瓦斯爆炸冲击波在并联巷道中传播特性的数值模拟

摘要

运用AutoReaGas软件模拟了煤矿井下掘进工作面发生瓦斯爆炸时冲击波向临近采煤工作而的传播规律.研究结果表明：冲击波在巷道中传播时，超压峰值和最高温度不断减小，到回风巷交叉口时，两条相向传播的冲击波产生叠加效应，使超压和温度明显增大；最高温度沿着巷道的变化规律与超压峰值基本相同，两个并联采煤工作而对应测点的超压峰值和最高温度基本相同.在冲击波叠加的分岔口附近是破坏较严重的区域，应采取相应的预防措施，减少瓦斯爆炸带来的损失.%Abstract: Propagation laws of shock wave to adjacent coal face were simulated by AutoReaGas software when gas explosion occurred in underground heading face of coal mine. The results show that peak overpressure and maximum temperature are decreased continuously as shock waves propagate in the roadway. At the intersection of return airways, the two shock waves of face-to-face propagation can form superposition effect, and then peak overpressure and maximum temperature are increased significantly. The change law of maximum temperature along roadway is the same as peak overpressure. Peak overpressures and maximum temperatures in corresponding points of two parallel coalfaces are almost the same. Some relevant preventive measures can be taken to reduce the loss caused by gas explosion near the bifurcation port where is destroyed seriously because of the superposition of shock waves.