| NPR锚杆/索围岩动力响应数值模拟分析 |
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| 引用本文： | 郭隆基,何满潮,瞿定军,陶志刚. NPR锚杆/索围岩动力响应数值模拟分析[J]. 东北大学学报(自然科学版), 2022, 43(8): 1159-1167. DOI: 10.12068/j.issn.1005-3026.2022.08.013 |
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| 作者姓名： | 郭隆基 何满潮 瞿定军 陶志刚 |
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| 作者单位： | (1. 中国矿业大学(北京) 深部岩土力学与地下工程国家重点实验室， 北京100083； 2. 中国矿业大学(北京) 力学与建筑工程学院， 北京100083； 3. 远安县燎原矿业有限责任公司， 湖北 宜昌444200) |
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| 基金项目： | 国家自然科学基金资助项目(41941018). |
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| 摘 要： | 为了解决深部开采造成的冲击地压、大变形和常规锚杆/索破断失效等问题，本文以某煤矿釆区为研究试验段，基于高地应力软岩大变形破坏机理，采用FLAC3D-PFC3D耦合建模方法首次开展NPR锚杆/索动力学数值模拟研究，建立PR和NPR锚杆/索两种支护方案的数值模型，对比分析动荷载下硐室围岩以及锚杆的受力、位移情况.结果表明:25MPa冲击荷载下，25根PR支护锚杆/索中21根已失效，围岩大面积失稳，耦合墙出现严重变形，硐室呈现内凸弧形变形破坏.而相同条件下，NPR锚杆/索均未失效，硐室围岩稳定性保持良好.
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| 关 键 词： | 冲击地压；NPR锚杆/索；围岩支护；FLAC3D；硐室稳定性 |
| 修稿时间： | 2021-06-12 |
Numerical Simulation of Dynamic Response of Surrounding Rock Anchored by NPR Bolt/Cable |
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| GUO Long-ji,HE Man-chao,QU Ding-jun,TAO Zhi-gang. Numerical Simulation of Dynamic Response of Surrounding Rock Anchored by NPR Bolt/Cable[J]. Journal of Northeastern University(Natural Science), 2022, 43(8): 1159-1167. DOI: 10.12068/j.issn.1005-3026.2022.08.013 |
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| Authors: | GUO Long-ji HE Man-chao QU Ding-jun TAO Zhi-gang |
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| Affiliation: | 1. State Key Laboratory for Geomechanics and Deep Underground Engineering， China University of Mining and Technology |
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| Abstract: | In this paper， a coal mine is used as the research region to study the problems caused by deep mining， such as rock burst， large deformation and failure of conventional bolt/cable. Based on the large deformation failure mechanism of high in-situ stress soft rock， the FLAC3D-PFC3D coupling modeling method was used to carry out the dynamic numerical simulation study of NPR (negative Poisson’s ratio) bolt/cable for the first time. Numerical models of two support schemes of PR and NPR bolt/cable were established， and the stress and displacement of the surrounding rock of the chamber and the bolt/cable under dynamic loads were compared and analyzed. The results show that under the impact load of 25MPa， 21 of the 25 PR support bolts/cables failed， the surrounding rock was damaged in a large area， the coupling wall was severely deformed， and the chamber presented inner convex arc-shaped deformation and failure. Under the same conditions， none of the NPR bolts/cables failed， and the stability of the surrounding rock of the chamber remained good. |
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| Keywords: | rock burst NPR bolt/cable surrounding rock support FLAC3D chamber stability, |
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