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Accession Number PB2013-105770
Title New Perimeter Control Blast Design Concept for Underground Metal/Nonmetal Drifting Applications.
Publication Date Feb 2013
Media Count 79p
Personal Author J. C. Johnson S. R. Iverson W. A. Hustrulid
Abstract This report presents a new concept in perimeter control blasting for underground metal/nonmetal mine drifting applications focusing on the importance of the buffer holes in a blast design. The new blast design concept applies the understanding of radial damage that is caused by the buffer hole column charge. Buffer hole radial damage is defined by a practical damage limit applied to the rock lying between the buffer holes and the perimeter. A favorable comparison was made between five successful controlled blast designs and the concept of practical damage limit. This concept is easy to use and acceptance of the approach would only require mines to conduct trial blasts to test the design theory.
Keywords Blast
Damage assessment
Design
Explosive effects
Metals
Mining industry
Nonmetals
Rocks
Underground mining


 
Source Agency National Institute for Occupational Safety and Health
NTIS Subject Category 48A - Mineral Industries
Corporate Author National Inst. for Occupational Safety and Health, Washington, DC.
Document Type Technical report
Title Note N/A
NTIS Issue Number 1313
Contract Number N/A

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