煤层瓦斯抽采流固耦合数值模拟与应用研究

《煤层瓦斯抽采流固耦合数值模拟与应用研究》由会员上传分享，免费在线阅读，更多相关内容在学术论文-天天文库。

1、relationshipbetweentheoptimumspacingofholesandtheeffectiveradiusofgasextractionisobtainedthroughthesimulationresults,andtheoptimumspacingbetweenholesis3.2-4.2m;Themathematicalmodelofstressvariationaroundtheroadwaywasestablished,andthenumericalsimulationanal

2、ysisofthestressaroundtheroadwaywascarriedoutonthebasisofthemathematicalmodel.Therationalsealingdepthofthetunnelwasdeterminedtobe12m.Accordingtothemathematicalmodeloffluidsolidcoupling,thereasonableprepumpingperiodofgaswassimulatedtobe180d.Accordingtothesimu

3、lationresultsthatoptimizedandchangedsomeparametersandtestedthegasextractedefficiencyofworkingfaceresultoftestingandoptimizingparametersconformstovariousstandards,anditcanreducethenumberandthetotallengthof25%ofdrillingholes,shortenthegasextractionperiod(i.e.

4、,reducedby30days),thearrangementofboreholesnotonlyensurethecoalminehaveasafetyproductionenvironmentbutalsoreduceddrillingconstructionquantity,meanwhiletheeconomicbenefitenhancedobviously.Keywords:mechanicalproperties;creepdeformation;fluid-structureinteract

5、ion;extractionparameters;numericalsimulationThesis:Applicationresearch目录目录1绪论.........................................................................................................................................11.1研究背景及意义................................

6、..............................................................................11.1.1研究背景................................................................................................................11.1.2研究意义...............................................

7、.....................................................................21.2国内外研究现状..............................................................................................................21.2.1煤体力学性质研究现状...................................................

8、.........................................21.2.2流固耦合研究现状....................................................................................................31.2.3瓦斯抽采技术研究现状..............................