煤礦坑道鉆探用外平鉆桿疲勞試驗(yàn)及壽命預(yù)測研究.pdf

1、分類號：分類號：學(xué)校代碼：學(xué)校代碼：UDCUDC：密級：級：博士學(xué)位論文博士學(xué)位論文煤礦坑道鉆探用外平鉆桿疲勞試驗(yàn)煤礦坑道鉆探用外平鉆桿疲勞試驗(yàn)及壽命預(yù)測研究及壽命預(yù)測研究StudyonFatigueTestLifePredictionofOuterFlatDrillPipefDrillinginCoalMines研究生：生：曹明導(dǎo)師：師：石智軍石智軍研究員研究員學(xué)科專業(yè)：學(xué)科專業(yè)：礦產(chǎn)普查與勘探礦產(chǎn)普查與勘探研究方向：研究方向：鉆探技

2、術(shù)與裝備鉆探技術(shù)與裝備培養(yǎng)單位：培養(yǎng)單位：煤科總院西安研究院煤科總院西安研究院煤炭科學(xué)研究總院2014年5月煤炭科學(xué)研究總院博士學(xué)位論文IIAbstractAsanimptantcomponentofgallerydrillingequipmentthedrillpipeisthenecessarytoolfdrillingoperationinundergroundcoalmines.Itsfatigueperfmanceinflue

3、ncesdirectlythesafestableoperationofdrillingingallery.Aimingatafewofresearchoninvalidationduetofatigueofouterflatdrillpipelackofnecessarymeansoffatiguetestthepaperonthebasisofanalysissummingupthepreviousresearchtheexisti

4、ngproblemsedφ63.5mm?1500mmfrictionweldedouterflatdrillpipeasresearchobjecthasobtainedthefollowingresearchresults:（1）Accdingtothemovementstatusofdrillpipeduringdrillinginundergroundcoalminestheundergroundspacecodinatesyst

5、emwasestablisheddifferentialgeometryequationdifferentialequationofequilibriumgeometryequationconstitutiveequationequationofverticalhizontalbendingdefmationhalfwavebendingequationofdrillpipewerederived.Thefmulafcalculatio

6、nofthemaximumbendingstressofdrillpipewasdeducedfromtheprincipleofstrutstabilization.Theconstraintrelationofbeholedrillpipewasanalyzed.（2）Themethodsuitabletoanalysispredictionoffatiguelifeofdrillpipewasoptimized.Themechan

7、ismofthegenerationextensionoffissuresduetofatigueofdrillpipewasanalyzedindetail.Onthebasisofthemethodfpredictionofextensionoffissuresthefmulaffatiguelifeofdrillpipewasderived.（3）Onthebasisofthecalculationequationoffatigu

8、elifeofdrillpipethetfiniteelementsoftwareANSYSWkbenchwasusedtoputfwardaemulationmethodffatiguelifeofdrillpiperealizingemulationoffatigueofdrillpipeduringdrillingprovidingconditionfpredictionoffatiguelifeofdrillpipe.（4）Ac

9、omposedfatiguetesterfrealtsionofdrillpipeofgreatcapacitywasdevelopedfillingthegapinChinaabroad.Thetqueofthetestercanbeadjustablefrom300Nmto15000Nmrotationspeedis0800rpmwithsteeplesadjustment.Thetestedlengthofdrillpipeis9

10、000mm，providingtestingapproachfanalysisoffatigueofproductswithlongaxis.（5）Thefatiguetestofthreesetsofdrillpipewasconductedunderlimitconditions.Investigationofdrillpipeusageinthreecoalmineswascarriedout.Theresultsverified

11、theaccuracyofemulationmethodoffatigue，checkedtheresearchresultsonpredictionoffatiguelifeofdrillpipeestablishingagoodbasisfpredictionoffatiguelifeofdrillpipesofdifferentspecifications.Keywds：OuterflatdrillpipeFatiguelifeF