CAJ | 학술논문

为探究平煤十矿己15－24080机巷掘进工作面煤层合并分叉线附近突出瓦斯流在交叉巷道中的传播规律与运移特征,结合现场实际构建了仿真模型,分析了突出瓦斯的逆流特性与爆炸危险区的分布情况。研究表明：突出瓦斯流在风流、浓度扩散和惯性力的作用下运移,随着瓦斯气流逼近巷道交叉区域,其影响范围先增大后减小,瓦斯峰值浓度也随之降低；当突出瓦斯最大初始速度为40 m/s,持续时间为5 s 时,产生了瓦斯逆流扩散现象,最大影响范围为25 m；突出瓦斯在交叉巷道中流经气流方向紊乱和压力较低的涡旋区域时,浓度曲线表现出转折分布特征,部分瓦斯呈现逆流－回流规律。
위탐구평매십광기15－24080궤항굴진공작면매층합병분차선부근돌출와사류재교차항도중적전파규률여운이특정,결합현장실제구건료방진모형,분석료돌출와사적역류특성여폭작위험구적분포정황。연구표명：돌출와사류재풍류、농도확산화관성력적작용하운이,수착와사기류핍근항도교차구역,기영향범위선증대후감소,와사봉치농도야수지강저；당돌출와사최대초시속도위40 m/s,지속시간위5 s 시,산생료와사역류확산현상,최대영향범위위25 m；돌출와사재교차항도중류경기류방향문란화압력교저적와선구역시,농도곡선표현출전절분포특정,부분와사정현역류－회류규률。
To explore the law of diffusion and migration characteristics of gas flow in the in-tersection roadway with the gas outburst occurrence in the near of coal seam merger and split line in the advancing face of 615-24080 machine roadway of No. 10 Coal Mine of Pingdingshan coal in-dustry company,the simulation model was constructed combing with the actual situation,the characteristics of adverse outburst gas flow and the distribution of explosive hazardous area were analyzed. The studies show that the outburst gas flow migrates under the effect of air flow and concentration diffusion and the action of inertia force,as the gas airflow approaches the intersec-tion area of roadway,the its influence scope first increases then decreases,the gas peak concen-tration also decreases;the adverse gas flow phenomenon happens and the maximum adverse gas flow scope is 25 m when the maximum initial velocity of gas flow is 40 m/s and duration time is 5 s;the outburst gas flows airflow direction disorder and low pressure vortex area and the break in the concentration curve,the partial gas appears adverse flow-return flow characteristics.