INFLUENCE OF PHYSICAL PROPERTIES OF AMMONIUM NITRATE ON THE DETONATION VELOCITIES OF ANFO (Ⅱ) - Influence of the pore diameter and volume-

摘要

In order to obtain a better understanding of the non-ideal detonation behaviour of ammonium nitrate based explosives, detonation velocities of ANFO (ammonium nitrate and fuel oil) prepared with different kinds of ammonium nitrate (AN) were measured in steel tubes. In this series of test six kinds of AN were used and the influence of the pore diameter and volume of the AN particle on the detonation velocity of ANFO was investigated. It was found that the pore diameter and volume had a strong influence on the detonation velocities of ANFO. And in case ANFO sample which were prepared with AN that had the same pore diameter and volume were tested, the highest detonation velocity (3.85 km/s) was observed when used the smallest particle diameter (4 μm). This value corresponded to 75% of the ideal detonation velocity, which was theoretically predicted by the TIGER code with the JCZ3-EOS.