岩石乳化炸药TNT当量系数的试验研究

Experimental Investigation on the TNT Equivalence Coefficient of a Rock Emulsion Explosive

为了研究岩石乳化炸药的TNT当量系数,采用试验与数值模拟相结合的方法,研究了岩石乳化炸药在空气中自由场和通道外爆炸时的TNT当量系数。根据试验结果,得到了两种情况下爆炸冲击波压力峰值与比例距离的关系曲线,确定了在空气中自由场和通道外爆炸时岩石乳化炸药的等压力TNT当量系数分别为0.609和0.582.在此基础上,将岩石乳化炸药换算成TNT对两种试验进行了数值模拟,得到的压力时程曲线与试验结果基本吻合,表明文中确定岩石乳化炸药TNT当量系数的方法是可行的,其结果对于岩石乳化炸药爆冲击波参数的计算具有参考价值。

The TNT equivalence of rock emulsion explosives which exploded in free air and outside of corridor conditions was investigated experimentally and numerically. The relationships between the peak pressure and scaling distance for the explosives explosions in free air and outside of corridor conditions were fitted by the test data, and the corresponding TNT equivalent coefficients of the rock emulsion explosives were 0. 609 and 0. 582, respectively. Besides, the numerical simulation of the tests was conducted, in which the charge weight of the rock emulsion explosives was converted to TNT by the equivalent coefficient obtained in test. The pressure-time histories predicted by the numerical simulation agree quite well with the test data. It is shown that the proposed approach for the determination of the TNT equivalent co- efficient of rock emulsion explosives explosions in free air and outside of corridor conditions is feasible. The TNT equivalence of rock emulsion explosives given in this paper can be used in the calculation of shock wave parameters of rock emulsion explosives.