Study on the Guiding Mechanism of Multiple and Empty Holes Under Explosion Load

doi:10.1007/s42461-023-00902-2

CORC > 力学研究所 > 中国科学院力学研究所 > 流固耦合系统力学重点实验室(2012-)

	Study on the Guiding Mechanism of Multiple and Empty Holes Under Explosion Load
	Cao, Ruyang 3; Li, Yunpeng 3; Feng C(冯春)1,2; Zhang, Yiming 3
刊名	MINING METALLURGY & EXPLORATION
	2023-12-19
页码	10
关键词	Induced hole CDEM Crack propagation Double hole blasting Precise blasting
ISSN号	2524-3462
DOI	10.1007/s42461-023-00902-2
通讯作者	Li, Yunpeng(202311601008@stu.hebut.edu.cn)
英文摘要	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.
分类号	二类
资助项目	National Natural Science Foundation of China
WOS关键词	PROPAGATION ; COAL
WOS研究方向	Metallurgy & Metallurgical Engineering ; Mining & Mineral Processing
语种	英语
WOS记录号	WOS:001127293000001
资助机构	National Natural Science Foundation of China
其他责任者	Li, Yunpeng
内容类型	期刊论文
源URL	[http://dspace.imech.ac.cn/handle/311007/93749]
专题	力学研究所_流固耦合系统力学重点实验室(2012-)
作者单位	1.Univ Chinese Acad Sci, Sch Engn Sci, Yuquan Rd 19, Beijing 100049, Peoples R China 2.Chinese Acad Sci, Inst Mech, North 4th Ring Rd 15, Beijing 100190, Peoples R China; 3.Hebei Univ Technol, Sch Civil & Transportat Engn, Xiping Rd 5340, Tianjin 300401, Peoples R China;
推荐引用方式 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.
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.