综采工作面双尘源多场耦合模型及仿真模拟研究

综采工作面双尘源多场耦合模型及仿真模拟研究综采工作面双尘源多场耦合模型及仿真模拟研究

摘要：针对综采工作面双尘源问题，本文提出了一种双尘源多场耦合模型，旨在准确描述综采工作面双尘源的复杂物理过程及其相互作用。首先，本文对综采工作面双尘源实验进行了设计，并采用三维激光散斑仪和无人机进行了实验测量，得到了不同风速下的颗粒浓度分布及尘源位置信息。接着，基于颗粒动力学理论，建立了包括颗粒运动、气流运动和尘源运动三个子模型的耦合模型，并通过数学计算来模拟模型的复杂物理过程，得出了工作面内颗粒浓度和尘源位置随时间的变化规律。最后，通过Fluent软件对所建模型进行了仿真模拟，并与实验结果进行了对比与分析，验证了模型的可靠性和准确性。

关键词：双尘源；多场耦合模型；颗粒动力学；综采工作面；仿真模拟

Abstract:Inviewofthedoubledustsourceproblemonthecomprehensiveexcavationworkingface,thispaperproposesadoubledustsourcemulti-fieldcouplingmodel,aimingtoaccuratelydescribethecomplexphysicalprocessanditsinteractionofthedoubledustsourceonthecomprehensiveexcavationworkingface.Firstly,thispaperdesignsthedoubledustsourceexperimentonthecomprehensiveexcavationworkingface,andusesathree-dimensionallaserspeckleinstrumentanddronestomeasuretheparticleconcentrationdistributionanddustsourcepositioninformationunderdifferentwindspeeds.Then,basedontheparticledynamicstheory,acouplingmodelwiththreesub-models,includingparticlemotion,airflowmotion,anddustsourcemotion,isestablished,andthecomplexphysicalprocessofthemodelissimulatedthroughmathematicalcalculationstoobtainthechangeinparticleconcentrationanddustsourcepositionovertime.Finally,theFluentsoftwareisusedtosimulatetheestablishedmodel,andthesimulationresultsarecomparedandanalyzedwiththeexperimentalresultstoverifythereliabilityandaccuracyofthemodel.

Keywords:doubledustsource;multi-fieldcouplingmodel;particledynamics;comprehensiveexcavationworkingface;simulationThedoubledustsourceonacomprehensiveexcavationworkingfaceposesasignificantchallengeforcontrollingandreducingdustemissions.Tounderstandandmitigatetheseemissions,amulti-fieldcouplingmodelintegratingparticledynamics,fluiddynamics,andthermodynamicsisproposed.

Themodelisbasedonthediscreteelementmethod(DEM),whichdescribesthemotionofindividualparticlesinresponsetoexternalforcessuchasgravity,airflow,andparticle-particleinteractions.TheDEMmodeliscoupledwithcomputationalfluiddynamics(CFD)tocalculatethefluidfieldaroundthedustsource,whichisusedtodeterminethedustdispersionpatternandtrajectory.Thethermodynamicaspectofthemodelisusedtocalculatethetemperatureoftheairandthedustsource,whichaffectsthedustcollectedandthedustsource'sevaporationrate.

Thesimulationprocessiscarriedoutintwosteps.Thefirststepistocalculatethechangeinparticleconcentrationovertime,andthesecondstepistocalculatethedustsource'spositionconcerningtime.Finally,theFluentsoftwareisusedtosimulatetheestablishedmodel.Thesimulationresultsarethencomparedandanalyzedwiththeexperimentaldatatoverifythemodel'sreliabilityandprecision.

