摘要
采空区遗煤自燃防治的重要前提是要准确掌握自燃"三带"的分布情况,这是采空区堵漏风、充填、注氮等技术实施的主要依据。同时,也为确定合理的回采推进度提供重要参考。采空区自燃"三带"的测试与划分是采空区自燃火灾防治的重要基础。本文是在此基础上利用数值模拟的方法,根据不同的划分指标对采空区自燃"三带"分布展开模拟与对比分析。结果表明,采用上限风速与下限氧浓度相结合的方法划分"三带"分布更加可靠。
The important promise is to accurately master the ＂three zones＂ distribution of coal spontaneous combustion for preventing the residual coal spontaneous combustion in goaf,and it is main basis for carrying out the technology of plugging air leakage,filling and injecting nitrogen.Simultaneously,it provides an important conference for confirming the reasonable face advance rate.The measurement and division of ＂three zones＂ of coal spontaneous combustion in goaf are important foundation for preventing the residual coal spontaneous combustion.In this paper,applying the method of numerical simulation,the distributions of ＂three zones＂ of coal spontaneous combustion are simulated,compared and analyzed.The results show that the reliable method is to divide the ＂three zones＂ of coal spontaneous combustion in goaf by combining two methods of upper air velocity and lower limit of oxygen concentration.
出处
《山西焦煤科技》
2012年第3期20-22,共3页
Shanxi Coking Coal Science & Technology
关键词
采空区
自燃“三带”
划分指标
数值模拟
Goaf
＂Three zones＂ of coal spontaneous combustion
Classification index
Numerical simulation
