Hustrulid bar - a dynamic strength test and its application to the cautious blasting of rock

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Title Hustrulid bar - a dynamic strength test and its application to the cautious blasting of rock
Publication Type dissertation
School or College College of Mines & Earth Sciences
Department Mining Engineering
Author Johnson, Jeffrey Craig
Date 2010
Description Drill and blast is a common mining technique. It is used to damage the rock for extraction and leave the remaining rock for support. Its perfection is the goal of cautious blasting. The theory of cautious blasting describes the relationships connecting the blasthole, the explosive, and the rock mass to the resulting damage. Blast damage is caused by the propagation of stress waves and the expansion of gas. The focus is on the damage caused by the stress waves, in particular, the radial compressive stress wave. Stress waves decay by three mechanisms: geometric spreading, damage, and seismic attenuation. Where the stress has decayed to its dynamic compressive strength the damage ends. Therefore, if one knows the initial stress, the amount of stress decay, and the strength, then the damage distance can be computed.
Type Text
Publisher University of Utah
Subject Blast damage blast design; Blast design; Blasting; Dynamic rock strength blast damage; Hopkinson bar; Hustrulid bar
Dissertation Institution University of Utah
Dissertation Name PhD
Language eng
Rights Management ©Jeffrey Craig Johnson
Format application/pdf
Format Medium application/pdf
Format Extent 24,958,960 bytes
ARK ark:/87278/s6j10hts
Setname ir_etd
ID 194006
Reference URL https://collections.lib.utah.edu/ark:/87278/s6j10hts
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