Grouting Reinforcement Mechanism and Multimodel Simulation Analysis of Longwall Goaf
Grouting reinforcement is one of the most effective methods to enhance the stability of the goaf, and its scheme selection, hole location, and parameter determination directly affect the success or failure of goaf treatment. On the basis of discussion of the deformation mechanism and evolution law o...
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| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
| Published: |
Wiley
2021-01-01
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| Series: | Geofluids |
| Online Access: | http://dx.doi.org/10.1155/2021/9943596 |
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| _version_ | 1832566291898040320 |
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| author | Xueliang Li Xiaoli Guo Guang Sun |
| author_facet | Xueliang Li Xiaoli Guo Guang Sun |
| author_sort | Xueliang Li |
| collection | DOAJ |
| description | Grouting reinforcement is one of the most effective methods to enhance the stability of the goaf, and its scheme selection, hole location, and parameter determination directly affect the success or failure of goaf treatment. On the basis of discussion of the deformation mechanism and evolution law of the longwall goaf, this article comprehensively analyzed the grouting reinforcement mechanism of the goaf combined with filling theory, permeability theory, and fracturing theory and studied the physical and chemical reaction principles of two commonly used filling materials, cement-fly ash slurry and cement-clay slurry. Three grouting models have been established: whole grouting, local grouting in fracture zone, and strip grouting, and then simulated the grouting effect of the two more common methods of whole grouting and strip grouting by numerical simulation software (FLAC3D, tecplot, Surfer). Simulation analysis is carried out from the perspectives of settlement deformation, horizontal movement, vertical stress, and horizontal stress. Finally, the feasibility of grouting treatment in the goaf is verified by engineering example. The results show that a reasonable grouting scheme can effectively reduce the residual deformation of the goaf and its overlying rock and improve the poor stress state, so as to achieve the purpose of effective grouting. |
| format | Article |
| id | doaj-art-a112f5d6ced9455ab7c9b247777df858 |
| institution | Kabale University |
| issn | 1468-8115 1468-8123 |
| language | English |
| publishDate | 2021-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Geofluids |
| spelling | doaj-art-a112f5d6ced9455ab7c9b247777df8582025-02-03T01:04:37ZengWileyGeofluids1468-81151468-81232021-01-01202110.1155/2021/99435969943596Grouting Reinforcement Mechanism and Multimodel Simulation Analysis of Longwall GoafXueliang Li0Xiaoli Guo1Guang Sun2China Coal Science and Technology Ecological Environment Technology Co., Ltd., Beijing 100013, ChinaChina Coal Research Institute, Beijing 100013, ChinaChina Coal Science and Technology Ecological Environment Technology Co., Ltd., Beijing 100013, ChinaGrouting reinforcement is one of the most effective methods to enhance the stability of the goaf, and its scheme selection, hole location, and parameter determination directly affect the success or failure of goaf treatment. On the basis of discussion of the deformation mechanism and evolution law of the longwall goaf, this article comprehensively analyzed the grouting reinforcement mechanism of the goaf combined with filling theory, permeability theory, and fracturing theory and studied the physical and chemical reaction principles of two commonly used filling materials, cement-fly ash slurry and cement-clay slurry. Three grouting models have been established: whole grouting, local grouting in fracture zone, and strip grouting, and then simulated the grouting effect of the two more common methods of whole grouting and strip grouting by numerical simulation software (FLAC3D, tecplot, Surfer). Simulation analysis is carried out from the perspectives of settlement deformation, horizontal movement, vertical stress, and horizontal stress. Finally, the feasibility of grouting treatment in the goaf is verified by engineering example. The results show that a reasonable grouting scheme can effectively reduce the residual deformation of the goaf and its overlying rock and improve the poor stress state, so as to achieve the purpose of effective grouting.http://dx.doi.org/10.1155/2021/9943596 |
| spellingShingle | Xueliang Li Xiaoli Guo Guang Sun Grouting Reinforcement Mechanism and Multimodel Simulation Analysis of Longwall Goaf Geofluids |
| title | Grouting Reinforcement Mechanism and Multimodel Simulation Analysis of Longwall Goaf |
| title_full | Grouting Reinforcement Mechanism and Multimodel Simulation Analysis of Longwall Goaf |
| title_fullStr | Grouting Reinforcement Mechanism and Multimodel Simulation Analysis of Longwall Goaf |
| title_full_unstemmed | Grouting Reinforcement Mechanism and Multimodel Simulation Analysis of Longwall Goaf |
| title_short | Grouting Reinforcement Mechanism and Multimodel Simulation Analysis of Longwall Goaf |
| title_sort | grouting reinforcement mechanism and multimodel simulation analysis of longwall goaf |
| url | http://dx.doi.org/10.1155/2021/9943596 |
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