基于含瓦斯煤體滲流特性的研究及固—氣耦合模型的構(gòu)建.pdf

1、重慶大學碩士學位論文基于含瓦斯煤體滲流特性的研究及固氣耦合模型的構(gòu)建姓名：郭平申請學位級別：碩士專業(yè)：安全技術(shù)及工程指導教師：曹樹剛201005英文摘要IIIABSTRACTDisasterpreventioncontrolofcoalgasoutburstisthemajchallengesofthecoalmineproductionfacedgasseepageinthecoalbodyisanimptantindicationo

2、fjudgetothedegreeofdifficultyofcoalgasoutburst.Theflowofgasinthecoalseamwasaffectedbyanumberoffactswhichisacomplexsolidgascouplingprocess.Inthispaperthegasfilledcoalasresearchobject，coalgascontainingpesfracturestructure，

3、seepageacteristicsarestudiedbyMicromeriticsASAP2020physicaladsptiontypeinstrumentVEGAⅡtypebuiltspectrumscanningelectronmicroscopySelfdevelopedtriaxialpermeametersoon.ThroughIndepthanalysisofthetheyestablishthegassolidcou

4、plingmodel.Someprogresshasbeenmadethroughtheseasfollows:1)Summarizethegenesispescrackscausesclassification，microstructuralacteristicsofoutburstcoalusefractaldimensionofthetheyofthecasetodealwithSEMimagesofcoalbymeansofsc

5、anningelectronmicroscopecomparativeanalysisoftheoutburstcoal’snotoutburstcoal’stheinternalpestructure.2)Analyzeindepththeseepageacteristicsofthesensitivefactstheimpactofthegasfilledcoal.Itisprovedbyexperimentsnumericalsi

6、mulationthat:thegasseepagevelocityofoutburstcoalsamplesincreasewiththeincreaseofgaspressureunderfixedaxialconfiningpressurestherelationshipbetweengasseepagevelocityofoutburstcoalsamplesgaspressurecanbedescribedasquadrati

7、cpolynomialfunctionthephenomenonthattheincreaseofgaspressureresultinthepermeabilityofoutburstcoalshowingafirstdecreasesthenincreasesknownastheKlinkenbergeffectthepermeabilityofoutburstcoalwas“V“shapechangewiththeincrease

8、ofgaspressurewiththeincreaseingaspressureKlinkenbergcoefficientbtheabsolutepermeabilityKgcanbedescribedaspowerfunctionrelationshipthegaspressurepthepermeabilityKcanbedescribedasquadraticpolynomialfunction.3)With3differen