Study on the suspending mechanism of gangue particle in coal-based solid waste slurry
In China's coal mine backfill mining projects, certain mines demonstrate an extensive filling distance that exceeds 3000 m. However, there are few researches concerning the theoretical underpinnings for slurry long-distance pipeline transportation. Gangue particles suspending in filling slurry...
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| Format: | Article |
| Language: | English |
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Elsevier
2024-11-01
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| Series: | Alexandria Engineering Journal |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S1110016824008299 |
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| author | Tao Li Xuexi Chen Zijian Liu Wei Jiang Heng Min |
| author_facet | Tao Li Xuexi Chen Zijian Liu Wei Jiang Heng Min |
| author_sort | Tao Li |
| collection | DOAJ |
| description | In China's coal mine backfill mining projects, certain mines demonstrate an extensive filling distance that exceeds 3000 m. However, there are few researches concerning the theoretical underpinnings for slurry long-distance pipeline transportation. Gangue particles suspending in filling slurry is the prerequisite for successful long-distance pipeline transportation. This paper conducts theoretical researches on the heightened sensitivity issue of particle settling within coal-based solid waste filling slurry (CSWFS) for long-distance pipeline transportation, which can easily lead to unstable slurry concentration then pipe blockage or bursting accidents. The mechanical model for particle settling and critical non-settling particle diameter for long-distance pipeline transportation are developed based on the ''solid-liquid two-phase carrier suspension fluid'', and reveal the intrinsical mechanism of particle settling within CSWFS for long-distance pipeline transportation. Through the calculation of the mechanical model for critical non-settling particle diameter and particle settling, coupled with the particle diameter screening experiment, the value of critical non-settling particle diameter is determined to be 0.0067 m, and the density of solid-liquid two-phase carrier suspension fluid is 1712.37 kg/m3. The CSWFS is classified as a semi-stable slurry, lacking time-dependent suspending state required for long-distance pipeline transportation, which could lead to pipe blockage accidents. Further research into effective methods is urgently required to ensure adequate safety and adaptability for long-distance pipeline transportation of CSWFS. |
| format | Article |
| id | doaj-art-30c1ff7fc0514b609d03918573106aa0 |
| institution | Kabale University |
| issn | 1110-0168 |
| language | English |
| publishDate | 2024-11-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Alexandria Engineering Journal |
| spelling | doaj-art-30c1ff7fc0514b609d03918573106aa02024-11-15T06:11:16ZengElsevierAlexandria Engineering Journal1110-01682024-11-01107583590Study on the suspending mechanism of gangue particle in coal-based solid waste slurryTao Li0Xuexi Chen1Zijian Liu2Wei Jiang3Heng Min4School of Mine Safety, North China Institute of Science and Technology, Sanhe 065201, China; Key Laboratory of Mine Filling and Safe Mining of National Mine Safety Administration, North China Institute of Science and Technology, Sanhe 065201, ChinaSchool of Mine Safety, North China Institute of Science and Technology, Sanhe 065201, China; Corresponding author.School of Mine Safety, North China Institute of Science and Technology, Sanhe 065201, ChinaSchool of Mine Safety, North China Institute of Science and Technology, Sanhe 065201, ChinaSchool of Mine Safety, North China Institute of Science and Technology, Sanhe 065201, ChinaIn China's coal mine backfill mining projects, certain mines demonstrate an extensive filling distance that exceeds 3000 m. However, there are few researches concerning the theoretical underpinnings for slurry long-distance pipeline transportation. Gangue particles suspending in filling slurry is the prerequisite for successful long-distance pipeline transportation. This paper conducts theoretical researches on the heightened sensitivity issue of particle settling within coal-based solid waste filling slurry (CSWFS) for long-distance pipeline transportation, which can easily lead to unstable slurry concentration then pipe blockage or bursting accidents. The mechanical model for particle settling and critical non-settling particle diameter for long-distance pipeline transportation are developed based on the ''solid-liquid two-phase carrier suspension fluid'', and reveal the intrinsical mechanism of particle settling within CSWFS for long-distance pipeline transportation. Through the calculation of the mechanical model for critical non-settling particle diameter and particle settling, coupled with the particle diameter screening experiment, the value of critical non-settling particle diameter is determined to be 0.0067 m, and the density of solid-liquid two-phase carrier suspension fluid is 1712.37 kg/m3. The CSWFS is classified as a semi-stable slurry, lacking time-dependent suspending state required for long-distance pipeline transportation, which could lead to pipe blockage accidents. Further research into effective methods is urgently required to ensure adequate safety and adaptability for long-distance pipeline transportation of CSWFS.http://www.sciencedirect.com/science/article/pii/S1110016824008299Backfill miningSettling mechanical modelCritical non-settling particle diameterSuspending mechanismSlurry stability |
| spellingShingle | Tao Li Xuexi Chen Zijian Liu Wei Jiang Heng Min Study on the suspending mechanism of gangue particle in coal-based solid waste slurry Alexandria Engineering Journal Backfill mining Settling mechanical model Critical non-settling particle diameter Suspending mechanism Slurry stability |
| title | Study on the suspending mechanism of gangue particle in coal-based solid waste slurry |
| title_full | Study on the suspending mechanism of gangue particle in coal-based solid waste slurry |
| title_fullStr | Study on the suspending mechanism of gangue particle in coal-based solid waste slurry |
| title_full_unstemmed | Study on the suspending mechanism of gangue particle in coal-based solid waste slurry |
| title_short | Study on the suspending mechanism of gangue particle in coal-based solid waste slurry |
| title_sort | study on the suspending mechanism of gangue particle in coal based solid waste slurry |
| topic | Backfill mining Settling mechanical model Critical non-settling particle diameter Suspending mechanism Slurry stability |
| url | http://www.sciencedirect.com/science/article/pii/S1110016824008299 |
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