第42卷第4期2023年7月Vol.42No.4Jul.2023JOURNALOFHENANPOLYTECHNICUNIVERSITY(NATURALSCIENCE)河南理工大学学报(自然科学版)不同煤厚综放工作面合理放煤工艺数值模拟研究刘闯1,李化敏2,马占元3,张侦锐1(1.河南工程学院资源与安全工程学院河南郑州451191;2.河南理工大学能源科学与工程学院河南焦作454000;3.晋能控股集团,山西大同037003)摘要:同忻煤矿8202综放工作面顶煤回收率较低,为提高煤炭资源采出率,利用CDEM建立沿工作面倾向的数值模型,模拟研究综放工作面顶煤厚度分别为4.0,8.0,12.0m时不同放煤工艺的放煤过程,分析煤矸分界面和顶煤回收率的变化规律,优化不同顶煤厚度条件下放煤工艺参数。结果表明,顶煤一次放出的厚度越大,各放煤口放煤量差异越大,放煤过程中煤矸互层越严重,煤矸分界面越混乱,顶煤回收率越低。对比可知,8202综放工作面采用三轮顺序放煤工艺时顶煤回收率最高。关键词:综放工作面;煤厚;放煤工艺;顶煤回收率;数值模拟中图分类号:TD82文献标志码:A文章编号:1673-9787(2023)4-40-7NumericalsimulationstudyonreasonabletopcoalcavingtechnologyinlongwalltopcoalcavingworkingfacewithdifferenttopcoalthicknessLIUChuang1,LIHuamin2,MAZhanyuan3,ZHANGZhenrui1(1.SchoolofResourceandSafetyEngineering,HenanUniversityofEngineering,Zhengzhou451191,Henan,China;2.SchoolofEnergyScienceandEngineering,HenanPolytechnicUniversity,Jiaozuo454000,Henan,China;3.JinnengHoldingGroup,Datong037003,Shanxi,China)Abstract:Therecoveryrateoftopcoalin8202longwalltopcoalcaving(LTCC)workingfaceofTongxincoalmineislow.Inordertoimprovetherecoveryrateofcoalresources,anumericalmodelalongtheslopeoftheworkingfacewasestablishedbyCDEMnumericalsimulationsoftware.Differenttopcoalcavingtech‐nologywereusedtosimulatethetopcoalcavingprocessoftheLTCCworkingfaceunderthetopcoalthick‐nessof4.0,8.0,12.0m,thechangesinthecoal-gangueinterfaceandtherecoveryrateofthetopcoalwerecomparedandanalyzed,andthereasonablecoaldrawingprocessparametersunderdifferenttopcoalthick‐nesswereoptimized.Theresultsshowedthatthegreaterthethicknessofthetopcoalcavingatonetimewas,thegreaterthedifferenceintheamountoftopcoalcavingateachcavingwindo...