基于正交设计的露天转地下空区变形预测及可靠度分析

基于正交设计的露天转地下空区变形预测及可靠度分析AbstractOrthogonal design, as a widely used statistical method, can systemat

基于正交设计的露天转地下空区变形预测及可靠度分 析 Abstract Orthogonaldesign,asawidelyusedstatisticalmethod,can systematicallyandefficientlyachievethepurposeofsurveyor experimentwithasmallnumberofsamplesunderthepremiseof ensuringtherepresentativenessofthesamples.Inthispaper, basedontheorthogonaldesign,wepredictthedeformationof open-pittoundergroundvoidsandanalyzethereliability.First,we describetheestablishmentandimplementationoforthogonal designinthisstudy.Then,weusethefiniteelementanalysis methodtosimulatethedeformationofopen-pittounderground voids.Also,weintroducetheprincipleandmethodofreliability analysisandperformreliabilityanalysisofthedeformationdata obtainedfromsimulations.Finally,theresultsofthedeformation predictionandthereliabilityanalysisarediscussed.Theresults showthattheorthogonaldesigncaneffectivelyreducethe numberofsamplesandimprovetheefficiencyofdatacollection whileensuringtherepresentativenessofthesamples.The deformationofopen-pittoundergroundvoidscouldbepredicted usingthefiniteelementmethod.Thereliabilityanalysiscouldhelp toevaluatethereliabilityofthedeformationpredictionandavoid theoccurrenceofdeformationaccidents. Keywords:Orthogonaldesign,Deformationprediction, Reliabilityanalysis,Finiteelementmethod,Open-pitto undergroundvoids Introduction Withthedevelopmentofmodernminingtechnology,the transitionfromopen-pitminingtoundergroundmininghas becomeanewtrend.Aswetransformfromopen-pitminingto undergroundmining,thesafetyofminingworkneedstobe ensured,andthedeformationofopen-pittoundergroundvoids needstobepredictedandcontrolled.Atpresent,thedeformation oftheopen-pittoundergroundvoidismainlypredictedbyfield monitoring,numericalsimulation,andtheoreticalanalysis methods(ChenandWang2018).Amongthem,numerical simulationisawidelyusedandeffectivemethodfordeformation