq.20231656water-sand surgewater damage controlthick loose layerthin bedrockmining bottom soil massseepage failure |
| spellingShingle | Yanxin LIU Yuliang WU Fang KANG Shuyun ZHU Study on seepage and failure characteristics of soil at the bottom of thick loose layer in thin bedrock area Meikuang Anquan water-sand surge water damage control thick loose layer thin bedrock mining bottom soil mass seepage failure |
| title | Study on seepage and failure characteristics of soil at the bottom of thick loose layer in thin bedrock area |
| title_full | Study on seepage and failure characteristics of soil at the bottom of thick loose layer in thin bedrock area |
| title_fullStr | Study on seepage and failure characteristics of soil at the bottom of thick loose layer in thin bedrock area |
| title_full_unstemmed | Study on seepage and failure characteristics of soil at the bottom of thick loose layer in thin bedrock area |
| title_short | Study on seepage and failure characteristics of soil at the bottom of thick loose layer in thin bedrock area |
| title_sort | study on seepage and failure characteristics of soil at the bottom of thick loose layer in thin bedrock area |
| topic | water-sand surge water damage control thick loose layer thin bedrock mining bottom soil mass seepage failure |
| url | https://www.mkaqzz.com/cn/article/doi/10.13347/j.cnki.mkaq.20231656 |
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