Stress wave superposition effect and crack initiation mechanism between two adjacent boreholes

doi:10.1016/j.ijrmms.2021.104622

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-)

	Stress wave superposition effect and crack initiation mechanism between two adjacent boreholes
	Ding, Chenxi 3,4; Yang, Renshu 2,4; Feng C(冯春)1
刊名	INTERNATIONAL JOURNAL OF ROCK MECHANICS AND MINING SCIENCES
	2021-02-01
卷号	138 页码:9
关键词	Blasting Stress wave superposition Crack initiation Digital image correlation Model experiment Numerical simulation
ISSN号	1365-1609
DOI	10.1016/j.ijrmms.2021.104622
通讯作者	Yang, Renshu(yrs@cumtb.edu.cn)
英文摘要	In rock blasting, the effect that stress wave superposition between boreholes has on rock fragmentation remains controversial. Here, we experimentally study the stress wave superposition effect between two adjacent boreholes by combining the model experiment method and the high-speed digital image correlation experimental system. Numerical simulations based on the continuous-discontinuous element method are also used to analyze the crack initiation mechanism between two adjacent boreholes. The model experiment results show that, in the stress wave superposition area between boreholes, the stress component in the direction of the connection line of the two boreholes is mainly compressive, while that in the direction perpendicular to the connection line is mainly tensile. Superposition of the blasting stress waves between the boreholes strengthens both stress components, but the strengthening effect on the stress component in the direction perpendicular to the connection line (mainly tensile) is significantly less than that in the direction of the connection line (mainly compressive). Moreover, these stress enhancements are not sufficient to induce crack initiation in the stress wave superposition area between boreholes. Numerical simulation analysis further shows that crack initiation in the stress wave superposition area has relatively stringent requirements on the explosive parameters, rock properties and borehole spacing, which are difficult to observe in engineering practice and model experiments.
分类号	一类
资助项目	National Natural Science Foundation of China[51934001] ; 2020 annual Open Fund of Failure Mechanics & Engineering Disaster Prevention and Mitigation, Key Laboratory of Sichuan Province, Sichuan University[2020JDS0022] ; China Postdoctoral Science Foundation[2020M680354]
WOS关键词	ROCK ; EXCAVATION ; DAMAGE ; FRAGMENTATION ; MODEL
WOS研究方向	Engineering ; Mining & Mineral Processing
语种	英语
WOS记录号	WOS:000649554100009
资助机构	National Natural Science Foundation of China ; 2020 annual Open Fund of Failure Mechanics & Engineering Disaster Prevention and Mitigation, Key Laboratory of Sichuan Province, Sichuan University ; China Postdoctoral Science Foundation
其他责任者	Yang, Renshu
内容类型	期刊论文
源URL	[http://dspace.imech.ac.cn/handle/311007/86602]
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.Chinese Acad Sci, Inst Mech, Key Lab Mech Fluid Solid Coupling Syst, Beijing 100190, Peoples R China 2.State Key Lab Geomech & Deep Underground Engn, Beijing 100083, Peoples R China; 3.Sichuan Univ, Key Lab Sichuan Prov, Failure Mech & Engn Disaster Prevent & Mitigat, Chengdu 610065, Peoples R China; 4.Univ Sci & Technol Beijing, Sch Civil & Resource Engn, Beijing 100083, Peoples R China;
推荐引用方式 GB/T 7714	Ding, Chenxi,Yang, Renshu,Feng C. Stress wave superposition effect and crack initiation mechanism between two adjacent boreholes[J]. INTERNATIONAL JOURNAL OF ROCK MECHANICS AND MINING SCIENCES,2021,138:9.
APA	Ding, Chenxi,Yang, Renshu,&冯春.(2021).Stress wave superposition effect and crack initiation mechanism between two adjacent boreholes.INTERNATIONAL JOURNAL OF ROCK MECHANICS AND MINING SCIENCES,138,9.
MLA	Ding, Chenxi,et al."Stress wave superposition effect and crack initiation mechanism between two adjacent boreholes".INTERNATIONAL JOURNAL OF ROCK MECHANICS AND MINING SCIENCES 138(2021):9.