基于氧气体积分数的高瓦斯采空区自燃“三带”的划分  

Division of Spontaneous Combustion "Three-Zone" in High-Gas Goaf Based on Oxygen Concentration

作　　者：宋万新[1] 杨胜强[1] 徐全[1] 

机构地区：[1]中国矿业大学煤炭资源与安全开采国家重点实验室,安全工程学院,江苏徐州221116

出　　处：《采矿与安全工程学报》2012年第2期271-276,共6页Journal of Mining & Safety Engineering

基　　金：国家自然科学基金项目(50834005);国际合作攻关项目(2008DFB70100)

摘　　要：用氧气体积分数法划分低瓦斯采空区自燃"三带"是目前在工程实践中应用最为广泛,也是最有效的方法。但是该方法没有考虑采空区的瓦斯体积分数的影响,在高瓦斯采空区的应用就受到了局限。根据化学动力学原理,通过理论推导,提出了基于氧气体积分数的高瓦斯采空区自燃"三带"的划分标准,并利用该标准对现场的高瓦斯采空区进行了划分。通过对采空区内遗煤温度的观测分析,验证了该划分标准的准确性,为高瓦斯矿井采空区早期自然发火预测及火区治理提供了依据。The oxygen concentration method is the most effective and most commonly used method in dividing spontaneous combustion ＂three zone＂ in low-gas goaf in engineering practice at present.But this method cannot be directly applied to high-gas goaf,because it neglects gas concentration.Based on the principle of chemical dynamics and theoretical derivation,the division standard of the spontaneous combustion ＂three zone＂ in high-gas goaf was proposed,and spontaneous combustion ＂three zone＂ in actual high-gas goaf was divided by this standard.The result was tested and verified by measuring and analyzing the temperature of residual coal in goaf.The study provides guidance for prediction and pre-vention of spontaneous combustion in high-gas goaf.

关 键 词：氧气体积分数 物理吸附 耗氧速度 高瓦斯采空区 自燃“三带” 

分 类 号：TD752[矿业工程—矿井通风与安全]