混装乳化炸药基质温度与敏化剂浓度匹配试验研究及应用OA

This study systematically investigated the synergistic relationship between matrix temperature and so-dium nitrite concentration to resolve density unevenness and explosive power instability in site-mixed emulsion explo-sives caused by the mismatch between matrix temperature and sensitizer(sodium nitrite)concentration during pro-duction.Using an orthogonal experimental design,matrix temperature gradients ranging from 40℃ to 70℃ and sodi-um nitrite concentration gradients ranging from 1.2％to 2.8％were systematically established.Multiple sets of com-parative tests were conducted to comprehensively examine the impact of these two factors on the density of emulsion explosives.The experimental results demonstrate that matrix temperature plays a critical role in determining the foa-ming reaction rate,with elevated temperatures markedly accelerating the reaction and,consequently,the foaming process.However,this acceleration often leads to excessive foaming,consequently reducing the explosive density.In contrast,lower temperatures slow the reaction,often resulting in insufficient foaming,which increases explosive densi-ty and adversely affects blasting stability.Additionally,the concentration of sodium nitrite,acting as the sensitizer,di-rectly influences both the foaming efficiency and the structural stability of the bubbles.For different matrix tempera-tures,there is an optimal concentration range to achieve ideal explosive density and detonation performance.Based on comprehensive experimental data,this study developed practical guidelines for sodium nitrite proportions across vari-ous matrix temperature ranges.These guidelines explicitly recommended specific sensitizer concentrations for low-to high-temperature conditions,providing quantitative references for field applications.Field validation confirmed that implementing this matching table and associated control techniques substantially enhanced the accuracy of emulsified explosive density regulation.This improvement not only boosted the effective release of explosive energy but also miti-gated safety risks,including density-related misfires,resulting in overall optimization of both blasting performance and operational safety.This study's findings offer valuable theoretical insights and practical applications for enhancing quality control in field-mixed explosives and systematically improving blasting performance.