瓦斯压力对煤与瓦斯突出冲击波传播的影响研究  

Study on the influence of gas pressure on the propagation of coal and gas outburst shock wave

作　　者：蒋安飞 孙东玲[2,3] 刘延保 曹偈[2,3] 杨雪林 戴林超[2,3] JIANG Anfei;SUN Dongling;LIU Yanbao;CAO Jie;YANG Xuelin;DAI Linchao(China Coal Research Institute,Beijing 100013,China;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]煤炭科学研究总院,北京100013 [2]瓦斯灾害监控与应急技术国家重点实验室,重庆400037 [3]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2期18-22,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：为研究瓦斯压力对煤与瓦斯突出冲击波传播的影响,自主研制了一套突出煤—瓦斯两相流模拟实验系统,开展了不同瓦斯压力条件下的煤—瓦斯两相流运移规律模拟实验,实现了对突出过程巷道内突出煤—瓦斯两相流运移的可视化监测。实验结果表明:煤与瓦斯突出是一个从突出口开始迅速向煤体内部发展的动力过程,期间瓦斯压力存在多次上下波动;突出过程中巷道内的冲击波超压呈现正压相与负压相交替变化的局面,同时冲击波超压特征值随初始瓦斯压力的增大而呈对数函数递增趋势;冲击波超压在巷道中传播是一个不断衰减的过程,前期衰减较慢,后期衰减加快。In order to study the influence of gas pressure on the propagation of coal and gas outburst shock wave,a set of coal-gas two-phase flow simulation experimental system was developed independently.The simulation experiments of coal-gas two-phase migration law under different gas pressure conditions were carried out,and the visual monitoring of coal-gas two-phase migration in the roadway during the outburst process was realized.The experimental results show that the coal and gas outburst is a dynamic process from the outburst to the interior of the coal mass,the gas pressure fluctuates up and down for many times during the period;during the outburst process,the overpressure of the shock wave in the roadway presents a pattern of alternating change positive pressure and negative pressure,and the characteristic value of shock wave overpressure increases with the increase of the initial gas pressure in a logarithmic function;the propagation of shock wave overpressure in the roadway is a process of constant attenuation.The attenuation is slow in the early stage and accelerates in the later stage.

关 键 词：煤与瓦斯突出 瓦斯压力 冲击波超压 衰减系数 模拟实验 

分 类 号：TD713+.1[矿业工程—矿井通风与安全]