Study of the spatial strength distribution patterns and microstructure characteristics of ultra-fine tailings cemented paste backfill
Abstract In this study, the spatial distribution of the mechanical strength of ultra-fine tailings cemented paste backfill (UCPB) in underground stopes was examined, and the micro-mechanism responsible for differences in spatial strength performance via changes in particle deposition was elucidated....
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| Format: | Article |
| Language: | English |
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Nature Portfolio
2025-01-01
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| Series: | Scientific Reports |
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| Online Access: | https://doi.org/10.1038/s41598-024-83816-3 |
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| author | Yuye Tan Yiding Li Xin Yu Yuchao Deng Zepu Song Yunpeng Kou |
| author_facet | Yuye Tan Yiding Li Xin Yu Yuchao Deng Zepu Song Yunpeng Kou |
| author_sort | Yuye Tan |
| collection | DOAJ |
| description | Abstract In this study, the spatial distribution of the mechanical strength of ultra-fine tailings cemented paste backfill (UCPB) in underground stopes was examined, and the micro-mechanism responsible for differences in spatial strength performance via changes in particle deposition was elucidated. To better understand this phenomenon, we constructed a similar backfilling stope model using the ultra-fine tailings of a gold mine. We manufactured specimens at different spatial locations and conducted a novel series of tests, including uniaxial compressive strength, shear strength, and conventional triaxial tests, to obtain the strength parameters in different spatial distributions. The strength parameters for the different UCPB locations in this model were revealed and examined along with the original pore and particle size distributions. Computer tomography (CT) and scanning electron microscopy (SEM) observations before and after the UCPB failed revealed that the particle deposition effect at different positions was the primary cause of the size effect. The strength distribution pattern demonstrated that the UCPB material has an apparent spatial effect. Consequently, considering the position relationship between the stope and filling mouth is crucial when designing the strength of adjacent mining rooms. This research may guide both backfill study and design. |
| format | Article |
| id | doaj-art-7e4fa663131648e7b6c82da140164639 |
| institution | Kabale University |
| issn | 2045-2322 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | Nature Portfolio |
| record_format | Article |
| series | Scientific Reports |
| spelling | doaj-art-7e4fa663131648e7b6c82da1401646392025-01-05T12:17:27ZengNature PortfolioScientific Reports2045-23222025-01-0115111710.1038/s41598-024-83816-3Study of the spatial strength distribution patterns and microstructure characteristics of ultra-fine tailings cemented paste backfillYuye Tan0Yiding Li1Xin Yu2Yuchao Deng3Zepu Song4Yunpeng Kou5State Key Laboratory of High-Efficient Mining and Safety of Metal Mines of Ministry of Education, University of Science and Technology BeijingState Key Laboratory of High-Efficient Mining and Safety of Metal Mines of Ministry of Education, University of Science and Technology BeijingState Key Laboratory of Lithospheric and Environmental Coevolution, Institute of Geology and Geophysics, Chinese Academy of SciencesState Key Laboratory of High-Efficient Mining and Safety of Metal Mines of Ministry of Education, University of Science and Technology BeijingBackfilling Engineering Laboratory Branch of Shandong Gold Mining Science and Technology Co., LtdState Key Laboratory of High-Efficient Mining and Safety of Metal Mines of Ministry of Education, University of Science and Technology BeijingAbstract In this study, the spatial distribution of the mechanical strength of ultra-fine tailings cemented paste backfill (UCPB) in underground stopes was examined, and the micro-mechanism responsible for differences in spatial strength performance via changes in particle deposition was elucidated. To better understand this phenomenon, we constructed a similar backfilling stope model using the ultra-fine tailings of a gold mine. We manufactured specimens at different spatial locations and conducted a novel series of tests, including uniaxial compressive strength, shear strength, and conventional triaxial tests, to obtain the strength parameters in different spatial distributions. The strength parameters for the different UCPB locations in this model were revealed and examined along with the original pore and particle size distributions. Computer tomography (CT) and scanning electron microscopy (SEM) observations before and after the UCPB failed revealed that the particle deposition effect at different positions was the primary cause of the size effect. The strength distribution pattern demonstrated that the UCPB material has an apparent spatial effect. Consequently, considering the position relationship between the stope and filling mouth is crucial when designing the strength of adjacent mining rooms. This research may guide both backfill study and design.https://doi.org/10.1038/s41598-024-83816-3Ultra-fine tailings cemented paste backfillSimilar stope modelSpatial strength distributionElectron microscopic scanning |
| spellingShingle | Yuye Tan Yiding Li Xin Yu Yuchao Deng Zepu Song Yunpeng Kou Study of the spatial strength distribution patterns and microstructure characteristics of ultra-fine tailings cemented paste backfill Scientific Reports Ultra-fine tailings cemented paste backfill Similar stope model Spatial strength distribution Electron microscopic scanning |
| title | Study of the spatial strength distribution patterns and microstructure characteristics of ultra-fine tailings cemented paste backfill |
| title_full | Study of the spatial strength distribution patterns and microstructure characteristics of ultra-fine tailings cemented paste backfill |
| title_fullStr | Study of the spatial strength distribution patterns and microstructure characteristics of ultra-fine tailings cemented paste backfill |
| title_full_unstemmed | Study of the spatial strength distribution patterns and microstructure characteristics of ultra-fine tailings cemented paste backfill |
| title_short | Study of the spatial strength distribution patterns and microstructure characteristics of ultra-fine tailings cemented paste backfill |
| title_sort | study of the spatial strength distribution patterns and microstructure characteristics of ultra fine tailings cemented paste backfill |
| topic | Ultra-fine tailings cemented paste backfill Similar stope model Spatial strength distribution Electron microscopic scanning |
| url | https://doi.org/10.1038/s41598-024-83816-3 |
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