Prediction and Controlling of Flyrock due to Blasting for Kyaukpahto Gold Mine

Abstract

This paper presents the prediction of maximum flyrock distances due to blasting for Kyaukpahto Gold Mine. Flyrock is an unwanted throw of rock fragments during bench blasting in mines. Flyrock is one of the major undesirable effects of blasting for the surface mines because it is the main cause of fatal accidents and serious injuries. The aim of this study is to control the flyrock impacts due to blasting and the estimation of safe distances. In this paper, important and widely used empirical formulae have been used to predict the maximum flyrock distance for the Kyaukpahto Gold Mine. To select the optimum flyrock distance formula, maximum throw distance empirical formulae analysis were carried out by using the data of Kyaukpahto Gold Mine. Moreover, an excel program is used for the analysis. The paper concludes with the guidelines for applying the maximum flyrock distances based on the various rock types (sandstone, dolomite, and granite), amount of charges per delay and burden distances in Myanmar surface mines.