不同煤自燃特性参数下采空区“三带”分布规律的研究  

Research on "Three Zone" Distribution Rule of Goaf under Different Coal Spontaneous Combustion Properties

作　　者：朱红青[1,2] 和超楠[2] 秦晓峰[2] 杨成轶[2] 

机构地区：[1]中国矿业大学(北京)煤炭资源与安全开采国家重点实验室,北京100083 [2]中国矿业大学(北京)资源与安全工程学院,北京100083

出　　处：《矿业研究与开发》2014年第3期54-57,共4页Mining Research and Development

基　　金：国家自然科学基金资助项目(51074168);国家自然科学基金煤炭联合基金资助项目(U1261214)

摘　　要：为了掌握不同煤自燃特性参数对采空区"三带"分布的影响,利用煤氧化模拟实验系统对开滦集团钱家营矿、唐山矿、荆各庄矿9#、荆各庄矿11#四个煤样进行了绝热氧化实验。基于实验数据,对各煤样不同温度下的耗氧速率和放热强度进行了计算,并利用Fluent软件模拟不同煤自燃特性参数条件下采空区"三带"分布情况。结果表明,氧化带宽度最大的是唐山煤样80.3m,最小的是钱家营矿煤样24.2m。结合理论分析得出,耗氧速率越大,采空区"氧化带"的宽度越大,而放热强度大,一定程度上使"氧化带"范围增大。同时结合各煤样的最小自然发火期确定了相应煤层的最小推进速度,对于防治采空区自然发火具有重要作用。In order to master ＂three zone＂ distribution rule of goaf under different coal spontaneous combustion properties, by coal oxidation simulation system, the adiabatic oxidation experiments were carried out on four coal samples from Qianjiaying mine, Tangshan mine, 9^# and 11^# areas of Jinggezhuang mine. Based on experimental results, the oxygen consumption rate and heat emitting intensity of coal samples at different temperatures were calculated and the ＂ three zones＂ distribution under different coal spontaneous combustion parameters was simulated with Fluent software. The simulation results showed that the largest oxidation zone was Tangshan samples at the width of 80.3 m. and the smallest was Qianjiaying samples at the width of 24.2 m. Combining with theoretical analysis, it concluded that the greater of oxygen consumption rate, the wider of oxidation zone and the greater of heat emitting intensity, to some extent the larger of oxidation zone scope. Furthermore, according to the shortest coal spontaneous combustion time, the minimum advancing speed of working face was determined, which played an important role for preventing goal spontaneous combustion.

关 键 词：采空区 自燃“三带” 绝热氧化 数值模拟 最小推进速度 

分 类 号：TD82[矿业工程—煤矿开采]