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Numerical analysis of hard rock blasting unloading effects in high in-situ stress fields
Xiao SY(肖思友)1; Jiang YJ(姜元俊)1; Su LJ(苏立君)1; Liu ZX(刘志祥)2
Corresponding Author姜元俊
2017
Source Publicationbulletin of engineering geology and the environment
ISSN1435-9529
Issue6Pages:1-9
Abstract
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 explicitimplicit 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.
KeywordBlastIng . High In Situ Stress . Coupled Statics And Dynamics . Dynamic unloadIng . Explicit-implicit Algorithm
DOI10.1007/s10064-017-1067-7
URL查看原文
Language英语
Citation statistics
Cited Times:6[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imde.ac.cn/handle/131551/20760
Collection山地灾害与地表过程重点实验室
Affiliation1.中国科学院水利部成都山地灾害与环境研究所
2.中南大学
First Author Affilication中国科学院水利部成都山地灾害与环境研究所
Recommended Citation
GB/T 7714
Xiao SY,Jiang YJ,Su LJ,et al. Numerical analysis of hard rock blasting unloading effects in high in-situ stress fields[J]. bulletin of engineering geology and the environment,2017(6):1-9.
APA Xiao SY,Jiang YJ,Su LJ,&Liu ZX.(2017).Numerical analysis of hard rock blasting unloading effects in high in-situ stress fields.bulletin of engineering geology and the environment(6),1-9.
MLA Xiao SY,et al."Numerical analysis of hard rock blasting unloading effects in high in-situ stress fields".bulletin of engineering geology and the environment .6(2017):1-9.
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