In order to study the effect of the fineness of ammonium nitrate on the performance of ammonium amine explosive,a kind of colloidal explosive was preparated with hexamethylenetetramine as the combustible agent.The porous granular am-monium nitrate was broken,where the different fineness was distinguished through 20,40,60 and 80 mesh screens.The vis-cosity of the matrix of ammonium amine explosive mixed with different fineness of ammonium nitrate particles was tested,and the detonation speed and fervency of the explosive were tested as well as the storage stability of the explosive.The results show that when the fineness of ammonium nitrate increases from 0-20 mesh to more than 80 mesh,the mixing uniformity of the ammonium explosive matrix increases,and the initial viscosity of the matrix increases from 92828mPa·s to 148637mPa·s.The matrix viscosity gradually decreases with the increase of shear time.The detonation speed of the explosive increases from 3 569 m/s to 4 316 m/s,while the intensity is increased from 26.00mm to 30.50mm,which means the energy release is more concentrated,and the impact force on the surrounding medium is increased.For the ammonium explosive stored for 2d and 120d,respectively,the detonation velocity reduction is less than 5％.It shows that the increase of ammonium nitrate fineness can improve the detonation performance and storage stability of ammonium amine explosive.
explosion mechanicsfineness of ammonium nitrateammonium amine explosiveviscositydetonation velocityferocityindustry explosivehexamethylenetetramine
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