辽宁工程技术大学学报（自然科学版）2024，Vol.43Issue(6)：641-647,7.DOI:10.11956/j.issn.1008-0562.20230485
采空区遗煤自燃"三带"及有害气体分布数值模拟
Numerical simulation study on the distribution of residual coal spontaneous combustion in goaf"three zones"and harmful gases
摘要
Abstract
In order to investigate the distribution of the"three zones"of spontaneous combustion of residual coal and the distribution of harmful gases in the goaf of Hanjiawan Coal Mine in Shaanxi,numerical simulation studies were conducted using"Fluent+UDF".The study focused on the numerical simulation of the distribution of the"three zones"of spontaneous combustion of residual coal and the flow field characteristics.The goaf is considered as a porous medium,and parameters such as porosity of porous media,viscous resistance and inertial resistance in porous media,oxygen consumption of residual coal oxidation,and harmful gas outburst from residual coal were calculated through user-defined equations.The results indicate that the residual coal in the working face and goaf can be divided into scattered zones,oxidation zones,and suffocation zones.When the oxygen concentration is 0.07≤C≤0.18 as the oxidation zone indicator,the width of the oxidation zone increases from 23 m to 40 m from the inlet side to the return side,and finally decreases to 13 m on the return side.The oxidation zone on the side of the return airway is smaller than that of the inlet airway,and the suffocation zone is the largest.As the height increases,the overall oxidation zone area moves towards the inlet direction of the air inlet roadway,and the coverage area first increases and then decreases.关键词
采空区"三带"/遗煤自燃/有害气体/数值模拟/危险区域Key words
"three zones"of goaf/spontaneous combustion of residual coal/harmful gas/numerical simulation/hazardous area分类
矿业与冶金引用本文复制引用
拜云龙,惠双琳,李慧刚,崔文利,王钊,孙维吉..采空区遗煤自燃"三带"及有害气体分布数值模拟[J].辽宁工程技术大学学报（自然科学版）,2024,43(6):641-647,7.基金项目
国家自然科学基金青年基金项目(52304029) （52304029）
辽宁工程技术大学学科创新团队资助项目(LNTU20TD-11) （LNTU20TD-11）
