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20053()Mar.2005283JournalofChongqingUniversity(NturlScienceEdition)Vol.28No.3:1000-582X(2005)03-0095-033,,,(,400030):,,,,,(50100mm)(50%),:;;:U455:A1,,,,,,,[1-6]2,,,,,2[2-4],,,12.1db3545mm2.221.;2.1:,,,,,,(1)aa=(1220)db(1)600700mm,,,450500mm,400mm2.3W,,,,,,,3:2004-11-22:(50334060);:(1970-),,,,,WW=QCqaL(2)(2)Q;a;L;Cq,,f=410,Cq0.20.5kg/m3,W=700800mm,,500600mm,800900mm,600700mm2.4m,aWm=a/W,,,,,aWm=aW=0.81.0m1,a,W,,,a=W,m=1m=0.5,2a=W,m=0.81.012[7]1Rb/MPaBa/mmW/mma/Wq/kgm-1601.251.505507007008500.81.00.300.3530601.502.004506006007500.81.00.200.30302.002.503005004006000.50.80.070.152Rb/MPaBa/mmW/mma/Wq/kgm-1601.251.506007007008000.71.00.200.3030601.502.004005005006000.81.00.100.15302.002.504005005006000.70.90.070.122.5,,3m,()452.6Q=qaWL(3)(3)q,kg/m3;L,m;:qL=QL=qaW(4)2.7BB=1,B1,,,,,,,2,3245mm,B=1.52.02B2.8,,,,1)NN1=BL-Ba+1(5)69()2005(5)B,m;a,m;BLm,BL(6)BL=cs(6)(6)S;c,c=3.862)N2N2,N2N2=Q-N1LqLQ0(7)(7)Q,kg,Q=qsL;qL,kg/m;q,kg/m3;;Q0,,kgQ0=LkmQL(8)k,k=0.60.7,k=0.50.6;QL,kg;l,m3)NN=N1+N2=N1+Q-N1LqLQ0=QQ0+N1(1-LqLQ0)=qsLkQL+cs-Ba+11-qLmkQL(9)3,,,,:1),50mm150mm,150mm2):80%,65%,50%3),,,;,4)2,,100150mm4:1),,,,2),,,,3),,,:[1].(2)[M].:,2002.[2],,,.[M].:,1999.[3].[M].:,2000.[4].[M].:,1992.[5],.[J].,2002,28(8):66-67.[6].[J].,2001,27(11):30.[7]JTJ042-94.[S].ReasonableSmoothBlastingFactorUsedinTunnelGUYi2lei,LIXiao2hong,DUYun2gui,WANGXin2fei(Resources&EnvironmentalScienceCollege,ChongqingUniversity,Chongqing400030,China)Abstract:Thefactoftunnelsmoothblastingisthosereduceoverbreakandminimizefracturingoftherockatthebound2aryofanexcavation.Theselectrulerandassuredmethodofsmoothblastingparameterarediscussed,andthequalitycheckstandardofthesmoothblasting,basedontheunderandover2break(515mm),thecircumferentialholemarkratio(50%)androckfragment,arefound.Agoodbenefitisgottenastheseusedinonetunnel.Keywords:smoothblasting;minimumresistline;compressionfactor()79283: