顶板巷瓦斯抽采量对漏风流场的扰动效应研究

doi:10.16265/j.cnki.issn1003-3033.2017.07.010

摘要/Abstract

摘要： 为深入研究顶板巷瓦斯抽采量对漏风流场的扰动效应,以河南义马耿村煤矿13190工作面实际情况为例,通过数值模拟与实测相结合的方法分析瓦斯抽采诱导漏风规律。首先,对现场实际工况下的漏风流场进行数值模拟及分析;其次,根据示踪气体实测结果,验证了模拟的有效性;最后,分析不同抽采量下工作面的漏风分布情况。研究结果表明:漏风风流进入采空区后呈现立体迁移和“一源两汇”的分布特征;随着顶板巷抽采量的增加,工作面向采空区的漏风区域逐渐向回风巷方向扩展,最低风量点位置向回风巷方向移动,采空区气体向工作面的涌出效应逐渐减弱,工作面向采空区的漏风量逐渐加大。

关键词: 顶板巷, 瓦斯抽采, 流场, 漏风量, 煤自燃

Abstract: In order to master the disturbance effects of the gas drainage volume of upper tunnel on air leakage field, the actual conditions of 13190 working face in Yima Gengcun Coal Mine was taken as an example, the rules of the air leakage were analyzed by means of numerical simulation and in-suit measurement. Firstly, the leakage flow field was solved by numerical simulation under the condition of upper tunnel gas drainage. Secondly, according to the tracer gas measured, the results of the simulation and the measured results were analyzed, and the reliability of the simulation was verified. Finally, the leakage flow distributions under different drainage volumes were analyzed. The results show that the air leakage flow into the gob is characterized by both three-dimensional migration and a source and two sink. With the gradual increasing of upper tunnel drainage volume, the air leakage area of working face and the minimum air volume point gradually move to the return air lane direction, the effect of goaf gas emission on the working face gradually weakens, and the amount of air leakage to goaf increases gradually.

Key words: upper tunnel, gas drainage, flow field, air leakage volume, coal spontaneous combustion

中图分类号:

X936

褚廷湘, 李品, 滕飞. 顶板巷瓦斯抽采量对漏风流场的扰动效应研究[J]. 中国安全科学学报, 2017, 27(7): 53-58.

CHU Tingxiang, LI Pin, TENG Fei. Study on disturbance effects of gas drainage volume of upper tunnel on air leakage field[J]. China Safety Science Journal, 2017, 27(7): 53-58.

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