Effect of fully-grouted bolts on the failure behaviors of mine pillars: Insights from block-based FDEM modeling
文献类型：期刊论文
| 作者 | Zhang, Shirui1,2; Qiu, Shili2; Jiang, Quan2; Jia, Lexin1,2; Li, Shaojun2; Xie, Zhenkun1,2 |
| 刊名 | CONSTRUCTION AND BUILDING MATERIALS
 |
| 出版日期 | 2024-03-15 |
| 卷号 | 419页码:10 |
| 关键词 | Hard -rock pillar FDEM Voronoi tessellation Fully -grouted bolt Reinforcement effect |
| ISSN号 | 0950-0618 |
| DOI | 10.1016/j.conbuildmat.2024.135468 |
| 英文摘要 | In this study, the Voronoi-based breakable block model (VBBM) based on the combined finite-discrete element method (FDEM) is used to investigate the failure mechanism of mine pillars and the rock-rockbolt interactions. The mechanical parameters of grout-rock and grout-bolt interfaces of a fully-grouted bolt are calibrated via numerical pull-out tests. Then, uniaxial compression tests are carried out on the reinforced pillars. The kinetic energy release rate (KERR) and crack aperture (CA) are used to evaluate the reinforcement effect. The results revealed that the VBBM can effectively characterize the damage failure mechanisms of spalling on the pillar surface and conjugate shear failure in the core zone of the pillar and reproduce the pre-peak nonlinear deformation and post-peak pseudo-ductile behaviors. The passive confining pressure generated by rockbolts is activated only when the rock mass produces sufficient deformation, and the constraints generated by different numbers of rockbolts can only affect the post-peak behavior of the pillar. There is a gradient feature in the internal deformation of the pillar from the shallow surface to the core. If the rockbolt density meets the strain demand, then rockbolts can delay the inward expansion of cracks by generating local constraints and can effectively fix the spalling rock blocks. With increasing support pressure, the CA and KERR exhibit a decreasing trend and strong power-exponential relationships with support pressure, indicating that there is a transition interval of support pressure and an optimal value for setting the rockbolt density. |
| 资助项目 | National key research and development plan project of China[2023YFC2907204] ; National Natural Science Foundation of China[42377172] ; National Natural Science Foundation of China[52325905] |
| WOS研究方向 | Construction & Building Technology ; Engineering ; Materials Science |
| 语种 | 英语 |
| WOS记录号 | WOS:001193874600001 |
| 出版者 | ELSEVIER SCI LTD |
| 源URL | [http://119.78.100.198/handle/2S6PX9GI/40910]  |
| 专题 | 中科院武汉岩土力学所 |
| 通讯作者 | Qiu, Shili |
| 作者单位 | 1.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 2.Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomech & Geotech Engn, Wuhan 430071, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zhang, Shirui,Qiu, Shili,Jiang, Quan,et al. Effect of fully-grouted bolts on the failure behaviors of mine pillars: Insights from block-based FDEM modeling[J]. CONSTRUCTION AND BUILDING MATERIALS,2024,419:10. |
| APA | Zhang, Shirui,Qiu, Shili,Jiang, Quan,Jia, Lexin,Li, Shaojun,&Xie, Zhenkun.(2024).Effect of fully-grouted bolts on the failure behaviors of mine pillars: Insights from block-based FDEM modeling.CONSTRUCTION AND BUILDING MATERIALS,419,10. |
| MLA | Zhang, Shirui,et al."Effect of fully-grouted bolts on the failure behaviors of mine pillars: Insights from block-based FDEM modeling".CONSTRUCTION AND BUILDING MATERIALS 419(2024):10. |
入库方式： OAI收割
来源：武汉岩土力学研究所
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