搜索
1211111．1000832．1000831001“－”UDEC。2．5～4m。。TD353A1003－496X201312－0100－04ＲoofＲeinforcementTechnologyofLargeSectionOpen－offCutinLowerCoalSeamofCloseDistanceHEFu－lian12LIUZhi－yang1WANGHuan1YINShuai－feng1ZHANGGuang－chao11．SchoolofＲesourcesandSafetyEngineeringChinaUniversityofMiningandTechnologyBeijing100083China2．StateKeyLaboratoryofCoalＲesourcesandSafeMiningCUMTBeijing100083ChinaAbstractForsolvingthesupportproblemsofthincrushingroofwhentunnelingthelargesectionopen－offcutatthesecondtimein1001fullymechanizedcavingfaceofonecertaincoalminebaseonthedispersion－blockmodelofoverlyingstrataitbuiltUDECdiscreteelementnumericalcalculationmodelofopen－offcutinlowercoalseamofthegoafdrewthestressanddisplacementcurveofsurroundingrockofthelargesectionopen－offcut．Thenumericalsimulationresultsindicatedthattheroofrockstresswasmorecon-centratedinfrontofcoalwallregionof2．5to4mafterfinishingthefirsthorizontalexcavation．Inordertoensureeffectivecontrolforroadwayroofduringsecondtunnelingofopen－offcutitwasnecessarytofocusonstrengtheningthisregion．Combinedwiththeactualgeologyandengineeringconditionitusedmalisangroutingtechnologytoreinforcetheroofofthisregion．Keywordsclosedistancecoalseamlargesectionopen－offcutnumericalsimulationmalisangroutingreinforcement512340052010CB2268022010YZ02SKLCＲSM10B08、、、。。1－3。4。1001。1100110#2m70～120m1．0m75～95m0．4～0．6m9#。4m2．8m。DZ252．5m·001·4412·DOI:10.13347/j.cnki.mkaq.2013.12.034180mm2。2“－”“－”5－8。10019#。“”2。。3UDEC3．1“－”UDEC。1。170m40m。10#60°×120°0．25m×0．25m0．25m×0．25m。－。。10#1。3．29#、10#2。。210#x3。3x26～30m9#30～34m10#34～50m36．5～38m2．5～4m37．5m3．5m5．2MPa3．5MPa1．49。44．1·101··2013－12、、。N129－11。1N/g·cm－31．010～1．0401．220～1．240/MPa·s130～260240～3591120℃/s65～9020℃/s110～1502N/MPa≥60/MPa≥35/MPa≥12/MPa≥4．5≥1．2～2．5/℃≤14024h4．22．5～4m。、、42mml3000mm12°1400mm1600mm。10#h1300mm。4。4h=l×sin12°－h1=323．7l1l1=l×cos12°=2934．444．32500mm5。54．4212500mm4MPa570～75m95～120m1275～95m3MPa49。4．51001。6。6。。51“－”·201·4412·。2UDEC。32．5～4m。4。1．M．200884－90．2．M．200814－19．3．D．20074－6．4．J．200732101061－1065．5．J．2010352190－193．6．J．20112143－144．7．J．200833133－37．8．M．200628－30．9．J．2010164－65．10．J．19983276－279．11．J．20063436－10．1966－。2013－01－05檵檵檵檵檵檵檵檵檵檵檵檵檵檵檵檵檵檵檵檵檵檵檵檵檵檵檵檵檵檵檵檵檵檵檵檵檵檵檵檵檵檵檵檵檵檵993131mm142mm7#。1．J．2009360－61．2．J．20121711－236．3．J．2000S158－61．4．J．1999Z1164－166．5．J．2011421038－40．6．J．20072241－5．7．J．201136121990－1995．1986－。2013－03－04·301··2013－12