Effect of the Location of the Detonation Initiation Point for Bench Blasting
Uneven floor and fragmentation play an important role in blasting operations due to the direct effects on the efficiency of hauling and loading. This paper focuses on the influences of initiation position on bench blasting in order to improve blasting effects. The numerical simulations of bench blas...
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Series: | Shock and Vibration |
Online Access: | http://dx.doi.org/10.1155/2015/907310 |
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doaj-38f9b451155f46a3ae953146355ce1ca2020-11-24T23:54:15ZengHindawi LimitedShock and Vibration1070-96221875-92032015-01-01201510.1155/2015/907310907310Effect of the Location of the Detonation Initiation Point for Bench BlastingLiang Liu0Ming Chen1Wenbo Lu2Yingguo Hu3Zhendong Leng4State Key Laboratory of Water Resources and Hydropower Engineering Science, Wuhan University, Wuhan, Hubei 430072, ChinaState Key Laboratory of Water Resources and Hydropower Engineering Science, Wuhan University, Wuhan, Hubei 430072, ChinaState Key Laboratory of Water Resources and Hydropower Engineering Science, Wuhan University, Wuhan, Hubei 430072, ChinaState Key Laboratory of Water Resources and Hydropower Engineering Science, Wuhan University, Wuhan, Hubei 430072, ChinaState Key Laboratory of Water Resources and Hydropower Engineering Science, Wuhan University, Wuhan, Hubei 430072, ChinaUneven floor and fragmentation play an important role in blasting operations due to the direct effects on the efficiency of hauling and loading. This paper focuses on the influences of initiation position on bench blasting in order to improve blasting effects. The numerical simulations of bench blasting at different initiation points (top, middle, and bottom) are implemented based on secondary development of LS-DYNA with a tensile-compressive damage model. The damage spatial distribution characteristics of different initiation points are compared. The outlines of rock foundation and boulder areas are analyzed with the damage threshold of critical breakage that is ascertained by acoustic characteristic of damage rock mass. Results of the numerical simulations demonstrate that different initiation points make a great influence on the stress and energy distribution in blasting process and induce different blasting effects. Middle initiation turns out to be the best initiation to increase the flatness of the floor and decrease the oversize boulder ratio simultaneously, which will increase the damage areas of the bottom and top regions and give a better blasting effect. Field experiment in Baihetan Station was carried out to validate conclusions of numerical simulation. Research could provide a good reference for the improvement of rock blasting.http://dx.doi.org/10.1155/2015/907310 |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Liang Liu Ming Chen Wenbo Lu Yingguo Hu Zhendong Leng |
spellingShingle |
Liang Liu Ming Chen Wenbo Lu Yingguo Hu Zhendong Leng Effect of the Location of the Detonation Initiation Point for Bench Blasting Shock and Vibration |
author_facet |
Liang Liu Ming Chen Wenbo Lu Yingguo Hu Zhendong Leng |
author_sort |
Liang Liu |
title |
Effect of the Location of the Detonation Initiation Point for Bench Blasting |
title_short |
Effect of the Location of the Detonation Initiation Point for Bench Blasting |
title_full |
Effect of the Location of the Detonation Initiation Point for Bench Blasting |
title_fullStr |
Effect of the Location of the Detonation Initiation Point for Bench Blasting |
title_full_unstemmed |
Effect of the Location of the Detonation Initiation Point for Bench Blasting |
title_sort |
effect of the location of the detonation initiation point for bench blasting |
publisher |
Hindawi Limited |
series |
Shock and Vibration |
issn |
1070-9622 1875-9203 |
publishDate |
2015-01-01 |
description |
Uneven floor and fragmentation play an important role in blasting operations due to the direct effects on the efficiency of hauling and loading. This paper focuses on the influences of initiation position on bench blasting in order to improve blasting effects. The numerical simulations of bench blasting at different initiation points (top, middle, and bottom) are implemented based on secondary development of LS-DYNA with a tensile-compressive damage model. The damage spatial distribution characteristics of different initiation points are compared. The outlines of rock foundation and boulder areas are analyzed with the damage threshold of critical breakage that is ascertained by acoustic characteristic of damage rock mass. Results of the numerical simulations demonstrate that different initiation points make a great influence on the stress and energy distribution in blasting process and induce different blasting effects. Middle initiation turns out to be the best initiation to increase the flatness of the floor and decrease the oversize boulder ratio simultaneously, which will increase the damage areas of the bottom and top regions and give a better blasting effect. Field experiment in Baihetan Station was carried out to validate conclusions of numerical simulation. Research could provide a good reference for the improvement of rock blasting. |
url |
http://dx.doi.org/10.1155/2015/907310 |
work_keys_str_mv |
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1725466517500329984 |