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为了研究井下发生瓦斯煤尘爆炸时,布设方式对避险设施承受爆炸冲击载荷的影响,在相同爆源条件下,以救生舱为例,对其在居中、一侧、扩帮、专用硐室和联络巷典型布设方式下,舱体承受冲击波载荷进行了有限元模拟计算,对比分析了不同布设方式下舱体各端面所受冲击载荷特性。模拟计算结果表明,一侧布设方式舱体左侧前部冲击波超压较居中布设方式略有增大,其他各端面超压基本相同;扩帮布设方式可有效减小舱体前端冲击波压力,但在不完全扩帮情况下由于巷道壁反射作用,后端冲击压力会急剧上升;专用硐室布设方式舱体前端压力明显减小,后端冲击压力逐渐增加;联络巷布设方式改变了爆源产生的冲击波对舱体前端面的作用方向,由正面冲击变为侧向划过,使得前端面所受冲击压力大幅降低,其他各端面超压较小,在井下具备安装条件时,推荐采用联络巷布设方式。
In order to study the influence of laying ways on the impact load of hedging facilities during the blasting of gas and coal dust in underground mine, taking the rescue cabin as an example, And the contact lane typical layout mode, the impact load of the cabin subjected to finite element simulation was compared and analyzed under different layout modes of the impact on the end face of the load characteristics. The simulation results show that the overpressure of shock wave at the left front side of cabin with one side is slightly higher than that of the middle, and the overpressure at other ends are basically the same. The disassembly arrangement can effectively reduce the shock wave pressure at the front of the cabin, In the case of incomplete expansion, the back-end impact pressure will increase sharply due to the reflection effect of the roadway wall. The pressure at the front of the special chamber will be reduced obviously and the impact pressure at the back end will increase gradually. Of the shock wave on the cabin front end of the direction of action, from the frontal impact into the sideways across, making the front end face suffered a substantial reduction in the impact pressure, the other end of the overpressure is small, with underground installation conditions, the recommended contact Lane Layout method.