Study on the Diffusion Law of Fluidized Filling Gangue Slurry in Goaf of Coal Mine Underground
In response to the challenge posed by the limited capacity of postmining paste and original waste filling mining technology for small-scale waste rock treatment, which is incompatible with the requirements of modern high-yield mines producing millions of tons, fluidized filling mining technology in...
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| Format: | Article |
| Language: | English |
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Wiley
2024-01-01
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| Series: | Geofluids |
| Online Access: | http://dx.doi.org/10.1155/2024/9925765 |
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| author | Baoning Wei Qingxiang Huang Dengdeng Zhuang Xin Cao Bo Hui Xiao Zuo Mengbo Zhu |
| author_facet | Baoning Wei Qingxiang Huang Dengdeng Zhuang Xin Cao Bo Hui Xiao Zuo Mengbo Zhu |
| author_sort | Baoning Wei |
| collection | DOAJ |
| description | In response to the challenge posed by the limited capacity of postmining paste and original waste filling mining technology for small-scale waste rock treatment, which is incompatible with the requirements of modern high-yield mines producing millions of tons, fluidized filling mining technology in goaf presents a sustainable and environmentally friendly solution. This innovative method effectively addresses the balance between mining and filling operations while enabling large-scale waste rock management in coal mines. This article presents a model for predicting the spatial morphology of goaf and employs theoretical calculations to determine the residual space left after goaf caving. It unveils the fluidization filling approach for goaf caving, utilizing a “high- and low-level collaborative filling” strategy and taking advantage of various types of residual spaces within cavities and voids. Experimental investigations into gangue slurry diffusion in the goaf reveal insights into its diffusion patterns along three directions: horizontal, inclined, and vertical. The analysis also establishes correlations between porosity, space utilization rate, and the Talbol index. Furthermore, the research identifies the flow characteristics of fluidized filling slurry as consistent with the Bingham fluid behavior. A calculation formula for determining the diffusion radius of the filling slurry within cracks is provided. The study highlights four distinct flow stages in the process: stable laminar diffusion, transition from advection to turbulence, turbulence, and stoppage. To validate these findings, COMSOL simulation software is employed to simulate and analyze the diffusion patterns of gangue slurry within the goaf. The research outcomes offer valuable theoretical insights into the postgangue fluidization goaf filling technology and serve as a technical reference for the design of coal-based solid waste fluidization filling processes. |
| format | Article |
| id | doaj-art-bd56b91cc708429a8ba252e7b749c516 |
| institution | Kabale University |
| issn | 1468-8123 |
| language | English |
| publishDate | 2024-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Geofluids |
| spelling | doaj-art-bd56b91cc708429a8ba252e7b749c5162025-02-03T07:23:45ZengWileyGeofluids1468-81232024-01-01202410.1155/2024/9925765Study on the Diffusion Law of Fluidized Filling Gangue Slurry in Goaf of Coal Mine UndergroundBaoning Wei0Qingxiang Huang1Dengdeng Zhuang2Xin Cao3Bo Hui4Xiao Zuo5Mengbo Zhu6College of Energy EngineeringCollege of Energy EngineeringCollege of Energy EngineeringShaanxi Coal and Chemical Industry Technology Research Institute Co., Ltd.Shaanxi Coal and Chemical Industry Technology Research Institute Co., Ltd.Shaanxi Coal and Chemical Industry Technology Research Institute Co., Ltd.College of Energy EngineeringIn response to the challenge posed by the limited capacity of postmining paste and original waste filling mining technology for small-scale waste rock treatment, which is incompatible with the requirements of modern high-yield mines producing millions of tons, fluidized filling mining technology in goaf presents a sustainable and environmentally friendly solution. This innovative method effectively addresses the balance between mining and filling operations while enabling large-scale waste rock management in coal mines. This article presents a model for predicting the spatial morphology of goaf and employs theoretical calculations to determine the residual space left after goaf caving. It unveils the fluidization filling approach for goaf caving, utilizing a “high- and low-level collaborative filling” strategy and taking advantage of various types of residual spaces within cavities and voids. Experimental investigations into gangue slurry diffusion in the goaf reveal insights into its diffusion patterns along three directions: horizontal, inclined, and vertical. The analysis also establishes correlations between porosity, space utilization rate, and the Talbol index. Furthermore, the research identifies the flow characteristics of fluidized filling slurry as consistent with the Bingham fluid behavior. A calculation formula for determining the diffusion radius of the filling slurry within cracks is provided. The study highlights four distinct flow stages in the process: stable laminar diffusion, transition from advection to turbulence, turbulence, and stoppage. To validate these findings, COMSOL simulation software is employed to simulate and analyze the diffusion patterns of gangue slurry within the goaf. The research outcomes offer valuable theoretical insights into the postgangue fluidization goaf filling technology and serve as a technical reference for the design of coal-based solid waste fluidization filling processes.http://dx.doi.org/10.1155/2024/9925765 |
| spellingShingle | Baoning Wei Qingxiang Huang Dengdeng Zhuang Xin Cao Bo Hui Xiao Zuo Mengbo Zhu Study on the Diffusion Law of Fluidized Filling Gangue Slurry in Goaf of Coal Mine Underground Geofluids |
| title | Study on the Diffusion Law of Fluidized Filling Gangue Slurry in Goaf of Coal Mine Underground |
| title_full | Study on the Diffusion Law of Fluidized Filling Gangue Slurry in Goaf of Coal Mine Underground |
| title_fullStr | Study on the Diffusion Law of Fluidized Filling Gangue Slurry in Goaf of Coal Mine Underground |
| title_full_unstemmed | Study on the Diffusion Law of Fluidized Filling Gangue Slurry in Goaf of Coal Mine Underground |
| title_short | Study on the Diffusion Law of Fluidized Filling Gangue Slurry in Goaf of Coal Mine Underground |
| title_sort | study on the diffusion law of fluidized filling gangue slurry in goaf of coal mine underground |
| url | http://dx.doi.org/10.1155/2024/9925765 |
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