DENSITY MONITORING OF BULK EMULSION EXPLOSIVES IN CONFINED BLASTHOLES

HOLOS Pub Date : 2024-04-19 DOI:10.15628/holos.2024.14671
Felipe França Sitonio, Jair Carlos Koppe
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Abstract

Parameter’s control of explosives used in open pit mining operations have become more relevant over the years, bringing a better understanding of detonation performance. Giving into consideration that bulk emulsion density reflects on blasting results due to its importance in product sensitivity and velocity of detonation (VOD), blast designs are conducted assuming that cup density measurements are reliable and explosives gassing agents will perform as per specifications. Nevertheless, confinement conditions in boreholes are often neglected on predictive modelling. This paper describes the assembly of a device equipped with pressure sensors and its utilization in confined boreholes, obtaining in situ monitoring of density variation in explosive columns. The results enabled a comparison between bulk emulsion density variation when acting in different environments, providing detailed insights into how chemically sensitized explosives behave into different circumstances, giving the opportunity to re-evaluate blast design.
密闭爆破孔中散装乳化炸药的密度监测
多年来,露天采矿作业中所用炸药的参数控制变得越来越重要,从而使人们对起爆性能有了更好的了解。考虑到散装乳化液密度对产品敏感性和起爆速度(VOD)的重要影响,爆破设计时假定杯密度测量可靠,炸药发气剂性能符合规格要求。然而,钻孔中的封闭条件往往在预测建模中被忽视。本文介绍了配备压力传感器的装置的组装及其在封闭钻孔中的应用,以获得对炸药柱密度变化的现场监测。结果可以比较在不同环境下的乳化液密度变化,详细了解化学敏化炸药在不同环境下的表现,为重新评估爆破设计提供了机会。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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