Strength deterioration mechanism of horizontal stratified cemented tailings backfill under uniaxial compression
Horizontal stratified cemented tailings backfill (SCTB) inevitably appears in the underground stope. Exploring the mechanical characteristics of horizontal SCTBs and explaining the strength deterioration mechanism of horizontal SCTBs is essential for the strength design of backfill. In this study, e...
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Elsevier
2025-07-01
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| Series: | Case Studies in Construction Materials |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2214509524013068 |
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| author | Shuaijun Chen Aibing Jin Yiqing Zhao Zhongshu Wang Youmei Zheng |
| author_facet | Shuaijun Chen Aibing Jin Yiqing Zhao Zhongshu Wang Youmei Zheng |
| author_sort | Shuaijun Chen |
| collection | DOAJ |
| description | Horizontal stratified cemented tailings backfill (SCTB) inevitably appears in the underground stope. Exploring the mechanical characteristics of horizontal SCTBs and explaining the strength deterioration mechanism of horizontal SCTBs is essential for the strength design of backfill. In this study, experiments were used to investigate, on a macro-scale, the mechanical characteristics of horizontal SCTBs with varying filling interval time. Numerical simulations were utilized to explore the primary elements determining the strength of horizontal SCTBs from the micro-scale. The results show that, at the macro-scale, the interval time has an impact on the samples’ mechanical properties by affecting the stratified surface’s initial width. The change in the stratified surface’s initial width leads to a change in the stratified surface’s stiffness, which affects the mechanical properties of the sample. At the micro-scale, neither the stratified surface’s bonding strength nor its friction coefficient significantly affects the mechanical properties of horizontal SCTBs. The monti-form bulges with different heights reduce the stratified surface’s stiffness. Axial stress causes microcracks to form easily close to the stratified surface, destroying the sample’s integrity and reducing SCTB’s strength. The stiffness and number of stratified surfaces are the key variables impacting the mechanical properties of the horizontal SCTBs. |
| format | Article |
| id | doaj-art-95ae0dfe3fb147bc86517d88a15a2247 |
| institution | Kabale University |
| issn | 2214-5095 |
| language | English |
| publishDate | 2025-07-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Case Studies in Construction Materials |
| spelling | doaj-art-95ae0dfe3fb147bc86517d88a15a22472025-01-03T04:08:42ZengElsevierCase Studies in Construction Materials2214-50952025-07-0122e04154Strength deterioration mechanism of horizontal stratified cemented tailings backfill under uniaxial compressionShuaijun Chen0Aibing Jin1Yiqing Zhao2Zhongshu Wang3Youmei Zheng4School of Civil and Resource Engineering, University of Science and Technology Beijing, Beijing 100083, China; Key Laboratory of Ministry of Education for Efficient Mining and Safety of Metal Mines, University of Science and Technology Beijing, Beijing 100083, ChinaSchool of Civil and Resource Engineering, University of Science and Technology Beijing, Beijing 100083, China; Key Laboratory of Ministry of Education for Efficient Mining and Safety of Metal Mines, University of Science and Technology Beijing, Beijing 100083, China; Corresponding authors at: School of Civil and Resource Engineering, University of Science and Technology Beijing, Beijing 100083, China.School of Civil and Resource Engineering, University of Science and Technology Beijing, Beijing 100083, China; Key Laboratory of Ministry of Education for Efficient Mining and Safety of Metal Mines, University of Science and Technology Beijing, Beijing 100083, China; Corresponding authors at: School of Civil and Resource Engineering, University of Science and Technology Beijing, Beijing 100083, China.School of Civil and Resource Engineering, University of Science and Technology Beijing, Beijing 100083, China; Key Laboratory of Ministry of Education for Efficient Mining and Safety of Metal Mines, University of Science and Technology Beijing, Beijing 100083, ChinaSchool of Civil and Resource Engineering, University of Science and Technology Beijing, Beijing 100083, China; Key Laboratory of Ministry of Education for Efficient Mining and Safety of Metal Mines, University of Science and Technology Beijing, Beijing 100083, ChinaHorizontal stratified cemented tailings backfill (SCTB) inevitably appears in the underground stope. Exploring the mechanical characteristics of horizontal SCTBs and explaining the strength deterioration mechanism of horizontal SCTBs is essential for the strength design of backfill. In this study, experiments were used to investigate, on a macro-scale, the mechanical characteristics of horizontal SCTBs with varying filling interval time. Numerical simulations were utilized to explore the primary elements determining the strength of horizontal SCTBs from the micro-scale. The results show that, at the macro-scale, the interval time has an impact on the samples’ mechanical properties by affecting the stratified surface’s initial width. The change in the stratified surface’s initial width leads to a change in the stratified surface’s stiffness, which affects the mechanical properties of the sample. At the micro-scale, neither the stratified surface’s bonding strength nor its friction coefficient significantly affects the mechanical properties of horizontal SCTBs. The monti-form bulges with different heights reduce the stratified surface’s stiffness. Axial stress causes microcracks to form easily close to the stratified surface, destroying the sample’s integrity and reducing SCTB’s strength. The stiffness and number of stratified surfaces are the key variables impacting the mechanical properties of the horizontal SCTBs.http://www.sciencedirect.com/science/article/pii/S2214509524013068Cemented tailings backfillHorizontal stratified surfaceParticle flow codeInfluencing factorsStrength mechanism deterioration |
| spellingShingle | Shuaijun Chen Aibing Jin Yiqing Zhao Zhongshu Wang Youmei Zheng Strength deterioration mechanism of horizontal stratified cemented tailings backfill under uniaxial compression Case Studies in Construction Materials Cemented tailings backfill Horizontal stratified surface Particle flow code Influencing factors Strength mechanism deterioration |
| title | Strength deterioration mechanism of horizontal stratified cemented tailings backfill under uniaxial compression |
| title_full | Strength deterioration mechanism of horizontal stratified cemented tailings backfill under uniaxial compression |
| title_fullStr | Strength deterioration mechanism of horizontal stratified cemented tailings backfill under uniaxial compression |
| title_full_unstemmed | Strength deterioration mechanism of horizontal stratified cemented tailings backfill under uniaxial compression |
| title_short | Strength deterioration mechanism of horizontal stratified cemented tailings backfill under uniaxial compression |
| title_sort | strength deterioration mechanism of horizontal stratified cemented tailings backfill under uniaxial compression |
| topic | Cemented tailings backfill Horizontal stratified surface Particle flow code Influencing factors Strength mechanism deterioration |
| url | http://www.sciencedirect.com/science/article/pii/S2214509524013068 |
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