| Study on the Guiding Mechanism of Multiple and Empty Holes Under Explosion Load | |
Cao, Ruyang1; Li, Yunpeng1; Feng C(冯春)2,3 ; Zhang, Yiming1
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| Corresponding Author | Li, Yunpeng([email protected]) |
| Source Publication | MINING METALLURGY & EXPLORATION
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| 2023-12-19 | |
| Pages | 10 |
| ISSN | 2524-3462 |
| Abstract | In the past, the selection of the number of empty holes between blast holes heavily relied on the subjective experience of practitioners, leading to unsatisfactory blasting results. The number of empty holes between blast holes is particularly important for the perforation of explosive cracks. In order to determine the optimum number of empty holes for inducing the propagation of explosive cracks, a two-dimensional numerical model of two-hole blasting was established based on the continuous-discontinuous element method (CDEM) using polymethyl methacrylate (PMMA) as the medium, and numerical simulation of various working conditions was conducted; the simulation results are basically consistent with the PMMA model test. Through the analysis of blasting parameters, the optimal number of empty holes with a certain hole spacing is fitted. The following conclusions are drawn: (1) There is a threshold for variable x. When x exceeds 50, the presence of empty holes cannot lead to the perforation of explosive cracks between the blast holes. (2) When x is below 50, the optimal number of empty holes inducing the propagation of explosive cracks can be determined through fitting an empirical formula. By adjusting the number of empty holes between blast holes, a significant spacing between adjacent blast holes was achieved, allowing for effective penetration, so as to effectively "induce" the direction of the fracture zone and make full use of the energy of explosives. The research results of this paper are conducive to the research of directional blasting technology and provide certain references for the optimization of precision blasting parameters. |
| Keyword | Induced hole CDEM Crack propagation Double hole blasting Precise blasting |
| DOI | 10.1007/s42461-023-00902-2 |
| Indexed By | SCI ; EI |
| Language | 英语 |
| WOS ID | WOS:001127293000001 |
| WOS Keyword | PROPAGATION ; COAL |
| WOS Research Area | Metallurgy & Metallurgical Engineering ; Mining & Mineral Processing |
| WOS Subject | Metallurgy & Metallurgical Engineering ; Mining & Mineral Processing |
| Funding Project | National Natural Science Foundation of China |
| Funding Organization | National Natural Science Foundation of China |
| Classification | 二类 |
| Ranking | 3 |
| Contributor | Li, Yunpeng |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://dspace.imech.ac.cn/handle/311007/93750 |
| Collection | 流固耦合系统力学重点实验室 |
| Affiliation | 1.Hebei Univ Technol, Sch Civil & Transportat Engn, Xiping Rd 5340, Tianjin 300401, Peoples R China; 2.Chinese Acad Sci, Inst Mech, North 4th Ring Rd 15, Beijing 100190, Peoples R China; 3.Univ Chinese Acad Sci, Sch Engn Sci, Yuquan Rd 19, Beijing 100049, Peoples R China |
| Recommended Citation GB/T 7714 | Cao, Ruyang,Li, Yunpeng,Feng C,et al. Study on the Guiding Mechanism of Multiple and Empty Holes Under Explosion Load[J]. MINING METALLURGY & EXPLORATION,2023:10.Rp_Au:Li, Yunpeng |
| APA | Cao, Ruyang,Li, Yunpeng,冯春,&Zhang, Yiming.(2023).Study on the Guiding Mechanism of Multiple and Empty Holes Under Explosion Load.MINING METALLURGY & EXPLORATION,10. |
| MLA | Cao, Ruyang,et al."Study on the Guiding Mechanism of Multiple and Empty Holes Under Explosion Load".MINING METALLURGY & EXPLORATION (2023):10. |
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| File Name/Size | DocType | Version | Access | License | ||
| Jp2023Fa022.pdf（1167KB） | 期刊论文 | 出版稿 | 开放获取 | CC BY-NC-SA | View Download | |
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