The Influence of Multi-Size Basalt Fiber on Cemented Paste Backfill Mechanical Properties and Meso-Structure Characteristics
As the mine enters the deep mining stage, there is a need to enhance the compressive strength and toughness of the backfill. The objective of this study is to examine the mechanical properties of cemented tailings backfill after the incorporation of multi-size fibers and to validate the toughening m...
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| Format: | Article |
| Language: | English |
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MDPI AG
2023-09-01
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| Series: | Minerals |
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| Online Access: | https://www.mdpi.com/2075-163X/13/9/1215 |
| _version_ | 1797578688054689792 |
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| author | Xi Chen Huazhe Jiao Juanhong Liu Yixuan Yang Xinming Chen Liuhua Yang Wenxiang Zhang Tongyi Yang |
| author_facet | Xi Chen Huazhe Jiao Juanhong Liu Yixuan Yang Xinming Chen Liuhua Yang Wenxiang Zhang Tongyi Yang |
| author_sort | Xi Chen |
| collection | DOAJ |
| description | As the mine enters the deep mining stage, there is a need to enhance the compressive strength and toughness of the backfill. The objective of this study is to examine the mechanical properties of cemented tailings backfill after the incorporation of multi-size fibers and to validate the toughening mechanism of basalt fibers (BFs). To achieve this, a series of basic mechanical property tests for multi-size BFs mixing were devised, accompanied by industrial computerized tomography (CT) scanning and discrete element simulation. This study shows that the compressive strength increases and then decreases with the increase of BF dosage at a certain percentage of each size, and the splitting tensile strength gradually increases with the increase of BF dosage. The compressive strength tends to decrease and then increase, and the splitting tensile strength increases and then decreases as the fiber size ratio changes. The distribution of cemented tailings backfill and BF within the discrete element model is random. A few BF cannot play a bridging role; however, a moderate amount of BF is relatively uniformly distributed in the model to form a network structure, which generates a bond between the particles and the matrix and can effectively limit the expansion path of cracks and enhance the toughness. |
| first_indexed | 2024-03-10T22:26:19Z |
| format | Article |
| id | doaj.art-9eb27030fbb04ba2be1a318d5f79a38e |
| institution | Directory Open Access Journal |
| issn | 2075-163X |
| language | English |
| last_indexed | 2024-03-10T22:26:19Z |
| publishDate | 2023-09-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Minerals |
| spelling | doaj.art-9eb27030fbb04ba2be1a318d5f79a38e2023-11-19T12:05:57ZengMDPI AGMinerals2075-163X2023-09-01139121510.3390/min13091215The Influence of Multi-Size Basalt Fiber on Cemented Paste Backfill Mechanical Properties and Meso-Structure CharacteristicsXi Chen0Huazhe Jiao1Juanhong Liu2Yixuan Yang3Xinming Chen4Liuhua Yang5Wenxiang Zhang6Tongyi Yang7School of Civil Engineering, Henan Polytechnic University, Jiaozuo 454003, ChinaSchool of Civil Engineering, Henan Polytechnic University, Jiaozuo 454003, ChinaSchool of Civil and Resources Engineering, University of Science and Technology Beijing, Beijing 100083, ChinaSchool of Civil Engineering, Henan Polytechnic University, Jiaozuo 454003, ChinaSchool of Civil Engineering, Henan Polytechnic University, Jiaozuo 454003, ChinaSchool of Civil Engineering, Henan Polytechnic University, Jiaozuo 454003, ChinaSchool of Civil Engineering, Henan Polytechnic University, Jiaozuo 454003, ChinaSchool of Environmental and Chemical Engineering, Jiangsu University of Science and Technology, Zhenjiang 212003, ChinaAs the mine enters the deep mining stage, there is a need to enhance the compressive strength and toughness of the backfill. The objective of this study is to examine the mechanical properties of cemented tailings backfill after the incorporation of multi-size fibers and to validate the toughening mechanism of basalt fibers (BFs). To achieve this, a series of basic mechanical property tests for multi-size BFs mixing were devised, accompanied by industrial computerized tomography (CT) scanning and discrete element simulation. This study shows that the compressive strength increases and then decreases with the increase of BF dosage at a certain percentage of each size, and the splitting tensile strength gradually increases with the increase of BF dosage. The compressive strength tends to decrease and then increase, and the splitting tensile strength increases and then decreases as the fiber size ratio changes. The distribution of cemented tailings backfill and BF within the discrete element model is random. A few BF cannot play a bridging role; however, a moderate amount of BF is relatively uniformly distributed in the model to form a network structure, which generates a bond between the particles and the matrix and can effectively limit the expansion path of cracks and enhance the toughness.https://www.mdpi.com/2075-163X/13/9/1215cemented tailings backfillCT scanningmicroscopic pore structurefiber orientation distributiondiscrete element simulation |
| spellingShingle | Xi Chen Huazhe Jiao Juanhong Liu Yixuan Yang Xinming Chen Liuhua Yang Wenxiang Zhang Tongyi Yang The Influence of Multi-Size Basalt Fiber on Cemented Paste Backfill Mechanical Properties and Meso-Structure Characteristics Minerals cemented tailings backfill CT scanning microscopic pore structure fiber orientation distribution discrete element simulation |
| title | The Influence of Multi-Size Basalt Fiber on Cemented Paste Backfill Mechanical Properties and Meso-Structure Characteristics |
| title_full | The Influence of Multi-Size Basalt Fiber on Cemented Paste Backfill Mechanical Properties and Meso-Structure Characteristics |
| title_fullStr | The Influence of Multi-Size Basalt Fiber on Cemented Paste Backfill Mechanical Properties and Meso-Structure Characteristics |
| title_full_unstemmed | The Influence of Multi-Size Basalt Fiber on Cemented Paste Backfill Mechanical Properties and Meso-Structure Characteristics |
| title_short | The Influence of Multi-Size Basalt Fiber on Cemented Paste Backfill Mechanical Properties and Meso-Structure Characteristics |
| title_sort | influence of multi size basalt fiber on cemented paste backfill mechanical properties and meso structure characteristics |
| topic | cemented tailings backfill CT scanning microscopic pore structure fiber orientation distribution discrete element simulation |
| url | https://www.mdpi.com/2075-163X/13/9/1215 |
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