Study on deformation control of overlying strata in short-wall coordinated filling mining of thick coal seam under aquifer
The mining of coal resources and the protection of water resources are often in opposition, and this contradiction is more prominent in the mining of thick coal seams due to the difficulty of controlling the overburden deformation. Based on the mining conditions of thick coal seam under the main aqu...
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| Format: | Article |
| Language: | English |
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Frontiers Media S.A.
2023-01-01
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| Series: | Frontiers in Earth Science |
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| Online Access: | https://www.frontiersin.org/articles/10.3389/feart.2022.1097551/full |
| _version_ | 1811175479435067392 |
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| author | Yinan Yao Yinan Yao Pengfei Jiang Nan Zhou Nan Zhou Erbao Du Erbao Du |
| author_facet | Yinan Yao Yinan Yao Pengfei Jiang Nan Zhou Nan Zhou Erbao Du Erbao Du |
| author_sort | Yinan Yao |
| collection | DOAJ |
| description | The mining of coal resources and the protection of water resources are often in opposition, and this contradiction is more prominent in the mining of thick coal seams due to the difficulty of controlling the overburden deformation. Based on the mining conditions of thick coal seam under the main aquifer of a coal mine in the water shortage area of Northwest China, this paper puts forward the short-wall coordinated filling mining (SCFM) of thick coal seam. The stress analysis of the overall structure consisting of the top and bottom plates, coal pillars and filler at each stage of the mining process was carried out, the length of the short-walled working face suitable for this coal mine was derived, and the key parameters for the mining of the three pan areas of the mine were designed. The analysis results show that the sensitivity of the maximum tensile stress in the roof to the length of the working face is better than the filling rate in the case of short-walled working face arrangement. When the design coal mine working face length is 40 m and the filling rate is 95%, the overburden fissure development height can be controlled to 58.45 m after the whole area of three pan area is retrieved. It is verified by the downhole injection method that the requirement of non-conducting aquifer is satisfied after using SCFM. The research in this paper is of great significance to achieve safe and efficient recovery of coal resources and water conservation under strongly water-rich rock formations. |
| first_indexed | 2024-04-10T19:36:37Z |
| format | Article |
| id | doaj.art-6986934b8979404c8b5c8b971f646490 |
| institution | Directory Open Access Journal |
| issn | 2296-6463 |
| language | English |
| last_indexed | 2024-04-10T19:36:37Z |
| publishDate | 2023-01-01 |
| publisher | Frontiers Media S.A. |
| record_format | Article |
| series | Frontiers in Earth Science |
| spelling | doaj.art-6986934b8979404c8b5c8b971f6464902023-01-30T04:36:07ZengFrontiers Media S.A.Frontiers in Earth Science2296-64632023-01-011010.3389/feart.2022.10975511097551Study on deformation control of overlying strata in short-wall coordinated filling mining of thick coal seam under aquiferYinan Yao0Yinan Yao1Pengfei Jiang2Nan Zhou3Nan Zhou4Erbao Du5Erbao Du6State Key Laboratory of Coal Resources and Safe Mining, China University of Mining and Technology, Xuzhou, Jiangsu, ChinaSchool of Mines, China University of Mining and Technology, Xuzhou, Jiangsu, ChinaCoal Mining Branch, China Coal Research Institute, Beijing, ChinaState Key Laboratory of Coal Resources and Safe Mining, China University of Mining and Technology, Xuzhou, Jiangsu, ChinaSchool of Mines, China University of Mining and Technology, Xuzhou, Jiangsu, ChinaState Key Laboratory of Coal Resources and Safe Mining, China University of Mining and Technology, Xuzhou, Jiangsu, ChinaSchool of Mines, China University of Mining and Technology, Xuzhou, Jiangsu, ChinaThe mining of coal resources and the protection of water resources are often in opposition, and this contradiction is more prominent in the mining of thick coal seams due to the difficulty of controlling the overburden deformation. Based on the mining conditions of thick coal seam under the main aquifer of a coal mine in the water shortage area of Northwest China, this paper puts forward the short-wall coordinated filling mining (SCFM) of thick coal seam. The stress analysis of the overall structure consisting of the top and bottom plates, coal pillars and filler at each stage of the mining process was carried out, the length of the short-walled working face suitable for this coal mine was derived, and the key parameters for the mining of the three pan areas of the mine were designed. The analysis results show that the sensitivity of the maximum tensile stress in the roof to the length of the working face is better than the filling rate in the case of short-walled working face arrangement. When the design coal mine working face length is 40 m and the filling rate is 95%, the overburden fissure development height can be controlled to 58.45 m after the whole area of three pan area is retrieved. It is verified by the downhole injection method that the requirement of non-conducting aquifer is satisfied after using SCFM. The research in this paper is of great significance to achieve safe and efficient recovery of coal resources and water conservation under strongly water-rich rock formations.https://www.frontiersin.org/articles/10.3389/feart.2022.1097551/fullwater protection miningshort-wall coordinated filling miningoverburden deformationfracture developmentengineering design |
| spellingShingle | Yinan Yao Yinan Yao Pengfei Jiang Nan Zhou Nan Zhou Erbao Du Erbao Du Study on deformation control of overlying strata in short-wall coordinated filling mining of thick coal seam under aquifer Frontiers in Earth Science water protection mining short-wall coordinated filling mining overburden deformation fracture development engineering design |
| title | Study on deformation control of overlying strata in short-wall coordinated filling mining of thick coal seam under aquifer |
| title_full | Study on deformation control of overlying strata in short-wall coordinated filling mining of thick coal seam under aquifer |
| title_fullStr | Study on deformation control of overlying strata in short-wall coordinated filling mining of thick coal seam under aquifer |
| title_full_unstemmed | Study on deformation control of overlying strata in short-wall coordinated filling mining of thick coal seam under aquifer |
| title_short | Study on deformation control of overlying strata in short-wall coordinated filling mining of thick coal seam under aquifer |
| title_sort | study on deformation control of overlying strata in short wall coordinated filling mining of thick coal seam under aquifer |
| topic | water protection mining short-wall coordinated filling mining overburden deformation fracture development engineering design |
| url | https://www.frontiersin.org/articles/10.3389/feart.2022.1097551/full |
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