空腔及其耦合水袋抑制瓦斯爆炸实验研究  

Experimental study on gas explosion suppression with cavity and its coupled water bag

作　　者：周辉 穆朝民[1,2] 李重情[1,2] 刘伟[1,2] 黄海健 ZHOU Hui;MU Chaomin;LI Zhongqing;LIU Wei;HUANG Haijian(Key Laboratory of Safe and Effective Coal Mining (Anhui University of Science and Technology), Ministry of Education,Huainan Anhui 232001,China;State Key Laboratory of Mining Response and Disaster Prevention and Control in Deep Coal Mines, Anhui University of Science and Technology,Huainan Anhui 232001,China;Institute of Applied Mechanics,Anhui University of Science and Technology,Huainan Anhui 23001,China)

机构地区：[1]安徽理工大学煤矿安全高效开采省部共建教育部重点实验室,安徽淮南,232001 [2]安徽理工大学省部共建深部煤矿采动响应与灾害防控国家重点实验室,安徽淮南,232001 [3]安徽理工大学应用力学研究所,安徽淮南232001

出　　处：《中国安全生产科学技术》2019年第9期26-32,共7页Journal of Safety Science and Technology

基　　金：国家自然科学基金项目(11472007);安徽省高校自然科学研究项目(KJ2017A092)

摘　　要：为探索一种新型瓦斯抑爆技术,设计宽径比分别为1.5,2.5,4的矩形空腔体,并基于自行搭建的长36m,管径为200mm的大型瓦斯爆炸实验系统,通过在管网中铺设不同宽径比空腔体结构开展抑爆实验。此外依托支护简单的宽径比为2.5的空腔体,在腔体内填充不同质量水袋开展实验,以期进一步提高空腔体抑爆性能。结果表明:对于长径比为2.5、高径比为1的空腔体在实验宽径比范围内均能在一定程度上抑制瓦斯爆炸强度;随着腔体宽径比的增加,截面面积变化率增大,火焰及冲击波超压峰值衰减幅度越大,抑爆效果越佳;空腔耦合抑爆剂水能提高腔体的抑爆效果,在实验范围内较纯空腔可使火焰抑制率最大提高70%,超压峰值抑制率最大提高263%。In order to develop a new technology for suppressing the gas explosion,a rectangular cavity with different width-diameter ratios of 1.5,2.5 and 4 was designed.Based on the self-built large gas explosion experimental system with a length of 36 m and a pipe diameter of 200 mm,the explosion suppression experiments were carried out by laying the cavity structures with different width-diameter ratios in the pipe network.In addition,relying on the simply supported cavity with a width-diameter ratio of 2.5,the experiments were carried out by filling the water bags with different masses in the cavity to further improve the explosion suppression performance of the cavity.The results showed that the gas explosion intensity could be suppressed to some extent within the range of the experimental width-diameter ratio for the cavity whose dimension was 2.5 in length-diameter ratio and 1 in height-diameter ratio.As the width-diameter ratio of cavity increased,the change rate of the cross-sectional area increased,and the greater the attenuation amplitude of the flame and peak overpressure of shock wave,the better the effect of explosion suppression.The cavity coupling the explosion suppressant of water could improve the explosion suppression effect of the cavity.In the experimental range,the flame suppression rate increased by 70% to the maximum,and the inhibition rate of peak overpressure increased by 263% to the maximum compared with the pure cavity.

关 键 词：瓦斯爆炸 空腔体 抑爆 宽径比 压力峰值 爆炸火焰 

分 类 号：X936[环境科学与工程—安全科学] TD712.7[矿业工程—矿井通风与安全]