Experimental Study on Single-excavation Compound Shock-reflection Blasting Technology of Protective Layer

The excavation of the protective layer of the dam foundation needs to balance the excavation quality and high construction speed. Based on the excavation of the diversion channel foundation protection layer of the DBDP Hydropower Station in Pakistan, this paper proposes a compound shock-reflection b...

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Main Authors: MA Mengmeng, ZHENG Jiawei, DU Haoliang, ZHAO Zhenfu, LU Wenbo
Format: Article
Language:zho
Published: Editorial Office of Pearl River 2025-01-01
Series:Renmin Zhujiang
Subjects:
Online Access:http://www.renminzhujiang.cn/thesisDetails#10.3969/j.issn.1001-9235.2025.01.010
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author MA Mengmeng
ZHENG Jiawei
DU Haoliang
ZHAO Zhenfu
LU Wenbo
author_facet MA Mengmeng
ZHENG Jiawei
DU Haoliang
ZHAO Zhenfu
LU Wenbo
author_sort MA Mengmeng
collection DOAJ
description The excavation of the protective layer of the dam foundation needs to balance the excavation quality and high construction speed. Based on the excavation of the diversion channel foundation protection layer of the DBDP Hydropower Station in Pakistan, this paper proposes a compound shock-reflection blasting technique featuring a hollow iron ball installed at the gun hole's bottom and energy dissipation materials. The energy control principle of this technology is analyzed by theoretical analysis and numerical simulation, and the technological feasibility and the influence of blasting parameters are studied by field tests. The results show that the compound shock-reflection blasting technique realizes the control and utilization of the explosion energy through multiple reflections of the explosion shock wave on different interfaces. Compared with the conventional cushion blasting hole method, the energy dissipation capacity at the hole bottom is increased by 20%, and the energy concentration between holes is increased by 18.5%, effectively mitigating the damage to the rock mass at the bottom. Under field test conditions, the excavation molding effect of the compound shock-reflection blasting technique is close to that of the traditional layered excavation method, but the construction speed can be increased by 3~4 times. At the same time, the excavation shaping effect can be significantly improved by appropriately reducing the row distance between the holes.
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institution Kabale University
issn 1001-9235
language zho
publishDate 2025-01-01
publisher Editorial Office of Pearl River
record_format Article
series Renmin Zhujiang
spelling doaj-art-2eb90db0ce29448aab677f3bce64e0e92025-02-08T19:00:01ZzhoEditorial Office of Pearl RiverRenmin Zhujiang1001-92352025-01-0146889662503957Experimental Study on Single-excavation Compound Shock-reflection Blasting Technology of Protective LayerMA MengmengZHENG JiaweiDU HaoliangZHAO ZhenfuLU WenboThe excavation of the protective layer of the dam foundation needs to balance the excavation quality and high construction speed. Based on the excavation of the diversion channel foundation protection layer of the DBDP Hydropower Station in Pakistan, this paper proposes a compound shock-reflection blasting technique featuring a hollow iron ball installed at the gun hole's bottom and energy dissipation materials. The energy control principle of this technology is analyzed by theoretical analysis and numerical simulation, and the technological feasibility and the influence of blasting parameters are studied by field tests. The results show that the compound shock-reflection blasting technique realizes the control and utilization of the explosion energy through multiple reflections of the explosion shock wave on different interfaces. Compared with the conventional cushion blasting hole method, the energy dissipation capacity at the hole bottom is increased by 20%, and the energy concentration between holes is increased by 18.5%, effectively mitigating the damage to the rock mass at the bottom. Under field test conditions, the excavation molding effect of the compound shock-reflection blasting technique is close to that of the traditional layered excavation method, but the construction speed can be increased by 3~4 times. At the same time, the excavation shaping effect can be significantly improved by appropriately reducing the row distance between the holes.http://www.renminzhujiang.cn/thesisDetails#10.3969/j.issn.1001-9235.2025.01.010compound shock-reflection blasting techniqueexcavation of protective layersexcavation shapingblasting test
spellingShingle MA Mengmeng
ZHENG Jiawei
DU Haoliang
ZHAO Zhenfu
LU Wenbo
Experimental Study on Single-excavation Compound Shock-reflection Blasting Technology of Protective Layer
Renmin Zhujiang
compound shock-reflection blasting technique
excavation of protective layers
excavation shaping
blasting test
title Experimental Study on Single-excavation Compound Shock-reflection Blasting Technology of Protective Layer
title_full Experimental Study on Single-excavation Compound Shock-reflection Blasting Technology of Protective Layer
title_fullStr Experimental Study on Single-excavation Compound Shock-reflection Blasting Technology of Protective Layer
title_full_unstemmed Experimental Study on Single-excavation Compound Shock-reflection Blasting Technology of Protective Layer
title_short Experimental Study on Single-excavation Compound Shock-reflection Blasting Technology of Protective Layer
title_sort experimental study on single excavation compound shock reflection blasting technology of protective layer
topic compound shock-reflection blasting technique
excavation of protective layers
excavation shaping
blasting test
url http://www.renminzhujiang.cn/thesisDetails#10.3969/j.issn.1001-9235.2025.01.010
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AT zhengjiawei experimentalstudyonsingleexcavationcompoundshockreflectionblastingtechnologyofprotectivelayer
AT duhaoliang experimentalstudyonsingleexcavationcompoundshockreflectionblastingtechnologyofprotectivelayer
AT zhaozhenfu experimentalstudyonsingleexcavationcompoundshockreflectionblastingtechnologyofprotectivelayer
AT luwenbo experimentalstudyonsingleexcavationcompoundshockreflectionblastingtechnologyofprotectivelayer