A numerical analysis of the presplitting controlled blasting method

M. Sharafisafa, A. Mortazavi

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Controlled blasting techniques are used to control overbreak and to aid in the stability of the remaining rock formation. The less competent the rock mass itself is, the more care has to be taken in avoiding damage. Presplitting is one of the most common methods which is used in many open pit mining and surface blast design. The purpose of presplitting is to form a fracture plane across which the radial cracks from the production blast cannot travel. Presplitting should be thought of as a protective measure to keep the final wall from being damaged by the production blasting. The purpose of this study is to investigate the effect of presplitting on the generation of a smooth wall in a rock domain under a surface blast process. The 2D distinct element method was used for the simulation of presplitting in a rock slope. A simple blast load history was applied to the inner wall of each blasthole. Important parameters that were considered in the analysis were stress tensor and fracturing pattern. The analysis results show that the blast loading magnitude and blasthole spacing are significant parameter affecting the final results.

Original languageEnglish
Title of host publicationRock Fragmentation by Blasting, FRAGBLAST 10 - Proceedings of the 10th International Symposium on Rock Fragmentation by Blasting
Pages707-714
Number of pages8
Publication statusPublished - Jan 1 2013
Externally publishedYes
Event10th International Symposium on Rock Fragmentation by Blasting, FRAGBLAST 10 - New Delhi, India
Duration: Nov 24 2012Nov 25 2012

Publication series

NameRock Fragmentation by Blasting, FRAGBLAST 10 - Proceedings of the 10th International Symposium on Rock Fragmentation by Blasting

Conference

Conference10th International Symposium on Rock Fragmentation by Blasting, FRAGBLAST 10
CountryIndia
CityNew Delhi
Period11/24/1211/25/12

ASJC Scopus subject areas

  • Geotechnical Engineering and Engineering Geology

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