深孔爆破数值模拟及其在煤矿顶板弱化中的应用-李春睿

3412Vol.34No.12200912JOURNALOFCHINACOALSOCIETYDec.20090253－9993200912－1632－0511212111.1000132.100013“”.AUTODYN..TD235.33A2009－03－139732005CB221504“”2006BAK03B061980—[e-mail]deep-holeblastinganditsapplicationinmineroofweakenLIChun-rui1KANGLi-jun12QIQing-xin12MAODe-bing1XUGang11.CoalMining＆DesigningBranchChinaCoalResearchInstituteBeijing100013China2.ChinaCoalSocietyofRockMechanicsandSupportProfessionalCommitteeChinaCoalResearchInstituteBeijing100013ChinaAbstractAnalyzedtherockbreakageprocessinboreholeblastingputforwardthe“dynamicandstaticpress”breakageprincipleofrockboreholeblasting.UsedAUTODYNsoftwaremakeboreholeblastingnumericalsimula-tioneducedtheboreholeblastingofrockbreakageprocessandanalyzedtheboreholenon-couplingchargeblastinglawachievedacompletesetoftechnologybycombinationoftheoreticalanalysisnumericalsimnlationandtotheminingroofweakensiteimplementation.Atlastverifiedthecondusionofstudybydrillingobserveon-siteblastingcracksandmonitorthepressurelaws.Keywordsboreholeblastingroof-weakenrockpressuremonitoring1...2.11.13.2、“”.1..12.D.F.Coates19704.2.5..H.K.Kutter6T.N.Hagan“”7.“”8.、.“”.9.1Fig.1Blastingdamagingeffect1.2.、3101.1..11.Rc=0.2ρsc2pσ()c4ρsD2/8/σ0r槡b1Rcmρskg/m3cpm/sσcPaDm/sσ0Parbm.2.Rp=ρsD2rc/rb+pi8σ[]t1/2rb2RpmpiPaσtParcm.3..12Rs=1.5～2.03槡qRsmqkg/m3.22.1.33612009344900120..100mm2401500mm1480..2.2P－alpha13.JWL14.JWLA=54.09GPaB=0.937GPaR1=4.5R2=1.10Ω=0.35E=2.1GPaρ=1000kg/m3D=6000m/s.10m..2.31.2.2a0.1ms2b2b、.2Fig.2Singleboreholerockblastingprocess3Fig.3Non-couplingchargeconceptualdrawing2.、、310..2468mVonMises44ky.VonMises.、..324.43m279.6MPa2、.－－43611242468mVonMisesFig.4VonMisesstressandradialvelocitycurveswithtime、60%～70%IVb.16.75m..ZL－10060mm250mm×250mm.1.2430mm4221mm.AUTODYN284000mm4922mm.450mm..25m18、2415m10m.15.1Table1Theboreholeparameters/m/°/°/m/kg/mA130.238.922204010.2A228.129.62220408.1B132.336.634224410.3B230.328.334204010.3C149.530.271367213.5C248.224.771357013.2D149.531.178367213.5D248.225.578357013.25Fig.5Advancedboreholelayout4000mm64m7.64mⅣb34mⅠ.41“”53612009346Fig.6Detectinstrumentpeep-hole7Fig.7ObservedblastingcracksAUTODYN..2AUTODYN.1.J.1999244350－354.XieHepingWangJiachenChenZhonghuietal.HardthickcoalseamcavingblastfragmentationtechnologyresearchJ.JournalofChinaCoalSociety1999244350－354.2.J.200726S13522－3527.QiQingxinLeiYiLiHongyanetal.Deep-holeblastingintoprocktorockburstpreventiontheoryandpracticeJ.ChineseJournalofRockMechanicsandEngineering200726S13522－3527.3.J.20067181－182.ZhaoXintaoChengGuihai.ThefailuremechanismofrockblastingfourtheoriesJ.WesternProspectingWorks20067181－182.4CoatesDF.DynamicRockMechanicsM.SeattleRockMechanicsPrinciplesPress1970.5.J.199718273－78.ZongQi.Thequasi-staticcharacteristicsofblastinggasinrockJ.RockandSoilMechanics199718273－78.6KutterHKFairhurstC.OnthefractureprocessinblastingJ.Int.J.ofRockMech.Min.Sci.197182181－202.7HaganTN.RockbreakagebyexplosivesA.Proceedingsofthenationalsymp.onrockfragmentationC.Adelaide19731－17.8LangLCFavreauRF.Amodernapproachtoopenpitdesign＆analysisA.74thAnnualMeetingC.I.M.M.C.1972.9.M.2004.10DcikRichardAFletchgrLarryRD’AndreaDennisV.ExplosivesandblastingproceduresmannalM.WashingtonD.C.UniversityPressofthePacific1983.11.J.2001202144－147.DaiJun.ColumnarblastingofrockcrushingandfracturecirclecalculationJ.JournalofLiaoningTechnicalUniversityNaturalScienceEdition2001202144－147.12.M.2002.13.M.1999.14CenturyDynamicInc.AutodyntheorymanualM.CaliforniaAmericaANSYSCompanyPress1998.6361