A Review of General Considerations for Assessing Rock Mass Blastability and Fragmentation

Widzyk-Capehart, E. and Lilly, P. (2002) A Review of General Considerations for Assessing Rock Mass Blastability and Fragmentation. Fragblast, 6 2: 151-168.


Author Widzyk-Capehart, E.
Lilly, P.
Title A Review of General Considerations for Assessing Rock Mass Blastability and Fragmentation
Journal name Fragblast   Check publisher's open access policy
ISSN 1744-4977
1385-514X
Publication date 2002-10
Sub-type Article (original research)
DOI 10.1076/frag.6.2.151.8667
Volume 6
Issue 2
Start page 151
End page 168
Total pages 18
Place of publication Netherlands
Publisher Swets & Zeitlinger BV
Language eng
Subject 0999 Other Engineering
Abstract Blasting is the primary comminution process in most mining operations. This process involves the highly complex and dynamic interaction between two main components. The first is the detonating explosive and the second is the rock mass into which the explosive is loaded. The mechanical properties of the rock material (such as dynamic strength, tensile strength, dynamic modulus and fracture toughness) are important considerations in understanding the blasting process. However, it is the characteristics of the geological defects (joints, foliation planes, bedding planes) within the rock mass that ultimately determine how effectively a blast performs in terms of fragmentation, all else being equal. The defect characteristics include, but are not limited to, their orientation, spacing, and mechanical properties. During the blasting process, some of the geotechnical characteristics of the rock mass are substantially changed. From the blasting outcome point of view, the most notable and important is the change in fragment size distribution that the rock mass undergoes. The pre-blast in situ defect-bounded block size distribution is transformed into the post-blast muckpile fragment size distribution. Consequently, it is fundamental to our understanding of and ability to predict the blasting process that both the blastability of a rock mass and its transformation into the fragment size distribution can be appropriately quantified.
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Unknown

Document type: Journal Article
Sub-type: Article (original research)
Collection: School of Mechanical & Mining Engineering Publications
 
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Created: Tue, 02 May 2006, 19:51:48 EST