Authors: Farhad Faramarzi Hamid Mansouri Mohammad Ali Ebrahimi Farsangi
Publish Date: 2013/08/17
Volume: 47, Issue: 4, Pages: 1291-1306
Abstract
The environmental effects of blasting must be controlled in order to comply with regulatory limits Because of safety concerns and risk of damage to infrastructures equipment and property and also having a good fragmentation flyrock control is crucial in blasting operations If measures to decrease flyrock are taken then the flyrock distance would be limited and in return the risk of damage can be reduced or eliminated This paper deals with modeling the level of risk associated with flyrock and also flyrock distance prediction based on the rock engineering systems RES methodology In the proposed models 13 effective parameters on flyrock due to blasting are considered as inputs and the flyrock distance and associated level of risks as outputs In selecting input data the simplicity of measuring input data was taken into account as well The data for 47 blasts carried out at the Sungun copper mine western Iran were used to predict the level of risk and flyrock distance corresponding to each blast The obtained results showed that for the 47 blasts carried out at the Sungun copper mine the level of estimated risks are mostly in accordance with the measured flyrock distances Furthermore a comparison was made between the results of the flyrock distance predictive RESbased model the multivariate regression analysis model MVRM and also the dimensional analysis model For the RESbased model R 2 and root mean square error RMSE are equal to 086 and 1001 respectively whereas for the MVRM and dimensional analysis R 2 and RMSE are equal to 084 and 1220 and 076 and 1375 respectively These achievements confirm the better performance of the RESbased model over the other proposed models
Keywords: