煤粉粒径对突出冲击波传播特征的影响  

Influence of coal fine particle size on propagation characteristics of outburst shock wave

作　　者：蒋安飞 孙东玲[1,2] 刘延保 杨雪林[1,2] 曹偈 戴林超 JIANG Anfei;SUN Dongling;LIU Yanbao;YANG Xuelin;CAO Jie;DAI Linchao(State Key Laboratory of the Gas Disaster Detecting,Preventing and Emergency Controlling,Chongqing 400037,China;CCTEG Chongqing Research Institute,Chongqing 400037,China)

机构地区：[1]瓦斯灾害监控与应急技术国家重点实验室,重庆400037 [2]中煤科工集团重庆研究院有限公司,重庆400037

出　　处：《矿业安全与环保》2021年第5期13-16,22,共5页Mining Safety & Environmental Protection

基　　金：国家自然科学基金面上项目(51974358,51774319);重庆市自然科学基金(面上)项目(cstc2019jcyj-msxmX0531);重庆市九龙坡区科技计划项目(2020-02-008-Y)。

摘　　要：为研究煤粉粒径对煤与瓦斯突出冲击波传播特征的影响,自主研制了一套突出粉煤—瓦斯两相流模拟实验系统,开展不同煤粉粒径条件下的突出模拟实验,突出过程中实时监测模拟巷道不同位置冲击波超压随时间的变化规律。实验结果表明:在各监测点冲击波超压呈现正相与负相交替变化的格局,冲击波超压峰值与突出腔体内煤粉粒径呈正相关关系;突出冲击波在巷道内的传播速度也受煤粉粒径的影响,即煤粉粒径越小,冲击波传播速度越小,且冲击波传播速度沿着巷道呈衰减趋势。In order to study the influence of coal fine particle size on propagation characteristics of coal and gas outburst shock wave,a set of outburst fine coal-gas two-phase flow simulation experiment system was independently developed,and outburst simulation experiments under different coal fine particle size conditions were carried out.In the process of outburst,the variation of shock wave overpressure with time in different positions of simulated tunnel was monitored in real time.The experimental results show that the shock wave overpressure presents a pattern of alternating positive and negative pressure phases at each monitoring point,the peak value of the shock wave overpressure is positively correlated with the particle size of the coal in the outburst cavity;the propagation speed of the outburst shock wave in the tunnel is also affected.The impact of the particle size of the pulverized coal,that is,the smaller the particle size of coal fine,the smaller the shock wave propagation velocity,and the shock wave propagation velocity shows a decay trend along the roadway.

关 键 词：煤与瓦斯突出 煤粉粒径 冲击波 超压 传播速度 相似模拟 

分 类 号：TD713[矿业工程—矿井通风与安全]