复杂地质条件下井下巷道瓦斯运移规律研究  

Study on the gas transport law of underground roadway under complex geological conditions

作　　者：胡月强 周耀 HU Yueqiang;ZHOU Yao(Henan Institute of Geophysics Spatial Information Co.,Ltd.,Zhengzhou 450000,China)

机构地区：[1]河南省地球物理空间信息研究院有限公司,河南郑州450099

出　　处：《粘接》2023年第8期146-148,共3页Adhesion

摘　　要：煤与瓦斯突出发生使得短时间大量煤与瓦斯涌入采场空间,在复杂巷道内运移,直接摧毁巷道设施、矿井通风系统,引起瓦斯爆炸事故。研究瓦斯在巷道内的传播扩散规律,构建了突出瓦斯气体释放模型,借助Fluent数值模拟对突出瓦斯气体传播扩散过程进行模拟。结果表明,无风状态下的突出瓦斯表现为子口扩散运移方式,有风状态下表现为对流-扩散运移动,突出冲击波超压峰值与瓦斯压力成正比,在巷道内的传播速度明显大于空气声速,瓦斯运移速度小于冲击气流在巷道内传播速度,突出瓦斯压力越大,复杂巷道内传播速度越大,随着传播距离增大,突出冲击波超压峰值不断衰减。The occurrence of coal and gas outburst makes a large amount of coal and gas pour into theope space in a short time,moving in the complex roadway,directly destroying the roadway facilities and mine ventilation system,causing gas explosion accidents.This paper studies the law of gas propagation and diffusion in the roadway,constructs the model of outburst gas release,and simulates the process of outburst gas propagation and diffusion with the help of Fluent.The results show that the outburst gas in the condition of no wind is characterized by sub-outlet diffusion,while in the condition of wind it is characterized by convection-diffusion.The peak overpressure of outburst shock wave is proportional to the gas pressure;the propagation velocity in the roadway is obviously higher than the sound velocity of the air,and the gas migration velocity is lower than the propagation velocity of the impact gas in the roadway;the overpressure peak of the protruding shock wave is constantly decaying.

关 键 词：煤矿开采 高压瓦斯 冲击气流 运移规律 

分 类 号：TD82[矿业工程—煤矿开采] TQ53[矿业工程—矿山开采]