Influence of Hole Arrangement on the Section of Cavity Formed by Cutting Blast

In order to optimize the arrangement of cutting holes in tunnel blast in Dahongshan Copper Mine, theoretical analysis and numerical simulation were combined to preliminarily determine the diameter of the hollow hole and the distance between the charge hole and the hollow hole during cut blast, which...

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Autores principales:	Xianglong Li, Qiang Li, Jianguo Wang, Zichen Wang, Hao Wang, Zihao Tao
Formato:	article
Lenguaje:	EN
Publicado:	Hindawi-Wiley 2021
Materias:	Geology QE1-996.5
Acceso en línea:	https://doaj.org/article/cfb304e3674740e482a3283b0106e19a
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spelling	oai:doaj.org-article:cfb304e3674740e482a3283b0106e19a2021-11-22T01:11:17ZInfluence of Hole Arrangement on the Section of Cavity Formed by Cutting Blast1468-812310.1155/2021/9080560https://doaj.org/article/cfb304e3674740e482a3283b0106e19a2021-01-01T00:00:00Zhttp://dx.doi.org/10.1155/2021/9080560https://doaj.org/toc/1468-8123In order to optimize the arrangement of cutting holes in tunnel blast in Dahongshan Copper Mine, theoretical analysis and numerical simulation were combined to preliminarily determine the diameter of the hollow hole and the distance between the charge hole and the hollow hole during cut blast, which was verified through the field blast test. The research results show that with the increase of the hole diameter, the peak compressive stress of rock surrounding the empty hole gradually decreases, and the peak tensile stress gradually increases, which is consistent with the calculation results; when the hole diameter is 10 cm, the two first blast holes are arranged horizontally and 30 cm from the empty hole, two second blast holes are arranged vertically and 40 cm away from the empty hole, and the four third blast holes are arranged at a horizontal distance of 45 cm and a vertical distance of 45 cm from the empty hole; the contour area in numerical simulation is the maximum. The difference in contour area, contour width, and contour and contour height between the measured value and the simulation result is 5.3%, 3.3%, and 3.4%, respectively, indicating that the combination of theoretical calculation and numerical simulation is suitable for prediction of cavity section after blast in tunnel excavation.Xianglong LiQiang LiJianguo WangZichen WangHao WangZihao TaoHindawi-WileyarticleGeologyQE1-996.5ENGeofluids, Vol 2021 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Geology QE1-996.5
spellingShingle	Geology QE1-996.5 Xianglong Li Qiang Li Jianguo Wang Zichen Wang Hao Wang Zihao Tao Influence of Hole Arrangement on the Section of Cavity Formed by Cutting Blast
description	In order to optimize the arrangement of cutting holes in tunnel blast in Dahongshan Copper Mine, theoretical analysis and numerical simulation were combined to preliminarily determine the diameter of the hollow hole and the distance between the charge hole and the hollow hole during cut blast, which was verified through the field blast test. The research results show that with the increase of the hole diameter, the peak compressive stress of rock surrounding the empty hole gradually decreases, and the peak tensile stress gradually increases, which is consistent with the calculation results; when the hole diameter is 10 cm, the two first blast holes are arranged horizontally and 30 cm from the empty hole, two second blast holes are arranged vertically and 40 cm away from the empty hole, and the four third blast holes are arranged at a horizontal distance of 45 cm and a vertical distance of 45 cm from the empty hole; the contour area in numerical simulation is the maximum. The difference in contour area, contour width, and contour and contour height between the measured value and the simulation result is 5.3%, 3.3%, and 3.4%, respectively, indicating that the combination of theoretical calculation and numerical simulation is suitable for prediction of cavity section after blast in tunnel excavation.
format	article
author	Xianglong Li Qiang Li Jianguo Wang Zichen Wang Hao Wang Zihao Tao
author_facet	Xianglong Li Qiang Li Jianguo Wang Zichen Wang Hao Wang Zihao Tao
author_sort	Xianglong Li
title	Influence of Hole Arrangement on the Section of Cavity Formed by Cutting Blast
title_short	Influence of Hole Arrangement on the Section of Cavity Formed by Cutting Blast
title_full	Influence of Hole Arrangement on the Section of Cavity Formed by Cutting Blast
title_fullStr	Influence of Hole Arrangement on the Section of Cavity Formed by Cutting Blast
title_full_unstemmed	Influence of Hole Arrangement on the Section of Cavity Formed by Cutting Blast
title_sort	influence of hole arrangement on the section of cavity formed by cutting blast
publisher	Hindawi-Wiley
publishDate	2021
url	https://doaj.org/article/cfb304e3674740e482a3283b0106e19a
work_keys_str_mv	AT xianglongli influenceofholearrangementonthesectionofcavityformedbycuttingblast AT qiangli influenceofholearrangementonthesectionofcavityformedbycuttingblast AT jianguowang influenceofholearrangementonthesectionofcavityformedbycuttingblast AT zichenwang influenceofholearrangementonthesectionofcavityformedbycuttingblast AT haowang influenceofholearrangementonthesectionofcavityformedbycuttingblast AT zihaotao influenceofholearrangementonthesectionofcavityformedbycuttingblast
_version_	1718418308751949824

Influence of Hole Arrangement on the Section of Cavity Formed by Cutting Blast

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