极松散细砂岩顶板下放煤工艺散体模型试验研究

@163.com1.21072560600m220m1460m2.6m580m9.8m720m7.0m1.027m3344m0.6m[1]2.[2][3]()1210721(20050290503)://[4]11/31/2abc1Fig.1Flowagefieldconfigurationofcoal-gangueforeachworkingprocedure4.222cm6cm://[5,6][7]3[8]3Table3Topcoalrecoveryratiowhensandstoneorganguereachrunningtopcoaljawsunderrunningdistance1.0m/39.5273.66060.62abc4Fig.4Flowagefieldconfigurationofcoal-gangueforlargefragmentaldimensiontop-coalafterrunningtop-coal5.4[9]7.272.193.806.79[1].[J]..2004427-9.[2].[J].1998274332-335.[3].[J].1999243261-265.[4],.[J].2002274337-341.[5][M].2002.[6].[M].1992.[7].[J].200324Supp443-446.[8],,,.[J].2004293260-263.[9].[J].200432461-63.ExperimentalResearchonRunningTop-CoalwithLooseMediumModelunderDead-UnconsolidatedSandstoneRoofHUANGBingxiangLIUChangyouWUFengfengWANGZhenSchoolofminingandsafetyengineeringTheKeyLaboratoryofMiningandSafety,CUMTXuzhouJiangsu221008ChinaAbstractOnthebasisofactualmeasuringandanalyzingthedistributioncharacteroftop-coalfragmentalsize,runningtop-coalwasstudiedforthecoalseamwithdead-unconsolidatedthinsandstoneroofbyloosemediummodelexperiment.Theeffectofdifferentrunningdistanceandtop-coalfragmentalsizeonflowcharacterofcoal-gangueandsand,andonconfusingganguedegreewereanalyzedduringrunningtop-coal.Theselectprincipleofrunningdistancewasgivenfordifferentcoal-ganguefragmentalsize.Thetestresultsshowthatlargerunningdistancehelptocontroldead-unconsolidatedthinsandstoneofcoalseamroofandreducesandratioofliberatedtop-coal.Keywords:dead-unconsolidatedthinsandstonetop-coalfragmentalsizesimulati[e-mail]