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A Preliminary Study on the Design Method for Large-Diameter Deep-Hole Presplit Blasting and Its Vibration-Isolation Effect
Joint Authors
Xiao, Shuangshuang
Wang, Hongsheng
Dong, Guowei
Source
Issue
Vol. 2019, Issue 2019 (31 Dec. 2019), pp.1-11, 11 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2019-11-25
Country of Publication
Egypt
No. of Pages
11
Main Subjects
Abstract EN
Presplit blasting can reduce vibration and back impact induced by cast blasting, thus resulting in a smooth bench slope.
To design reasonable presplit blasting parameters, this research investigated the formation of presplit faces based on the explosion mechanics and revealed the cracking mechanism of presplit blasting.
According to the stress distribution in the vicinity of the blast holes under the action of explosive stress waves and blasting gas, we deduced theoretical formulae for parameters including charge mass in blast holes, hole spacing, and distance from presplit blast holes to cushion holes.
On this basis, a method was proposed for the design of large-diameter deep-hole presplit blasting.
Field testing was conducted by setting different spacing for presplit blast holes, to monitor the blasting-induced vibration.
The results showed that appropriate hole spacing can reduce the particle vibration velocity and the attenuation index of blasting-induced vibration changed slightly while the attenuation coefficient decreased significantly; the formed presplit faces were smooth and had a high half-cast factor.
Finally, the reasonable hole spacing for presplit blasting, distance from presplit blast hole to the cushion hole, and the charge mass in blast holes in the Heidaigou open-pit coal mine were determined, respectively.
American Psychological Association (APA)
Xiao, Shuangshuang& Wang, Hongsheng& Dong, Guowei. 2019. A Preliminary Study on the Design Method for Large-Diameter Deep-Hole Presplit Blasting and Its Vibration-Isolation Effect. Shock and Vibration،Vol. 2019, no. 2019, pp.1-11.
https://search.emarefa.net/detail/BIM-1211008
Modern Language Association (MLA)
Xiao, Shuangshuang…[et al.]. A Preliminary Study on the Design Method for Large-Diameter Deep-Hole Presplit Blasting and Its Vibration-Isolation Effect. Shock and Vibration No. 2019 (2019), pp.1-11.
https://search.emarefa.net/detail/BIM-1211008
American Medical Association (AMA)
Xiao, Shuangshuang& Wang, Hongsheng& Dong, Guowei. A Preliminary Study on the Design Method for Large-Diameter Deep-Hole Presplit Blasting and Its Vibration-Isolation Effect. Shock and Vibration. 2019. Vol. 2019, no. 2019, pp.1-11.
https://search.emarefa.net/detail/BIM-1211008
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1211008