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为了研究瓦斯突出冲击波穿过直角拐角和障碍物时的动力演化特征,利用计算机模拟了突出冲击波影响下巷道内压力、速度和瓦斯浓度分布。结果表明:拐角会对冲击波压力造成弹射,在波阵面处分别形成高压区和低压区,相应产生漩涡区和加速区。冲击波在障碍物附近湍流强度增加,在第2障碍物附近形成二次加速。随着障碍物距离和数量的增加,障碍物对前端冲击波强度影响越发减小,障碍物对冲击波的激励影响主要在后部。在巷道施工过程中应尽量避免巷道内的刚性突出物,并消除不必要的设备堆积。
In order to study the dynamic evolution characteristics of gas outburst shock waves passing through right angle corners and obstacles, the distribution of pressure, velocity and gas concentration in the roadway under the influence of salient shock waves was simulated by computer. The results show that the corner will eject the shock wave pressure and form the high pressure area and the low pressure area respectively at the wave front, and the vortex area and acceleration area will be generated accordingly. The shock wave increases in intensity near the obstacle and forms a second acceleration near the second obstacle. As the distance and number of obstacles increase, the impact of obstacles on the front shock wave intensity decreases more and the impact of obstacles on the shock wave is mainly in the rear. In the process of roadway construction should try to avoid rigid protrusions in the roadway, and eliminate unnecessary equipment accumulation.