Experimental Study on the Evolution Law of Mesofissure in Full Tailing Cemented Backfill
To understand the mechanical properties of the backfill, to reveal the evolvement of micromechanical fissure of backfill, a uniaxial compression experiment was carried out for the full tailing cemented backfill. After loading, the microstructure of the specimens was observed by microscope and the po...
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| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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Wiley
2020-01-01
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| Series: | Advances in Materials Science and Engineering |
| Online Access: | http://dx.doi.org/10.1155/2020/8845285 |
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| author | Yufan Feng Guanghua Sun Xuejian Liang Chenyang Liu Yue Wang |
| author_facet | Yufan Feng Guanghua Sun Xuejian Liang Chenyang Liu Yue Wang |
| author_sort | Yufan Feng |
| collection | DOAJ |
| description | To understand the mechanical properties of the backfill, to reveal the evolvement of micromechanical fissure of backfill, a uniaxial compression experiment was carried out for the full tailing cemented backfill. After loading, the microstructure of the specimens was observed by microscope and the pore characteristic parameters were analyzed. The results showed that the diameter of the initial damage hole of the backfill was mostly between 0 and 40 μm, the hole diameter increases gradually with the increase of pressure, and the hole diameter reached more than 5000 μm in the postpeak damage stage. The upper structure of the backfill specimen is compact while the lower structure is relatively loose. The cracks and interfaces between tailings particles and cement paste are mechanical weak surfaces, where the cracks are mainly generated and propagated. The tip of microfractures in the backfill is damaged by the influence of stress concentration. In the failure process, both surface porosity and fracture density decrease first and then increase, and the average pore diameter increases gradually. The results have guiding significance for the study of backfill mechanical properties and goaf filling design. |
| format | Article |
| id | doaj-art-2443e69f528a48f0bd4d54a19343f7c6 |
| institution | Kabale University |
| issn | 1687-8434 1687-8442 |
| language | English |
| publishDate | 2020-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Advances in Materials Science and Engineering |
| spelling | doaj-art-2443e69f528a48f0bd4d54a19343f7c62025-02-03T01:04:29ZengWileyAdvances in Materials Science and Engineering1687-84341687-84422020-01-01202010.1155/2020/88452858845285Experimental Study on the Evolution Law of Mesofissure in Full Tailing Cemented BackfillYufan Feng0Guanghua Sun1Xuejian Liang2Chenyang Liu3Yue Wang4College of Mining Engineering, North China University of Science and Technology, Tangshan, Hebei 063210, ChinaCollege of Mining Engineering, North China University of Science and Technology, Tangshan, Hebei 063210, ChinaCollege of Mining Engineering, North China University of Science and Technology, Tangshan, Hebei 063210, ChinaCollege of Mining Engineering, North China University of Science and Technology, Tangshan, Hebei 063210, ChinaCollege of Mining Engineering, North China University of Science and Technology, Tangshan, Hebei 063210, ChinaTo understand the mechanical properties of the backfill, to reveal the evolvement of micromechanical fissure of backfill, a uniaxial compression experiment was carried out for the full tailing cemented backfill. After loading, the microstructure of the specimens was observed by microscope and the pore characteristic parameters were analyzed. The results showed that the diameter of the initial damage hole of the backfill was mostly between 0 and 40 μm, the hole diameter increases gradually with the increase of pressure, and the hole diameter reached more than 5000 μm in the postpeak damage stage. The upper structure of the backfill specimen is compact while the lower structure is relatively loose. The cracks and interfaces between tailings particles and cement paste are mechanical weak surfaces, where the cracks are mainly generated and propagated. The tip of microfractures in the backfill is damaged by the influence of stress concentration. In the failure process, both surface porosity and fracture density decrease first and then increase, and the average pore diameter increases gradually. The results have guiding significance for the study of backfill mechanical properties and goaf filling design.http://dx.doi.org/10.1155/2020/8845285 |
| spellingShingle | Yufan Feng Guanghua Sun Xuejian Liang Chenyang Liu Yue Wang Experimental Study on the Evolution Law of Mesofissure in Full Tailing Cemented Backfill Advances in Materials Science and Engineering |
| title | Experimental Study on the Evolution Law of Mesofissure in Full Tailing Cemented Backfill |
| title_full | Experimental Study on the Evolution Law of Mesofissure in Full Tailing Cemented Backfill |
| title_fullStr | Experimental Study on the Evolution Law of Mesofissure in Full Tailing Cemented Backfill |
| title_full_unstemmed | Experimental Study on the Evolution Law of Mesofissure in Full Tailing Cemented Backfill |
| title_short | Experimental Study on the Evolution Law of Mesofissure in Full Tailing Cemented Backfill |
| title_sort | experimental study on the evolution law of mesofissure in full tailing cemented backfill |
| url | http://dx.doi.org/10.1155/2020/8845285 |
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