强爆炸冲击作用下坑道内准静态气压分析

针对强爆炸作用下密闭坑道内TNT爆炸准静态压力特性问题，基于能量守恒和理想气体状态方程建立了准静态压力计算模型，并在试验坑道内开展了系列TNT内部爆炸试验.结果表明，爆炸产物二次燃烧发生化学反应对约束爆炸准静态压力有明显的影响，当药量体积比Q/V较小时，理论计算模型能较好的估算坑道内爆后准静态气压，Q/V为0.234 k g·m^-3和0.463 k g·m^-3的理论计算值与实测值的相对误差仅为4.6%和1.4%.；当Q/V增大时，坑道内大气环境参加二次燃烧的爆炸产物比例越小，使得准静态气压增大比例降低.

Quasi-Static Pressure Analysis in Tunnels Under Strong Blast Impact

Aiming at the quasi-static pressure characteristics of TNT explosion in closed tunnel under strong explosion, a quasi-static pressure calculation model based on energy conservation and ideal gas state equation is established in this paper, and a series of TNT internal explosion tests are carried out in the test tunnel. The results show that the quasi-static pressure of confined explosion is obviously affected by the chemical reaction of secondary combustion of explosive products. When Q/V is small, the theoretical calculation model could better estimate the quasi-static pressure after tunnel implosion. When Q/V is 0.234 k g·m^-3 and 0.463 k g·m^-3, the relative error between the theoretical calculated value and the measured value is only 4.6% and 1.4%. With the increase of Q/V, the proportion of explosive products participating in secondary combustion in the atmosphere of the tunnel decreases, and the proportion of quasi-static pressure increases decreases.