Strainburst characteristics under bolt support conditions: an experimental study
文献类型：期刊论文
| 作者 | Hu, Xiaochuan; Su, Guoshao; Chen, Kang; Li, Tianbin; Jiang, Quan |
| 刊名 | NATURAL HAZARDS
 |
| 出版日期 | 2019 |
| 卷号 | 97期号:2页码:913-933 |
| 关键词 | Rockburst Strainburst Bolt support True-triaxial tests |
| ISSN号 | 0921-030X |
| DOI | 10.1007/s11069-019-03682-5 |
| 英文摘要 | Strainburst, defined as a burst that occurs on the periphery of tunnels, is always associated with intact and hard brittle rocks and high geo-stress. In practical engineering, the prevention of strainburst by bolting does not achieve the desired effects. Deep insight into the strainburst process and mechanisms under bolt support conditions is necessary to ensure safe underground construction. In this study, strainburst characteristics under bolt support conditions were investigated using a true-triaxial rockburst testing system, which was equipped with an acoustic emission monitoring system. High-speed cameras were also used to capture the ejection failure process. Two indicators, namely kinetic energy and maximum decibel, were used to comprehensively evaluate the rockburst intensity. In addition, characteristic stresses, failure mode and cracking mechanisms under different bolt spacing conditions were investigated. The test results demonstrated that rockburst is greatly affected by the bolt arrangement. Rockburst changes from the way occurring in the form of a local failure in weak area to the way striking the bolt position and even the overall free face with the decrease in bolt spacing. The use of the bolt increases the rockburst intensity, but the intensity decreases as the bolt spacing decreases. Characteristic stresses including crack initiation stress, crack damage stress and peak strength increase monotonously with the use of bolt and the decreasing bolt spacing. During the strainburst, tensile failure dominates the cracking process regardless of bolt spacing; however, with the use of bolt and decrease in bolt spacing, tensile splitting near the free face become less obvious and the proportion of shear failure gradually increased. |
| WOS研究方向 | Geology ; Meteorology & Atmospheric Sciences ; Water Resources |
| 语种 | 英语 |
| WOS记录号 | WOS:000482068400021 |
| 源URL | [http://119.78.100.198/handle/2S6PX9GI/14967]  |
| 专题 | 岩土力学所知识全产出_期刊论文 国家重点实验室知识产出_期刊论文 |
| 作者单位 | 1.Guangxi Univ, Sch Civil & Architecture Engn, Key Lab Disaster Prevent & Struct Safety, Minist Educ, Nanning 530004, Peoples R China; 2.State Key Lab Geohazard Prevent & Geoenvironm Pro, Chengdu 610059, Sichuan, Peoples R China; 3.Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomech & Geotech Engn, Wuhan 430071, Hubei, Peoples R China |
| 推荐引用方式 GB/T 7714 | Hu, Xiaochuan,Su, Guoshao,Chen, Kang,et al. Strainburst characteristics under bolt support conditions: an experimental study[J]. NATURAL HAZARDS,2019,97(2):913-933. |
| APA | Hu, Xiaochuan,Su, Guoshao,Chen, Kang,Li, Tianbin,&Jiang, Quan.(2019).Strainburst characteristics under bolt support conditions: an experimental study.NATURAL HAZARDS,97(2),913-933. |
| MLA | Hu, Xiaochuan,et al."Strainburst characteristics under bolt support conditions: an experimental study".NATURAL HAZARDS 97.2(2019):913-933. |
入库方式： OAI收割
来源：武汉岩土力学研究所
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