Theoretical Study on Radial Distribution Laws of Rock Mass Damage Factors under Decoupled Charge Blasting
Joint Authors
Zhang, Jichun
Pan, Qiang
Zheng, Shuangying
Shi, Hongchao
Fan, Zhanfeng
Source
Issue
Vol. 2020, Issue 2020 (31 Dec. 2020), pp.1-10, 10 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2020-07-28
Country of Publication
Egypt
No. of Pages
10
Main Subjects
Abstract EN
In this paper, the radial distribution laws of damage factors under decoupled charge blasting are studied for the optimization design of blasting parameters.
Through defining the critical radial decoupling coefficient, the damage zone around the borehole is partitioned and the characteristics are described.
Based on the damage factor defined by Taylor’s effective elastic modulus, the formulas of the radial distribution laws of damage factors are derived by the attenuation law of stress wave and the theory of thick-walled cylinder, respectively, which are then superposed to obtain the formula under the combined action of explosion stress wave and quasistatic gas.
Experimental verification indicates that the theoretical values, which have a good correlation with the test data and are of high accuracy, can characterize the radial distribution laws of damage factors and estimate the damage range.
When a radial decoupling coefficient is less than the critical value, the attenuation rate of damage factors firstly increases and then decreases with the increase of distance, and a serious damage zone is caused.
Conversely, it decreases gradually, and the serious damage zone is not caused.
Therefore, on the premise of stable detonation, it is necessary to apply an appropriate radial decoupling coefficient which is larger than the critical value to smooth or presplit blasting.
American Psychological Association (APA)
Pan, Qiang& Zhang, Jichun& Zheng, Shuangying& Shi, Hongchao& Fan, Zhanfeng. 2020. Theoretical Study on Radial Distribution Laws of Rock Mass Damage Factors under Decoupled Charge Blasting. Shock and Vibration،Vol. 2020, no. 2020, pp.1-10.
https://search.emarefa.net/detail/BIM-1210238
Modern Language Association (MLA)
Pan, Qiang…[et al.]. Theoretical Study on Radial Distribution Laws of Rock Mass Damage Factors under Decoupled Charge Blasting. Shock and Vibration No. 2020 (2020), pp.1-10.
https://search.emarefa.net/detail/BIM-1210238
American Medical Association (AMA)
Pan, Qiang& Zhang, Jichun& Zheng, Shuangying& Shi, Hongchao& Fan, Zhanfeng. Theoretical Study on Radial Distribution Laws of Rock Mass Damage Factors under Decoupled Charge Blasting. Shock and Vibration. 2020. Vol. 2020, no. 2020, pp.1-10.
https://search.emarefa.net/detail/BIM-1210238
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1210238