摘要
为了得到巷道瓦斯爆炸时的传播规律,利用大型试验巷道对不同质量、浓度的瓦斯-空气混合物的爆炸过程及传播规律进行了试验研究,分析了瓦斯爆炸时最大爆炸压力的时空变化特征、瓦斯爆炸火焰速度变化特征、火焰波及范围变化特征等规律,得出：1）最大爆炸压力的峰值较大,且随着瓦斯量的增加,出现最大压力峰值的位置距爆源点更近;2）最大爆炸压力呈现时间随与爆源的距离增大单调增加;3）随着瓦斯量增大,火焰传播速度绝对值明显增大,火焰传播速度最大点距爆源距离减小;4）火焰区长度可达原始瓦斯积聚区长度的3～6倍,但火焰传播距离并不与瓦斯量的增加成正比.研究所得结论可为矿井瓦斯事故的预防和治理提供参考.
In order to get the propagation laws of methane explosion in roadway,the process of the explosion and propagation characteristics of methane/air with different gas quality and consistency were studied by using the experiment in full-scale underground test gallery.Then the spatial distribution characteristics of maximum explosion pressure as well as the velocity of gas flame and the length of gas flame zone are analyzed when the methane/air hybrid exploding.The results show that 1） the peak value of maximum explosion pressure is higher,and the location of maximum explosion pressure is near to the explosion point when the gas content gets higher;2） the presentation time of maximum explosion pressure in the test point increases with the increase of the distance between the test point and explosion point;3） the Absolute value of velocity of gas flame increases evidently and the distance between the location of maximum velocity and explosion point decreases when the gas content gets higher;and 4） the length of the flame zone can be 3~6 times as long as the length of the original gas accumulation zone,but the increase of length of the flame zone is not in direct ratio to the increase of gas content.The conclusions can provide references for preventing and disposing of gas accidents in coalmines.
出处
《采矿与安全工程学报》
EI
北大核心
2009年第4期475-480,485,共7页
Journal of Mining & Safety Engineering
基金
国家"十一五"科技支撑计划项目(2007BAK22B04)
国家重点基础研究发展计划(973)项目(2005CB221506)
中国民航大学科研启动基金项目(08QD03X)
关键词
试验巷道
瓦斯爆炸
最大爆炸压力
火焰速度
火焰波及范围
test gallery
gas explosion
the maximum explosion pressure
velocity of gas flame
length of the flame zone
