Optimization of spherical cartridge blasting mode in one-step raise excavation using pre-split blasting

Liu, K; Li, Q; Wu, C; Li, X; Li, J

Optimization of spherical cartridge blasting mode in one-step raise excavation using pre-split blasting

Liu, K Li, Q Wu, C

Li, X Li, J

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Publisher:: PERGAMON-ELSEVIER SCIENCE LTD
Publication Type:: Journal Article
Citation:: International Journal of Rock Mechanics and Mining Sciences, 2020, 126
Issue Date:: 2020-02-01

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Field	Value	Language
dc.contributor.author	Liu, K
dc.contributor.author	Li, Q
dc.contributor.author	Wu, C https://orcid.org/0000-0001-6786-7934
dc.contributor.author	Li, X
dc.contributor.author	Li, J https://orcid.org/0000-0003-2457-1994
dc.date.accessioned	2021-03-23T04:42:38Z
dc.date.available	2021-03-23T04:42:38Z
dc.date.issued	2020-02-01
dc.identifier.citation	International Journal of Rock Mechanics and Mining Sciences, 2020, 126
dc.identifier.issn	1365-1609
dc.identifier.issn	1873-4545
dc.identifier.uri	http://hdl.handle.net/10453/147483
dc.description.abstract	© 2019 Elsevier Ltd In one-step raise excavation, spherical cartridge blasting mode is easy to be implemented due to minimal requirement of the hole-deviation. Nevertheless, it may induce cumulative damage to the country rock. This study firstly uses a validated rock model (Johnson-Holmquist model) to simulate the damage evolution process of a raise by spherical cartridge blasting mode in LS-DYNA software. Then a field test is carried out to examine the numerical results of spherical cartridge blasting mode. Both the numerical and test results indicate that because of highly confined rock mass and restricted free face in deep raise, a large charge is required in spherical cartridge blasting mode which leads to extensive damage on the wall of the raise. In order to solve such a problem, the pre-split blasting technique is developed to optimize spherical cartridge blasting mode. According to the subsequent numerical results, the improved spherical cartridge blasting mode is successfully applied in another filling raise. This study provides an effective solution to the difficulties that are encountered in one-step raise excavation by spherical cartridge blasting mode.
dc.language	English
dc.publisher	PERGAMON-ELSEVIER SCIENCE LTD
dc.relation.ispartof	International Journal of Rock Mechanics and Mining Sciences
dc.relation.isbasedon	10.1016/j.ijrmms.2019.104182
dc.rights	info:eu-repo/semantics/closedAccess
dc.subject	0905 Civil Engineering, 0914 Resources Engineering and Extractive Metallurgy
dc.subject.classification	Mining & Metallurgy
dc.title	Optimization of spherical cartridge blasting mode in one-step raise excavation using pre-split blasting
dc.type	Journal Article
utslib.citation.volume	126
utslib.for	0905 Civil Engineering
utslib.for	0905 Civil Engineering
utslib.for	0914 Resources Engineering and Extractive Metallurgy
pubs.organisational-group	/University of Technology Sydney
pubs.organisational-group	/University of Technology Sydney/Faculty of Engineering and Information Technology
pubs.organisational-group	/University of Technology Sydney/Faculty of Engineering and Information Technology/School of Civil and Environmental Engineering
pubs.organisational-group	/University of Technology Sydney/Strength - CBI - Centre for Built Infrastructure
utslib.copyright.status	closed_access	*
dc.date.updated	2021-03-23T04:42:35Z
pubs.publication-status	Published
pubs.volume	126

Abstract:

© 2019 Elsevier Ltd In one-step raise excavation, spherical cartridge blasting mode is easy to be implemented due to minimal requirement of the hole-deviation. Nevertheless, it may induce cumulative damage to the country rock. This study firstly uses a validated rock model (Johnson-Holmquist model) to simulate the damage evolution process of a raise by spherical cartridge blasting mode in LS-DYNA software. Then a field test is carried out to examine the numerical results of spherical cartridge blasting mode. Both the numerical and test results indicate that because of highly confined rock mass and restricted free face in deep raise, a large charge is required in spherical cartridge blasting mode which leads to extensive damage on the wall of the raise. In order to solve such a problem, the pre-split blasting technique is developed to optimize spherical cartridge blasting mode. According to the subsequent numerical results, the improved spherical cartridge blasting mode is successfully applied in another filling raise. This study provides an effective solution to the difficulties that are encountered in one-step raise excavation by spherical cartridge blasting mode.

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http://hdl.handle.net/10453/147483