Investigation of stress-induced progressive failure of mine pillars using a Voronoi grain-based breakable block model
文献类型：期刊论文
| 作者 | Qiu, Shili1; Zhang, Shirui1,2; Jiang, Quan1; Li, Shaojun1; Zhang, Hao1; Wang, Qiankuan3 |
| 刊名 | INTERNATIONAL JOURNAL OF MINING SCIENCE AND TECHNOLOGY
 |
| 出版日期 | 2024-05-01 |
| 卷号 | 34期号:5页码:713-729 |
| 关键词 | Pillar strength FDEM Voronoi tessellation Spalling Bulking |
| ISSN号 | 2095-2686 |
| DOI | 10.1016/j.ijmst.2024.05.001 |
| 英文摘要 | The Voronoi grain-based breakable block model (VGBBM) based on the combined finite-discrete element method (FDEM) was proposed to explicitly characterize the failure mechanism and predict the deformation behavior of hard-rock mine pillars. The influence of the microscopic parameters on the macroscopic mechanical behavior was investigated using laboratory-scale models. The field-scale pillar models (width-to-height, W/H=1, 2 and 3) were calibrated based on the empirically predicted stress-strain curves of Creighton mine pillars. The results indicated that as the W/H ratios increased, the VGBBM effectively predicted the transition from strain-softening to pseudo-ductile behavior in pillars, and explicitly captured the separated rock slabs and the V-shaped damage zones on both sides of pillars and conjugate shear bands in core zones of pillars. The volumetric strain field revealed significant compressional deformation in core zones of pillars. While the peak strains of W/H=1 and 2 pillars were relatively consistent, there were significant differences in the strain energy storage and release mechanism. W/H was the primary factor influencing the deformation and strain energy in the pillar core. The friction coefficient of the structural plane was also an important factor affecting the pillar strength and the weakest discontinuity angle. The fracture surface was controlled by the discontinuity angle and the friction coefficient. This study demonstrated the capability of the VGBBM in predicting the strengths and deformation behavior of hard-rock pillars in deep mine design. (c) 2024 Published by Elsevier B.V. on behalf of China University of Mining & Technology. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/). |
| 资助项目 | National Natural Science Foundation of China[42377172] ; National Key Research and Development Plan Project of China[2023YFC2907204] |
| WOS研究方向 | Mining & Mineral Processing |
| 语种 | 英语 |
| WOS记录号 | WOS:001287874500001 |
| 出版者 | ELSEVIER |
| 源URL | [http://119.78.100.198/handle/2S6PX9GI/42239]  |
| 专题 | 中科院武汉岩土力学所 |
| 通讯作者 | Qiu, Shili; Zhang, Shirui |
| 作者单位 | 1.Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomech & Geotech Engn, Wuhan 430071, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 3.Shanghai Jiao Tong Univ, State Key Lab Ocean Engn, Shanghai 200240, Peoples R China |
| 推荐引用方式 GB/T 7714 | Qiu, Shili,Zhang, Shirui,Jiang, Quan,et al. Investigation of stress-induced progressive failure of mine pillars using a Voronoi grain-based breakable block model[J]. INTERNATIONAL JOURNAL OF MINING SCIENCE AND TECHNOLOGY,2024,34(5):713-729. |
| APA | Qiu, Shili,Zhang, Shirui,Jiang, Quan,Li, Shaojun,Zhang, Hao,&Wang, Qiankuan.(2024).Investigation of stress-induced progressive failure of mine pillars using a Voronoi grain-based breakable block model.INTERNATIONAL JOURNAL OF MINING SCIENCE AND TECHNOLOGY,34(5),713-729. |
| MLA | Qiu, Shili,et al."Investigation of stress-induced progressive failure of mine pillars using a Voronoi grain-based breakable block model".INTERNATIONAL JOURNAL OF MINING SCIENCE AND TECHNOLOGY 34.5(2024):713-729. |
入库方式： OAI收割
来源：武汉岩土力学研究所
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