ZHANG Jian-hua;LIANG Wei-tao;HUANG Gang;HAO Cheng-lei;

• 1:School of Resources and Environmental Engineering
• 2:Wuhan University of Technology
• 3:Green and Intelligent Mining Technologies Joint R&D Center
• 4:Explosives Co.

Abstract：

To address the absence of specialized explosives for mine presplitting blasting and excessive detonation velocity/power of conventional 32 mm emulsion explosives,this study proposed reducing the explosive diameter to moderate detonation characteristics. By combining critical diameter theory with numerical simulation analysis,a PVC tube charge model was developed in LS-DYNA. The detonation wave propagation was simulated using ignitiongrowth reaction-rate equations and fluid-solid coupling algorithms,with detonation-curve analysis verifying explosive stability. The BSS-1 intelligent ten-stage detonation velocity meter was employed to measure detonation velocities of emulsion explosives of different diameters,thereby enabling the determination of their critical diameter from experimental data. Results demonstrate strong agreement between simulations and experiments: stable detonation occurs at14 mm diameter,while failure occurs at 12 mm,establishing the critical diameter range as 12 ～ 14 mm. Additionally,when the diameter exceeds 14 mm,the detonation velocity exhibits a positive correlation with diameter increase. This study,cross-validation of numerical simulations and field experiments,identifies the critical diameter range for industrial emulsion explosives in mining applications,offering empirical support for optimizing presplitting blasting parameters and enhancing safety management.

Key Words： emulsion explosive;detonation characteristics;critical diameter;detonation velocity;numerical simulation

Abstract:

Keywords:

Foundation: 国家自然科学基金青年项目(No.52109165)~~

Authors: ZHANG Jian-hua;LIANG Wei-tao;HUANG Gang;HAO Cheng-lei;

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