Numerical Simulation on Migrating Laws of Mized Gas after Nitrogen Injection in Sealing Fire Zone of Coal Mine
Sealing fire zone and nitrogen injection are effective measures in most cases after fire breaks out in coal mine. However, this sometimes can cause gas explosion in fire zone. In general, it is only by sampling to analyze and to estimate the internal fire zone conditions and concentrations of mixed gas components during practical operations. This paper adopts FLUNET to simulate the fire development process of sealed fire zone after injecting nitrogen. The results show that nitrogen injection pushes methane effusing from laneway roof to fire zone while mixing, which causes methane explosion finally. The data are post-processed by specialized software tecplot. By comparing the concentration changes of nitrogen, methane and oxygen at different moments after nitrogen injection, the migrating laws of mixed gases is obtained. It comes to the reason of induced explosion through analyzing fire zone condition. These reasonable results verify the view of point of explosion induced by nitrogen injection and provide scientific basis for gas explosion prevention while injecting nitrogen after fire zone is sealed in practice.
sealing fire zone nitrogen injection gas ezplosion numerical simulation
Zhu Yingchun Zhou Xinquan Wang Haiyan Wang Bingjian
The State Key Lab Of Coal Resources and Safe Mining, China University of Mining and Technology, Beij Henan Polytechnic University, Jiaozuo 454000, China
国际会议
The 3rd International Symposium on Modern Mining & Safety Technology Proceedings(第三届现代采矿与安全技术国际学术会议)
辽宁阜新
英文
311-316
2008-08-04（万方平台首次上网日期，不代表论文的发表时间）