Experimental study on inhibiting the gas and coal dust explosion by water mist in tube with obstacle
The ordinary water mist has well affected on suppression and extinguishment flame, but the ability of physical extinguishment is influenced by the surrounding environment. The roadway in coal mine is very complex. So the related experiments need be considered. The light-sized experiment of the water mist is built for taking mine environment analog simulation with the pipeline. It is suppressed by medium pressure water mist the experiment of gas and coal dust explosion propagation in the alone laneway. Obstacle is laid on the different positions, whose blockage ratio is 30％. Then we compare the effects of suppression on gas flame with the different location. The experimental results indicate that the obstacle is placed in the front, middle and end of mist area. The propagation velocity of gas flame is different. The gas content and blockage ratio is set low in experiment. It can achieve better inhibition effect that the obstacle is placed in the middle or end of water mist area. Thus, if the obstacle cant be avoided in water mist system, the designer must consider the position of obstacle. It can enhance the suppression effect of water mist.
water mist obstacle flame propagation velocity
Li Zhen-feng Cao Shao-long An An Hu Peng
School of Safety Science and Engineering, Henan Polytechnic University, Jiaozuo 454003, China Zhengzhou Coal Administrative bureau, Zhengzhou 450015, China
国际会议
The First International Symposium on Mine Safety Science and Engineering (首届矿山安全科学与工程学术会议)
北京
英文
461-466
2011-10-27（万方平台首次上网日期，不代表论文的发表时间）