布设方式对避险设施承受爆炸冲击载荷的影响

发布时间：2018-06-28 21:16

本文选题：避险设施 + 布设方式　；参考：《煤矿安全》2017年07期

【摘要】：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。
[Abstract]:In order to study the influence of the layout on the explosion shock load of the safe escape facilities when the gas and coal dust explosion occurs in the underground, taking the lifebuoy as an example, the side of the tank is expanded in the middle, one side, under the same explosion source condition. In the typical layout mode of special chamber and connection lane, the finite element simulation calculation was carried out for the cabin subjected to shock wave load, and the characteristics of the impact load on each side of the cabin under different layout modes were compared and analyzed. The simulation results show that the shock wave overpressure in the front of the left side of the cabin is slightly larger than that in the center, and the overpressure at the other ends is basically the same, and the expansion arrangement can effectively reduce the shock wave pressure at the front end of the cabin. However, in the case of incomplete expansion, the back-end impact pressure will rise sharply due to the reflection of tunnel wall, the front pressure of the cabin in the special chamber layout mode will obviously decrease, and the back-end impact pressure will gradually increase. The layout of the connection lane changed the direction of the shock wave produced by the explosion source on the front surface of the cabin, which changed from the positive impact to the lateral stroke, which greatly reduced the impact pressure on the front surface, and the overpressure of the other end faces was relatively small. When the installation conditions are available in the underground, it is recommended to use the method of connecting roadway layout.
【作者单位】：安标国家矿用产品安全标志中心;
【分类号】：TD774

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