Research on Effects of Blast Casting Vibration and Vibration Absorption of Presplitting Blasting in Open Cast Mine
Joint Authors
Xiao, Shuangshuang
Li, Kemin
Ding, Xiaohua
Ma, Li
Chinyanta, Sydney
Source
Issue
Vol. 2016, Issue 2016 (31 Dec. 2016), pp.1-9, 9 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2016-08-03
Country of Publication
Egypt
No. of Pages
9
Main Subjects
Abstract EN
The impact energy produced by blast casting is able to break and cast rocks, yet the strong vibration effects caused at the same time would threaten the safety of mines.
Based on the theory of Janbu’s Limit Equilibrium Method (LEM), pseudo-static method has been incorporated to analyze the influence of dynamic loads of blasting on slope stability.
The horizontal loads produced by blast vibrations cause an increase in sliding forces, and this leads to a lower slope stability coefficient.
When the tensile stresses of the two adjacent blast holes are greater than the tensile strength of rock mass, the radical oriented cracks are formed, which is the precondition for the formation of presplit face.
Thus, the formula for calculating the blast hole spacing of presplit blasting can be obtained.
Based on the analysis of the principles of vibration tester and vibration pick-up in detecting blast vibrations, a detection scheme of blast vibration is worked out by taking the blast area with precrack rear and non-precrack side of the detection object.
The detection and research results of blast vibration show that presplit blasting can reduce the attenuation coefficient of stress wave by half, and the vibration absorption ratio could reach 50.2%; the impact of dynamic loads on the end-wall slope stability coefficient is 1.98%, which proves that presplit blasting plays an important role in shock absorption of blast casting.
American Psychological Association (APA)
Ma, Li& Li, Kemin& Xiao, Shuangshuang& Ding, Xiaohua& Chinyanta, Sydney. 2016. Research on Effects of Blast Casting Vibration and Vibration Absorption of Presplitting Blasting in Open Cast Mine. Shock and Vibration،Vol. 2016, no. 2016, pp.1-9.
https://search.emarefa.net/detail/BIM-1119117
Modern Language Association (MLA)
Ma, Li…[et al.]. Research on Effects of Blast Casting Vibration and Vibration Absorption of Presplitting Blasting in Open Cast Mine. Shock and Vibration No. 2016 (2016), pp.1-9.
https://search.emarefa.net/detail/BIM-1119117
American Medical Association (AMA)
Ma, Li& Li, Kemin& Xiao, Shuangshuang& Ding, Xiaohua& Chinyanta, Sydney. Research on Effects of Blast Casting Vibration and Vibration Absorption of Presplitting Blasting in Open Cast Mine. Shock and Vibration. 2016. Vol. 2016, no. 2016, pp.1-9.
https://search.emarefa.net/detail/BIM-1119117
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1119117