地表垂直爆破震动速度的数值计算

针对爆破震动速度计算中存在的问题，提出了分两步计算的方法，即先计算爆炸近区由炸药爆炸引起的冲击压力，再计算远端震动区的质点震动速度。并对动力学计算中的阻尼问题进行了初步讨论。利用本文提出的方法对岩粉、水和空气三种不同间隔装药结构下的不同质点处的震动速度进行了计算，计算结果与实测结果吻合较好。岩粉间隔装药条件下的计算地表垂直震动速度最大，水间隔装药次之，空气间隔装药最小。

Numerical calculation of ground vertical blasting vibration velocity

Aiming at the existing problem in blasting vibration velocity calculation, a calculation method by two steps is proposed, in which the shock pressure induced by explosion is first calculated in blasting near region, then the particle vibration velocity farther is calculated. The damping problem in dynamics calculation is discussed preliminarily. The vibration velocities of the different particles under the three different charge conditions with different intervals such as rock powder, water and air, are respectively calculated by means of the proposed method. The calculated ground vertical vibration velocity under the rock powder interval charge condition is maximum, that under the water interval charge condition is inferior and that under the air interval charge condition is minimum. Calculated results accord with the experimental results.