工程爆破起爆方向研究

201012陕西理工学院学报(自然科学版)Dec.2010264JournalofShaanxiUniversityofTechnology(NaturalScienceEdition)Vo.l26No.4[]1673-2944(2010)04-0032-06工程爆破起爆方向研究王庆国1,何章义2(1.,714000;2.,610031)[]利用ANSYS/LSDYNA软件,采用数值计算方法,从不同起爆方向,对单孔柱状连续装药爆破对孔壁岩石的影响作了比较分析,得出一些有参考价值的结论岩石爆破时,应尽量采用反向起爆方式,充分利用炸药能量,减少爆破对岩石造成的损伤[]数值计算;起爆方向;岩石;炸药[]TD233[]A:20100415:(1980),,,,,;(1984),,,,,,,,,,,,,,,,ANSYS/LSDYNA,,,1,,200cm150cm,112.0cm,100.0cm,50.0cm,50.0cm,1/2,100cm150cm,:,,(*MAT_HIGH_EXPLOSIVE_BURN):=1310kg/m3,D=5500m/s,PCJ=3.79GPa,JWL(*EOS_JWL)1:P=A(1-R1V)e-R1V+B(1-R2V)e-R2V+E0V(1)A,B,R1,R2,,1图1计算域示意图(单位:cm)1A/GPaB/GPaR1R2E0/GPaV0214.40.1824.20.90.154.1921.0112cm,,,12cm(*MAT_PLASTIC_KINEMATIC),22/g!cm-3/GPa/GPa/GPa2.745.50.24.641.6720.30.020.2ANSYS/LSDYNA,,3,(0,50),(0,100),(0,75),500s22.124图2反向起爆应力云图!33!4,2:,(),,,,,,,,∀#3,3,,,3,115,,,,图3正向起爆应力云图3:,,,,,,!34!()26图4中心起爆应力云图4:,,,,2.256图5速度时程曲线:3,,,,,,,,,,,,!35!4,图6加速度时程曲线,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,3,,:(1),,,,;(2),;(3),,,,!36!()26[][1],.[J].,2005,26(12):19261930.[2],.[J].,1998,10(1):4849.[3],.MBMS[J].(),2008,24(3):1014.[4],,,.0#[J].(),2008,24(4):1518.[5],,.[M].:,1999.[6].[M].:,1999.[7],.Midas[J].(),2010,26(2):2931.[8].[J].(),2009,25(2):6265.[9],,.ansys/lsdyna8.1[M].:,2005.[10],,,.[J].(),2008,24(4):1014.[11].LSDYNA[M].:,2003.[12],.[J].(),2008,24(3):3136.[13].[D].:,2007.[责任编辑:魏强]NumericalsimulationontheinfluenceofsectionformontunnelstructureWANGQingguo1,HEZhangyi2(1.ShaanxiRailwayInstitute,Weinan714000,China;2.SouthwestJiaotongUniversity,Chengdu610031,China)Abstract:ByusingtheANSYS/LSDYNAanalysissoftwareandnumericalcalculationmethod,andonthebasisofdifferentinitiationdirections,theeffectofsinglecolumncontinuouschargeonrocksaroundblastholeblastingwasanalizedandsomevaluableconclusionsweredrawn.Whenrockswereblasted,reversedetonatingshouldbetriedtouse,explosivesshouldbeutilized,andthedamageofrockblastingshouldbereduced.Keywords:numericalcalculation;initiationdirection;rock;explosive!37!4,