Theproposedmulti-fieldcouplingmodelcansignificantlyimprovethedustreductionefficiencyonacomprehensiveexcavationworkingface.Itprovidesadetailedunderstandingofthedustsource'scharacteristics,dustdispersionpattern,andtrajectory,whichhelpstooptimizedustmitigationstrategies.Themodelcanbeappliedtootherdustemissioncontrolapplicationsandcancontributetothedevelopmentofefficientandcost-effectivedustcontrolstrategiesInadditiontoimprovingdustreductionefficiency,theproposedmulti-fieldcouplingmodelhasotherpotentialapplications.Itcanbeusedtostudythedispersionofothertypesofpollutants,suchassmoke,fumes,andgases.Themodelcanalsobeadaptedtosimulatethedispersionofairborneviruses,whichisimportantforpublichealthincrowdedindoorspaces.

Themodel'sabilitytopredictthedustdispersiontrajectoryandconcentrationcanbeutilizedforairqualitymonitoringandriskassessment.Theinformationprovidedbythemodelcanhelptodeterminetheareaaffectedbythedustemissionandtoidentifythepeopleandtheassetsatrisk.Thisinformationcanbeusedtodesignemergencyresponseplans,tolocateairqualitymonitoringstations,andtosetupeffectivedustcontrolmeasures.

Themulti-fieldcouplingmodel'sflexibilitycanalsobeusedtostudytheeffectofdifferentdustcontrolmeasures.Forexample,bycomparingthemodel'spredictionsofthedustconcentrationanddispersiontrajectorybeforeandaftertheimplementationofaparticulardustcontroltechnology,theeffectivenessofthetechniquecanbeevaluated.Thiscanbeusedtooptimizedustcontrolstrategiesandtoidentifythemosteffectiveandcost-efficienttechnologiesfordustemissionmitigation.

Overall,theproposedmulti-fieldcouplingmodelisausefultoolforstudyingthedispersionofdustandotherairbornecontaminants.Itsabilitytosimulatetheinteractionofdifferentphysicalfields,suchasfluidmechanics,thermodynamics,andparticledynamics,providesadetailedunderstandingofdustemissionsourcesanddispersionpatterns.Thisinformationcanbeusedtooptimizedustcontrolstrategies,toimproveairqualitymonitoring,andidentifythemosteffectiveandcost-efficientdustemissionmitigationtechnologies.ThemodelisavaluablecontributiontothefieldofenvironmentalengineeringandhasthepotentialtomakeasignificantimpactonpublichealthandtheenvironmentOneofthekeyapplicationsofthedustemissionmodelisintheminingindustry.Miningoperationshavebeenshowntobeamajorsourceofparticulatematteremissions,whichcanhaveserioushealthimpactsonworkersandnearbycommunities.Themodelcanbeusedtoidentifythespecificsourcesofemissionswithinaminingoperation,suchasblasting,drilling,andmaterialhandling,andtopredictthedispersionpatternsoftheseemissions.Thisinformationcanthenbeusedtodesignandimplementeffectivedustcontrolmeasures,suchaswatersuppression,windbarriers,andventilationsystems.

Inadditiontotheminingindustry,thedustemissionmodelhasapplicationsinarangeofotherindustries,includingconstruction,transportation,andagriculture.Forexample,inconstructionsites,themodelcanbeusedtooptimizetheuseofdustcontroltechnologies,suchaswettingagentsanddustsuppressionsprays,tominimizedustemissionsandworkerexposure.Intransportation,themodelcanbeusedtostudythedispersionofdustparticlesfromroadsandrailroads,andtodesigneffectivemitigationmeasures,suchasimprovedroadsurfacesandvegetationbarriers.Inagriculture,themodelcanbeusedtostudythesourcesanddispersionofdustfromplowing,harvesting,andanimalhusbandry,andtodesignmeasurestoreducethehealthimpactsonworkersandnearbycommunities.

Thedustemissionmodelalsohasimportantapplicationsinairqualitymonitoringandmanagement.Dustparticlesareamajorcontributortoairpollution,andthemodelcanbeusedtopredicttheconcentrationsofdustparticlesintheair,bothindoorsa