低变质厚煤层采空区自然发火“三带”数值模拟研究与应用  

Numerical simulation research and application of spontaneous combustion‘three zones’in goaf of low metamorphic thick coal seam

作　　者：赵林 Zhao Lin(College of Safety Science and Engineering,Liaoning Technical University,Huludao 125000,China;Xinjiang Tongtai Coal Industry Co.,Ltd.,Turpan 838100,China)

机构地区：[1]辽宁工程技术大学安全科学与工程学院,辽宁葫芦岛125000 [2]新疆同泰煤业有限公司,新疆吐鲁番838100

出　　处：《煤炭与化工》2025年第4期117-123,共7页Coal and Chemical Industry

摘　　要：为准确分析低变质厚煤层回采过程中,采空区自然发火“三带”的演化规律,采用PFC-Fluent相结合的方法,以沼和泉煤矿一号井11E5-304综放工作面为研究背景,利用PFC颗粒流模拟软件模拟采空区覆岩的垮落和空隙率分布,将得到的空隙率分布数据导入Fluent数值模拟软件中,通过所建立的采空区模型,以氧气浓度作为煤自然发火采空区“三带”划分依据,得出采空区自燃“三带”范围,并与现场实测对比。结果表明,采用PFC-Fluent相结合的方法测定的自然发火“三带”与现场实测相接近,并计算工作面最小推进速度为0.69 m/d,用以指导煤矿生产工作,该研究对防止采空区自然发火有理论指导和实际应用意义。In order to accurately analyze the evolution law of spontaneous combustion‘three zones’in goaf during the mining process of low metamorphic thick coal seam,the PFC-Fluent method was used to simulate the caving and voidage distribution of overlying strata in goaf by using PFC particle flow simulation software.The obtained voidage distribution data were imported into Fluent numerical simulation software.Through the established goaf model,the oxygen concentration was used as the basis for the division of‘three zones’in coal spontaneous combustion goaf.The range of spontaneous combustion‘three zones’in goaf is obtained and compared with field measurement.The results show that the‘three zones’of spontaneous combustion measured by the combination of PFC-Fluent method is close to the field measurement,and the minimum advancing speed of the working face is calculated to be 0.69 m/d,which is used to guide the coal mine production work.It has certain theoretical guidance and practical application significance for preventing spontaneous combustion in goaf.

关 键 词：采空区自燃“三带” 数值模拟 空隙率 遗煤自燃 低变质程度煤 厚煤层 

分 类 号：TD752[矿业工程—矿井通风与安全]