近距离下位煤层大断面开切眼顶板加固技术何富连

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