Research on the protection mechanism of methane explosion in underground space by flexible construction  

作　　者：Xianqi Duan Yulong Duan Zishuang Zhang Jun Long Yaqiao Yang Rui Lang 

机构地区：[1]College of Safety Engineering,Chongqing University of Science and Technology,Chongqing 401331,China [2]Chongqing Key Laboratory for Oil and Gas Production Safety and Risk Control Technology,Chongqing 401331,China

出　　处：《Defence Technology(防务技术)》2025年第4期169-183,共15页Defence Technology

基　　金：supported by the National Natural Science Foundation of China(Grant No.52274177);Science and Technology Research Program of Chongqing Municipal Education Commission(Grant No.KJZD-K202401501);Chongqing Graduate Student Research Innovation Program(Grant No.CYS240800);The Science and Technology Innovation Project for Graduate Students of Chongqing University of Science and Technology(Grant No.YKJCX2420702).

摘　　要：Urban growth has promoted the use of underground spaces,where explosion accidents can be catastrophic.In this study,we investigated the effect of placing flexible construction in front of rigid obstacles on methane explosion protection by using an experimental platform and adjusting the blockage rate and spacing of the obstacles.It aims to reduce the risk of gas explosions in urban underground spaces.The results of the study show that the flame propagation peak speed and peak overpressure are reduced with the decrease in the blocking rate of the flexible obstacle when the blocking rate of the flexible obstacle is less than or equal to the blocking rate of the rigid obstacle,with the decrease in the spacing,the better the protection effect of the methane explosion.When the blockage rate of the flexible obstacle is greater than the blockage rate of the rigid obstacle and spacing is less than the height of the flexible obstacle,rigid and flexible obstacles are connected as a whole,increasing the strength of the explosion.This study can provide a theoretical basis and scientific guidance for optimizing rigid and flexible object hybrid layouts and methane explosion protection technology in urban underground spaces.

关 键 词：Explosion protection Flexible construction Urban underground space Methane explosions 

分 类 号：X932[环境科学与工程—安全科学]