Evaluating pre-split performance through direct measurements of near field acceleration, particle velocity and gas pressure

Onederra, I. A., Catalan, A. and Quidim, J. (2015) Evaluating pre-split performance through direct measurements of near field acceleration, particle velocity and gas pressure. Mining Technology, 1-11. doi:10.1179/1743286315Y.0000000023


Author Onederra, I. A.
Catalan, A.
Quidim, J.
Title Evaluating pre-split performance through direct measurements of near field acceleration, particle velocity and gas pressure
Journal name Mining Technology   Check publisher's open access policy
ISSN 1474-9009
1743-2863
Publication date 2015
Sub-type Article (original research)
DOI 10.1179/1743286315Y.0000000023
Open Access Status Not Open Access
Start page 1
End page 11
Total pages 11
Place of publication Abingdon, Oxfordshire, United Kingdom
Publisher Taylor & Francis
Collection year 2016
Language eng
Abstract Pre-split techniques are routinely used to minimise rock mass damage from production blasting. Design parameters rely on site-specific guidelines and in order to improve designs, it is important to be able to measure its performance. One criterion is related to the pre-split ability to adequately filter blast-induced stresses and explosion gases. This paper presents the results of a monitoring program implemented to evaluate the performance of pre-split practices. Triaxial accelerometers and pressure sensors were installed behind pre-split lines and a site-specific criterion was established to determine whether or not filtering effects were occurring. The recorded maximum peak particle velocity (PPV) vector sum behind pre-splits in all blasts monitored was below the threshold of damage of intact rock and rock mass discontinuities. With regards to the recorded gas pressure, measurements from production blasts showed fluctuations of low pressure levels, indicating that pre-split parameters were effectively filtering-induced stresses and gases.
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: School of Mechanical & Mining Engineering Publications
Official 2016 Collection
 
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Created: Tue, 02 Feb 2016, 15:40:00 EST by Rose Clements on behalf of School of Mechanical and Mining Engineering