瓦斯爆炸冲击波对通风设施破坏情况数值模拟影响因素分析

Influencing Factors Analysis on Numerical Simulation of Destruction Status of Ventilation Facilities Caused by Gas Explosion Shock Wave

为研究瓦斯爆炸冲击波对通风设施的破坏情况,本文采用LS-Dyna有限元分析软件,建立矿井巷道数值计算模型,研究0.6、1.2、2.4m^(3)3种不同爆炸气体体积,3和6m 2种不同厚度风门,两固支两简支和四边固支2种边界条件下,爆炸冲击波对风门动态作用效果的影响。研究表明:3种体积梯度中,0.6m^(3)混合爆炸气体对风门在速度上的影响最大;2种不同厚度风门中,厚度小的风门上单元获得的速度更大;2种不同边界条件中,两固支两简支较四边固支结构失效的情况更严重。经对比可知,影响效果从大到小依次为爆炸气体体积、边界条件、风门厚度。

In order to study the destruction status of ventilation facilities caused by the gas explosion shock wave,in this paper,LS-Dyna finite element software was used to establish the numerical calculation model for mining tunnel and study the influence of dynamic effect to the damper caused by the explosion shock wave under the conditions of three explosion gas volumes of 0.6,1.2 and 2.4m 3,two kinds of thickness damper of 3 and 6m,and two kinds of boundary support forms of 2 completed clamped supports and 2 simple supports and 4 completed boundary supports.The result showed that the 0.6 m^(3) mixed explosive gas had the greatest influence on the speed of the damper among the three volume gradients of 0.6,1.2 and 2.4 m^(3);that the damper with a smaller thickness had a greater speed in the two different thick dampers;and that the failure in 2 completed supports and 2 simple supports was more serious than four boundary completed supports.By comparing the above three situations,it was concluded that the explosive gas volume has the greatest impact,followed by boundary conditions and thickness of the damper.