木垫板对锚杆支护效果影响的试验研究林健

4612Vol.46No.12201812CoalScienceandTechnologyDec．2018121212121．1000132．100013、。1h23%23%27%38%90%。TD323A0253－2336201812－0074－05ExperimentalstudyoninfluencingeffectofwoodenplateonboltsupportLINJian12ZHOUYiqun12WANGZhengsheng12SHIYao121.CoalMiningandDesigningDepartmentTiandiScienceandTechnologyCo．Ltd．Beijing100013China2.CoalMiningandDesigningＲesearchBranchChinaCoalＲesearchInstituteBeijing100013ChinaAbstractAimingatthecommonphenomenonofaddingwoodenplateunderthebolttraysofmanyminesinChinathelaboratorytestmethodwasusedtorevealtheinfluenceofwoodenplateonthepre－stressofboltbyusingtheself－developedboltsupportstressfieldtestrig．Thepre－stresslosspreloadtorqueconversionandpre－stressdistributionoftheboltundertheactionofthewoodenplatewerestudiedandcomparedwiththemetaltrays．Theresultsshowthatinthedryenvironmentthefirsthourlossrateoftheboltprestressofthewoodenplateisupto23%andthecoefficientofthepreloadtorqueconverttopre－stressoftheboltisreducedby23%．Therangeofpre－stressfieldsformedbyboltsupportinthesurroundingrockisgreatlyreducedtheareaofeachstresscontourisreducedby27%onaverageandthepeakofpre－stressisreducedby38%．Itisalsopointedoutthatintheenvironmentwherethehumidityofthemineexceeds90%theinfluenceofthewoodenplateontheworkingloadoftheboltwillbegreatlyincreased．Keywordsboltsupportpre－stresswoodenplatepre－stressloss2018－04－08DOI10.13199/j.cnki.cst.2018.12.0122017YFC06030062016ZYQN0031969—。[e-mail]2018461174－78.01－2。。。GB/T35056—2018《》“”、“、47201812”。。3、、、、、4－67－89－10、11121314－15－、－16、17。。。。1。18－20。。××=3000mm×2000mm×2000mm41000mm500mm。12。2①②。ZHC－35XYJ－2。1Fig.1Boltprestressedfieldtestbench2Fig.2Sensorslayout215720181246+2、、。2400mm、22mm。1200mm。3。3Fig.3Woodenplateinstallationposition33．1ZHC－3527h+24。4Fig.4Curveofboltpre-stressbeforeandafteraddingwoodenplate427h105．41kN103．50kN1．9%30min30min。+16h30%27h102．70kN69．19kN32．63%。+1h1h+。1h+5。50s10．73%5min16．11%1h23．58%。。5+1hFig.5Curvesofboltpre-stresswithwoodenplatein1hour3．2+1－6。6－Fig.6Preloadtorque－prestressconversioncurves61Ｒ210．9960．25。Ｒ220．969672018120．1923．21%400N·m28．64%。。1－Table1Preloadtorque－pre－stressconversiontest/N·m/kN5014．387．890．290．1610022．2718．810．220．1915032．0031．460．210．2120047．8937．080．240．1925062．8141．950．250．1730076．3265．950．250．2235092．6569．190．260．20400107．5776．760．270．193．3。100kN7。0～1200mm1200～2400mm。7100kNFig.7Pre－stressdistributionofboltsupportbeforeandafteraddingwoodenplateunder100kNpre－stress－0．72MPa－0．44MPa38．89%－0．1、－0．05、－0．02MPa0．285、0．666、1．287m20．175、0．503、1．035m238．60%、24．47%、19．58%27．55%。。411h23%27h32%1．9%。20．1923%。400N·m107．57kN76．76kN28%。3。38%－0．10、－0．08、－0．02MPa27%。490%。5、、。Ｒeferences1．M．2007．2．J．20141961－6．JUWenjun．Developmentandprospectofanchored－boltsupportingtechnologyinChinesecoalmineJ．CoalMiningTechnology20141961－6．3．J．2007327673－678．KANGHongpuJIANGTiemingGAOFuqiang．Effectofpreten-sionedstresstorockboltingJ．JournalofChinaCoalSociety2007327673－678．77201812464．J．201540111－23．KANGHongpuLINJianWUYongzhengetal．Mechanicalper-formancesandcompatibilityofrockboltcomponentsJ．JournalofChinaCoalSociety201540111－23．5．J．20162131－6．KANGHongpuYANGJinghe．LaboratoryexperimentandanalysisonmechanicalperformancesofrockboltcomponentsJ．CoalMin-ingTechnology20162131－6．6．J．20123718－16．KANGHongpuWUJianxing．AnalysisonmechanicalperformanceandsupportingfunctionofrockboltplatesJ．JournalofChinaCoalSociety．20123718－16．7．J．200833121329－1335．KANGHongpu．AnalysisontypesandinteractionofstressfieldsinundergroundcoalminesJ．JournalofChinaCoalSociety．200833121329－1335．8．J．20143981521－1529．KANGHongpuJIANGPengfeiCAIJiafang．TestandanalysisonstressfieldscausedbyrockboltingJ．JournalofChinaCoalSoci-ety20143981521－1529．9．J．201635112237－2247．LINJianSHIYaoSUNZhiyongetal．Largescalemodeltestonthedistributioncharacteristicsoftheprestressedfieldofend－an-choredboltsJ．ChineseJournalofＲockMechanicsandEngineer-ing201635112237－2247．10．J．201520587－9222．LINJianWANGYangYANGJingheetal．Analoguesimulationofsupportingstressfieldcharacteristicofsingleanchoredboltun-derdifferentworkingloadsJ．CoalMiningTechnology201520587－9222．11．J．201217511－13．LINJian．Developmentofnew－stylehigh－efficiencyantifrictiongasketforanchoredboltJ．CoalMiningTechnology201217511－13．12．D．2007．13．D．2015．14．D．2018．15．J．201722646－4933．ZHOUYiqunLINJianWANGZhengshengetal．Numericalsim-ulationstudyonprestressedfieldcharacteristicsofend－anchoredboltincompositerockJ．CoalMiningTechnology201722646－4933．16．D．2017．17．J．201641122999－3007．WANGXiaoqingKANGHongpuZHAOKeetal．Numericala-nalysisofbondingstiffnessforsupporteffectivenessofpre－stressedboltsJ．JournalofChinaCoalSociety201641122999－3007．18．J．20032291430－1436．LIZhongkuiLUDarongZHONGYuanshanetal．Developmentandapplicationofnewtechnologyfor3DgeomechanicsmodeltestoflargeundergroundhousesJ．ChineseJournalofＲockMe-chanicsandEngineering20032291430－1436．19HUDSONJAHAＲＲISONJP．EngineeringrockmechanicsanintroductiontotheprinciplesM．2009．20．．200423223785－3789．CH