对空气冲击波在90°拐角坑道内传播的到时规律及其影响因素进行了实验研究，在无量纲分析基础上建立了简化的工程模型。通过对实验数据拟合建立了可以对高能炸药在90°拐角坑道内爆炸产生的空气冲击波到达时间进行预计的公式，利用该公式可以进一步求得空气冲击波在90°拐角坑道内的传播速度。

The propagating regularity and its influencing matter of shock wave in a 90° bend tunnel were studied experimentally. On the basis of dimensional analysis, a simplified engineering model was built. Through collecting data gained from 4 experiments, a formula was proposed which can compute time of arrival in a 90° bend tunnel due to explosions from high explosive charges. This formula can also be used to compute velocity of shock in the 90° bend tunnel.