基于含瓦斯煤體滲流特性的研究及固—?dú)怦詈夏Ｐ偷臉?gòu)建.pdf

1、重慶大學(xué)碩士學(xué)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(qǐng)學(xué)位級(jí)別：碩士專業(yè)：安全技術(shù)及工程指導(dǎo)教師：曹樹(shù)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