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Blasting Impact Simulation Test and Fragmentation Distribution Characteristics in an Open-Pit Mine
Joint Authors
Ding, Xiaohua
Li, Ming
Shi, Xuyang
Lu, Xiang
Zhou, Wei
Luan, Boyu
Source
Issue
Vol. 2019, Issue 2019 (31 Dec. 2019), pp.1-13, 13 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2019-05-27
Country of Publication
Egypt
No. of Pages
13
Main Subjects
Abstract EN
Based on the split Hopkinson pressure bar (SHPB) test system, dynamic impact tests of coal specimens under different impact pressures were carried out to study the relationship between the impact load and the size of crushed lump coal.
Based on the theory of stress wave attenuation, the relationship between the blasting impact load in a single-hole blasting area of a coal seam and the load applied in an impact failure test of a coal specimen in the laboratory was established.
According to the characteristics of the fragmentation distribution of the coal specimens destroyed under a laboratory impact load and the requirement of the minimum cost control of coal blasting in an open-pit coal mine, the fragmentation size range was divided into three groups: large-diameter, medium-diameter, and powder particles.
Based on this range, the variation rule of the mass percentage of coal fragments with impact pressure was obtained.
Established on the evaluation principle of the blasting effect in an open-pit coal mine, a good impact fragmentation effect was obtained.
The good pressure range is 0.30 MPa≤P<0.90 MPa.
American Psychological Association (APA)
Ding, Xiaohua& Lu, Xiang& Zhou, Wei& Shi, Xuyang& Luan, Boyu& Li, Ming. 2019. Blasting Impact Simulation Test and Fragmentation Distribution Characteristics in an Open-Pit Mine. Shock and Vibration،Vol. 2019, no. 2019, pp.1-13.
https://search.emarefa.net/detail/BIM-1211211
Modern Language Association (MLA)
Ding, Xiaohua…[et al.]. Blasting Impact Simulation Test and Fragmentation Distribution Characteristics in an Open-Pit Mine. Shock and Vibration No. 2019 (2019), pp.1-13.
https://search.emarefa.net/detail/BIM-1211211
American Medical Association (AMA)
Ding, Xiaohua& Lu, Xiang& Zhou, Wei& Shi, Xuyang& Luan, Boyu& Li, Ming. Blasting Impact Simulation Test and Fragmentation Distribution Characteristics in an Open-Pit Mine. Shock and Vibration. 2019. Vol. 2019, no. 2019, pp.1-13.
https://search.emarefa.net/detail/BIM-1211211
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1211211