矿井瓦斯爆炸中的关键因素及其控制机理

The gas explosion is one of the most serious accidents in coal mine, and it is also one of the most complicated theory and experiment research subject. It is very important for safety production in coal mine that how to effectly prevent gas explosion. According to exist the main problem in research of gas explosion, this project research: the transmission law of flame and explosion wave, the influence of barriers, the change law of explosion wave feature parameter in gas explosion and some numerical simulation research also have been done in it. Though experiment research and numerical simulation research, the result indicates that the transmission speed of flame and explosion wave would be increased with the present of barriers in gas explosion, and with the increase of barriers, linear degree of transmission decreases and non-linear degree increases accordingly; the super pressure have the relationship with speed of flame, the flame thickness have the relationship with the present position of barrier and plastic film; when the tunnel has been branched and suddenly changed, turbulence would be produced, transmission speed of flame and explosion wave would be increased quickly; the change law of temperature in flame front has been found though setting up some theory mode of gas explosion and doing some numerical simulation of it. 15 papers and 4 postgraduates have been finished in this project research. This research result are very important to explore the mechanism of gas explosion, effectly prevent gas explosion and decrease the power of it in site.

本项目将综合运用多学，多技术手段，研究矿井瓦斯爆炸前动态、非稳定风流中的瓦斯爆炸浓度界限和瓦斯爆炸过程中动态、非稳定火焰与爆炸的传播规律及其控制机理；建立矿井瓦斯爆炸的理论模型，提出控制原理和方法。研究成果对制定矿井瓦斯爆炸的防范措施和规定，改善煤矿生产的安全生产状况具有重要意义。