ABSTRACT
The detonation velocity of explosives is an important performance of explosives detonation (Lv et al. 2002). The modified ANFO is an industrial explosive without TNT, using other sensitizer powder. It is made up of a certain amount of modified ammonium nitrate mixed with wood flour and oil. The detonation velocity of explosives depends on the energy of explosives nature, as well as the relationship between the explosives formulation and the physical nature of the charged explosive, and on the charge density, charge diameter, and particle sizes of explosives components. A study by Wang et al. (2005) shows the relationship of the particle size of emulsion explosive with detonation velocity, which increases with the decrease in the particle size of the powdery emulsion explosive. Feng & Liu (2007), Yang et al. (2004), Chai & Zhang (2000) and Zeng et al. (2005) made preliminary studies of the detonation properties of the HMX and RDX explosives with different densities, showing that the detonation velocity increases with the decrease of the amount of explosives. There are some deficiencies in the above-mentioned papers, mainly due to the narrow particle size of election objects, which are concentrated on the micron and sub-micron level nitroamine explosives and multi-component explosives. As a consequence, the detonation properties of ammonium nitrate explosives whose particle size is larger than 200 μm are neglected, thereby making their research lack
systematization. Therefore, the purpose of this paper is to expand the scope of the relevant studies and have practical significance.
