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:1005-7854(2005)04-0001-0321,2(11,100083;21(),100083):2(CS),,2,,,,255:2;;;;:TD353+.5:AOPTIMALPARAMETERSELECTIONOFCEMENT2WATERGLASSTWO2SHOTGROUTINGLIUYu2xiang1,LIUHui2peng2(11SchoolofCivilandEnvironmentalEngineering,UniversityofScienceandTechnologyofBeijing,Beijing100083,China;21SchoolofMechanics,Architecture&CivilEngineering,ChinaUniversityofMiningandTechnology(Beijing),Beijing100083,China)ABSTRACT:Withitscontrollablesolidifyingvelocityandvastrawmaterialsource,cement2waterglass(CS)two2shotgroutinghasfoundwideapplicationsinmanygeotechnicalprojects1Theauthor,basedontheprojectofmaintainingtunnelcollapseinLinglongGoldMine,madegelexperimentondifferentvolumeratioofcementgrouttowaterglass1Accordingtotheexperimentresult,theauthorfoundthattheinitialgelvelocitychangednottoomuch,butthefinalgelvelocitychangedalot,andfurthermore,thevelocityofgelwithvariedvolumeratiopresentedaninflexioninitscurvewithasharplyrisingtendencyaftertheinflexion1Basedonthisfindtheideawasformedthatselectinggroutingmixtureratioparameternearinflexionwasfavorabletotheprojectinviewofeconomy1TheideawasverifiedintheconstructionoftheprojectofmaintainingtunnelcollapseinLinglongGoldMine1Theresulthasgreatreferencevalueforthesimilarprojectinthefuture1KEYWORDS:Cement2waterglass;Two2shotgrouting;Mixtureratio;Initialgel;Finalgel:2005-08-19:,,1,2(CS),,,35Be,11,11,(),,144200512MINING&METALLURGYVol.14,No.4December2005,,,,22:Ca(OH)2+NaOnSiO2+mH2OCanSiO2mH2O+NaOH(1),:3CaOSiO2+nH2O=2CaOSiO2(n-1)H2O+Ca(OH)2(2),1,,1Table1Seltimeofdifferentmixtureratioofcement2waterglass/Be()11/s/s10175/s/s10150/s/s10125/s/s391064187447729571235281537602149193483525122855194452632722152648173710254242014256518429213301816257218431130373171127521438925420161025511533825330015102447153176842158141040981742146051342131025113124366231620121226792011415360102640111029812915625106710189410102314017760131531133264910232022312411321271150648143083324144425226291195002023,1117,39Be,425,113111,2(39814Be),3s91s;21s19500s4,,,,:;;,;,,1Fig11Comprehensiverelationchartofseltimeunderdifferentconcentrationofwaterglass,1m10m,21,,,2Fig12Seltimecurvesofdifferentconcentrationofwaterglass2(a),11,,9Be,2(b)(c),1017510150,11Be13Be,,2(d),U,16Be,,,,,,,,,,4:;;,,,,11,16Be,10125,:(1)16Be,,(2),()(3),3s,300s,,;,,,,255,5(1),,15,CS(22)3:265155%68189%,3134%;SiO28131%3190%,4141%98150%,320039,()100t,,,BF2T2044200571,2500t,6615%512(),2003,BF2T16BF2T10,6515%SiO28%,6819%SiO24%,9815%4513900t,22,BF2T20BF2T102916%,67159%10156%82124%4514,22,BF2T10BF2T62004467%,1215%11114%,SiO28%4%,318,1136,99180%4515,2003,22,BF2T16,60%66%,23%19153%6,BF2T,,:1,,,1[M]1:,1994121[J]1,2002():45-5013,,1SiO2[J]1,2004(3):17-1914,,1[J]1,2005(2):1-51(3),,(2)CS,,,;,:11[M]1:,2001121[J]1,1997,6(04):33-34131[J]1,2000,36(03):194-197141[J]1,2003,29(13):47-4815,1SC[J]1,1997(01):44-45122