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高抽巷抽采对采空区漏风规律的影响研究
供稿: 高建良;刘明信;徐文 时间: 2018-11-19 次数:

作者:高建良;刘明信;徐文

作者单位:河南省瓦斯地质与瓦斯治理重点实验室(省部共建国家重点实验室培训基地)河南理工大学安全科学与工程学院六盘水师范学院矿业工程系

摘要:掌握高抽巷抽采对采空区漏风规律的影响,可为控制采空区漏风量和选取降低采空区遗煤自燃危险性的方法提供指导。利用Fluent软件对有、无高抽巷抽采瓦斯两种情况下的采空区漏风量和采空区内风速分布进行了数值模拟研究。结果表明:没有高抽巷抽采瓦斯时,沿工作面长度方向,由工作面进风端头到接近工作面中部范围内漏风风流由工作面流向采空区;有高抽巷抽采瓦斯时,沿工作面长度方向,几乎全程范围内漏风风流由工作面流向采空区,且有高抽巷抽采瓦斯时漏入采空区的总风量比没有高抽巷抽采时增加了54.7%。

基金:国家自然科学基金资助项目(51174079);教育部“长江学者和创新团队发展计划”创新团队项目(IRT1235);国家重点基础研究发展计划“973”项目(2012CB723103);

关键词:高抽巷;采空区;漏风规律;

DOI:10.16186/j.cnki.1673-9787.2015.02.001

分类号:TD728

Abstract:For the purpose of mastering the influence of high-position extraction tunnel on the air-leakage law in goaf, it can offer a guidance for reducing the air-leakage in goaf and choose the methods of reducing goaf coal spontaneous combustion risk. The air-leakage, wind-speed distribution and the influence of air-leakage on gas distribution in goaf are simulated by fluent software. The result of investigation shows that (1) when there is no high-position tunnel for gas extraction, the wind current of air-leakage will flow from working face to goaf on a scale from the air inlet end of working face to the middle of working face along the direction of working face length; (2) when there is a high-position tunnel for gas extraction, the wind current of air-leakage will flow from working face to goaf on a scale of almost the whole working face along the direction of working face length, and the total air-leakage volume increases 54. 7%, compared with that without a high-position tunnel for gas extraction.

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