Numerical analysis of hard rock blasting unloading effects in high in situ stress fields
文献类型：期刊论文
| 作者 | Xiao, Si-You1,2,3 ; Su, Li-Jun1,3,4; Jiang, Yuan-Jun1,3,4; Liu, Zhi-Xiang2
|
| 刊名 | BULLETIN OF ENGINEERING GEOLOGY AND THE ENVIRONMENT
 |
| 出版日期 | 2019-03-01 |
| 卷号 | 78期号:2页码:867-875 |
| 关键词 | Blasting High in situ stress Coupled statics and dynamics Dynamic unloading Explicit-implicit algorithm |
| ISSN号 | 1435-9529 |
| DOI | 10.1007/s10064-017-1067-7 |
| 通讯作者 | Jiang, Yuan-Jun(yuanjun.jiang.civil@gmail.com) |
| 英文摘要 | Blasting in high in situ stress fields is different from blasting at the earth's surface because of the dynamic unloading effect in the former. In order to study the coupling of dynamic loading and dynamic unloading in the blasting process, the explicit finite element method and explicit-implicit finite element method are employed respectively to investigate the influence of high stress on blasting effects. The results show that the stress and strain change rules of the two methods are clearly different. The stress and strain change rates calculated by the explicit-implicit algorithm simulation are greater than the results simulated by the explicit finite algorithm. The radius of the blasting cavity calculated by the explicit-implicit finite element method is 0.015 m larger than that of the explicit finite element method. Based on the results of the explicit finite element method, a theoretical model is also established, which helps to clarify the effects of high in situ stress unloading when blasting in a high in situ stress field. The model shows that the maximum tensile radial displacement caused by high in situ stress dynamic unloading at the edge of the blasting cavity is 0.12 mm, and the dynamic unloading radial tensile effect can lead to rock failure. This research illustrates that high stress has a considerable influence on the blasting process and on rock-breaking effects. According to the findings, certain blasting engineering design suggestions are made. |
| WOS关键词 | EXCAVATION ; RELEASE ; SIMULATION ; TUNNEL ; DAMAGE ; PATH |
| 资助项目 | National Natural Science Foundation of China[41502334] ; 973 Program of China[51278397] |
| WOS研究方向 | Engineering ; Geology |
| 语种 | 英语 |
| WOS记录号 | WOS:000460046500014 |
| 出版者 | SPRINGER HEIDELBERG |
| 资助机构 | National Natural Science Foundation of China ; 973 Program of China |
| 源URL | [http://ir.imde.ac.cn/handle/131551/25312]  |
| 专题 | 成都山地灾害与环境研究所_山地灾害与地表过程重点实验室 |
| 通讯作者 | Jiang, Yuan-Jun |
| 作者单位 | 1.Chinese Acad Sci, Key Lab Mt Hazards & Land Surface Proc, Chengdu 610041, Sichuan, Peoples R China 2.Cent S Univ, Sch Resources & Safety Engn, Changsha 410083, Hunan, Peoples R China 3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 4.Chinese Acad Sci, Inst Mt Hazards & Environm, Chengdu 610041, Sichuan, Peoples R China |
| 推荐引用方式 GB/T 7714 | Xiao, Si-You,Su, Li-Jun,Jiang, Yuan-Jun,et al. Numerical analysis of hard rock blasting unloading effects in high in situ stress fields[J]. BULLETIN OF ENGINEERING GEOLOGY AND THE ENVIRONMENT,2019,78(2):867-875. |
| APA | Xiao, Si-You,Su, Li-Jun,Jiang, Yuan-Jun,&Liu, Zhi-Xiang.(2019).Numerical analysis of hard rock blasting unloading effects in high in situ stress fields.BULLETIN OF ENGINEERING GEOLOGY AND THE ENVIRONMENT,78(2),867-875. |
| MLA | Xiao, Si-You,et al."Numerical analysis of hard rock blasting unloading effects in high in situ stress fields".BULLETIN OF ENGINEERING GEOLOGY AND THE ENVIRONMENT 78.2(2019):867-875. |
入库方式： OAI收割
来源：成都山地灾害与环境研究所
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。