摘要
在常顺煤矿的15101工作面,采用U形通风系统时,上隅角区域常常出现瓦斯聚集的问题。为了解决这一问题,利用Fluent软件进行数值模拟,深入分析了在高抽巷条件下,U形通风系统对采空区瓦斯运移、采空区漏风以及上隅角瓦斯浓度变化的影响。通过模拟揭示了瓦斯在采空区的流动特性和聚集趋势,进一步研究提出了一种“U形通风+高抽巷+上隅角埋管”的瓦斯治理方式。通过调整埋管深度和抽采负压,探索出不同参数对瓦斯抽采效果的影响。研究结果表明,在上隅角埋管埋深为10 m左右时,上隅角瓦斯浓度最低,上隅角埋管的抽采负压为20 kPa条件下,抽采效果最佳。这些发现为现场实施上隅角埋管布置提供了科学的理论支持,有助于优化瓦斯治理措施,确保矿井作业的安全。
When using a U-shaped ventilation system in the 15101 working face of Changshun Coal Mine,gas accumulation often occurs in the upper corner area.To address this issue,this study utilized Fluent software for numerical simulation and conducted an in-depth analysis of the effects of a U-shaped ventilation system on gas migration,air leakage,and changes in gas concentration in the goaf and upper corner under high extraction conditions.The flow characteristics and aggregation trend of gas in goaf were revealed through simulation.We have proposed a gas control method that combines U-shaped ventilation,high extraction roadway,and upper corner buried pipes.By adjusting the burial depth and the negative pressure of gas extraction,the influence of different parameters on the gas extraction effect was explored.The research results show that the gas concentration in the upper corner was the lowest when the burial depth of the upper corner pipe was about 10 meters,and the extraction negative pressure of the upper corner pipe was 20 kPa,resulting in the best extraction effect.These findings provide scientific theoretical support for the implementation of upper corner’s buried pipe layout on site,which helps optimize gas control measures and ensure the safety of mine operations.
作者
李东东
高亚斌
张喜林
刘国强
张志强
LI Dongdong;GAO Yabin;ZHANG Xilin;LIU Guoqiang;ZHANG Zhiqiang(Yuxian Hengtai Changshun Coal Industry Co.,Ltd.,Shanxi Coal Transportation and Marketing Group,Yangquan 045199,China;School of Safety and Emergency Management Engineering,Taiyuan University of Technology,Taiyuan 030024,China)
出处
《陕西煤炭》
2025年第10期25-29,54,共6页
Shaanxi Coal
关键词
高抽巷
瓦斯治理
上隅角埋管
数值模拟
high extraction roadway
gas control
buried pipe in upper corner
numerical simulation
