Study on the safety distance determination model for natural gas wells in Ordos Basin subsidence areas of coal mining
Abstract To optimize the safe distance between coal mining faces and natural gas wells, with the Ordos Basin as the engineering background for the intersectional development of natural gas and coal resources, a Gaussian function equation for subsidence curves under complete mining was proposed based...
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| Format: | Article |
| Language: | English |
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Springer
2025-01-01
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| Series: | Geomechanics and Geophysics for Geo-Energy and Geo-Resources |
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| Online Access: | https://doi.org/10.1007/s40948-024-00917-z |
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| author | Wen Wang Yang Zhang Shuang Gong Junqi Lei Jiandong Ren Yanxiong Ding Xiaowei Lu |
| author_facet | Wen Wang Yang Zhang Shuang Gong Junqi Lei Jiandong Ren Yanxiong Ding Xiaowei Lu |
| author_sort | Wen Wang |
| collection | DOAJ |
| description | Abstract To optimize the safe distance between coal mining faces and natural gas wells, with the Ordos Basin as the engineering background for the intersectional development of natural gas and coal resources, a Gaussian function equation for subsidence curves under complete mining was proposed based on the probability integral method, and a model was constructed to determine the coordinated mining safety distance between coal mining faces and natural gas wells. Based on the distributed optical fiber monitoring principle of the BOTDR technology, on-site monitoring of the simulated monitoring well GX1 within the safety distance was carried out. The results indicated that the maximum strain change values of the outer casing and inner production casing of the simulated monitoring well GX1 were 836 με and 766 με, respectively, far less than the maximum ultimate tensile strain value of the overlying rock at the same depth position. Furthermore, the casing structure possessed ample resistance capability, ensuring no noticeable deformation occurred. Through comparison, it was found that the discriminant model reduced the reserved safety distance between the coal mining working face and the natural gas well by 58% compared with the currently used avoidance method of the surface subsidence boundary, liberated coal resources, and achieved a "win–win" situation of the coordinated mining of natural gas resources and coal resources. It can reasonably adjust the coordinated mining problem without a natural gas-coal co-mining mechanism, provide a new method for the layout of natural gas wells in gas-coal overlapping areas, and provide new ideas for the coordinated mining of coal-related associated resources. |
| format | Article |
| id | doaj-art-427bcea5eaf64a4ab220939ee3d24fcd |
| institution | Kabale University |
| issn | 2363-8419 2363-8427 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | Springer |
| record_format | Article |
| series | Geomechanics and Geophysics for Geo-Energy and Geo-Resources |
| spelling | doaj-art-427bcea5eaf64a4ab220939ee3d24fcd2025-01-26T12:57:41ZengSpringerGeomechanics and Geophysics for Geo-Energy and Geo-Resources2363-84192363-84272025-01-0111112610.1007/s40948-024-00917-zStudy on the safety distance determination model for natural gas wells in Ordos Basin subsidence areas of coal miningWen Wang0Yang Zhang1Shuang Gong2Junqi Lei3Jiandong Ren4Yanxiong Ding5Xiaowei Lu6School of Energy Science and Engineering, Henan Polytechnic UniversitySchool of Energy Science and Engineering, Henan Polytechnic UniversitySchool of Energy Science and Engineering, Henan Polytechnic UniversitySchool of Energy Science and Engineering, Henan Polytechnic UniversitySchool of Energy and Mining, China University of Mining and Technology (Beijing)Shaanxi Xiaobaodang Mining Co., Ltd.School of Safety Engineering, China University of Mining and TechnologyAbstract To optimize the safe distance between coal mining faces and natural gas wells, with the Ordos Basin as the engineering background for the intersectional development of natural gas and coal resources, a Gaussian function equation for subsidence curves under complete mining was proposed based on the probability integral method, and a model was constructed to determine the coordinated mining safety distance between coal mining faces and natural gas wells. Based on the distributed optical fiber monitoring principle of the BOTDR technology, on-site monitoring of the simulated monitoring well GX1 within the safety distance was carried out. The results indicated that the maximum strain change values of the outer casing and inner production casing of the simulated monitoring well GX1 were 836 με and 766 με, respectively, far less than the maximum ultimate tensile strain value of the overlying rock at the same depth position. Furthermore, the casing structure possessed ample resistance capability, ensuring no noticeable deformation occurred. Through comparison, it was found that the discriminant model reduced the reserved safety distance between the coal mining working face and the natural gas well by 58% compared with the currently used avoidance method of the surface subsidence boundary, liberated coal resources, and achieved a "win–win" situation of the coordinated mining of natural gas resources and coal resources. It can reasonably adjust the coordinated mining problem without a natural gas-coal co-mining mechanism, provide a new method for the layout of natural gas wells in gas-coal overlapping areas, and provide new ideas for the coordinated mining of coal-related associated resources.https://doi.org/10.1007/s40948-024-00917-zCross-exploitation of natural gas and coalSurface subsidence curveSafety distanceCoordinated miningDiscrimination model |
| spellingShingle | Wen Wang Yang Zhang Shuang Gong Junqi Lei Jiandong Ren Yanxiong Ding Xiaowei Lu Study on the safety distance determination model for natural gas wells in Ordos Basin subsidence areas of coal mining Geomechanics and Geophysics for Geo-Energy and Geo-Resources Cross-exploitation of natural gas and coal Surface subsidence curve Safety distance Coordinated mining Discrimination model |
| title | Study on the safety distance determination model for natural gas wells in Ordos Basin subsidence areas of coal mining |
| title_full | Study on the safety distance determination model for natural gas wells in Ordos Basin subsidence areas of coal mining |
| title_fullStr | Study on the safety distance determination model for natural gas wells in Ordos Basin subsidence areas of coal mining |
| title_full_unstemmed | Study on the safety distance determination model for natural gas wells in Ordos Basin subsidence areas of coal mining |
| title_short | Study on the safety distance determination model for natural gas wells in Ordos Basin subsidence areas of coal mining |
| title_sort | study on the safety distance determination model for natural gas wells in ordos basin subsidence areas of coal mining |
| topic | Cross-exploitation of natural gas and coal Surface subsidence curve Safety distance Coordinated mining Discrimination model |
| url | https://doi.org/10.1007/s40948-024-00917-z |
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