Channel effect of the modified powdery mixture of ammonium nitrate and fuel oil

Chun-ping Wu1,2), Lian-sheng Liu3), Xu-guang Wang2), Yong Liu4), and Yin-jun Wang2) 1) School of Civil and Environmental Engineering, University of Science and Technology Beijing, Beijing 100083, China 2) Beijing General Research Institute of Mining and Metallurgy, Beijing 100044, China 3) College of Resource and Environmental Engineering, Jiangxi University of Science and Technology, Ganzhou 341000, China 4) Ordnance Industry Planning Project Institute of China, Beijing 100053, China

摘 要：The modified powdery mixture of ammonium nitrate and fuel oil (MPANFO) is a new breed of industrial explosives developed years ago in China. As one of the important properties of an industrial explosive, the channel effect of MPANFO was reported in this paper. A series of experiments were conducted to determine the channel effect of MPANFO. The blasthole diameter range was estimated to avoid the channel effect of MPANFO. Three empirical formulae for predicting the detonation length of MPANFO were provided in terms of the channel effect. Experiments and theoretical analysis indicate that the channel effect of MPANFO is very serious. The reason why the channel effect of MPANFO is worse than that of other industrial explosives is explained at a theoretical level. In addition, some properties of MPANFO, such as sympathetic distance, detonation velocity and brisance, are determined.

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