文档介绍：该【不同掘进工艺煤与瓦斯流固耦合数值模拟研究 】是由【小屁孩】上传分享，文档一共【6】页，该文档可以免费在线阅读，需要了解更多关于【不同掘进工艺煤与瓦斯流固耦合数值模拟研究 】的内容，可以使用淘豆网的站内搜索功能，选择自己适合的文档，以下文字是截取该文章内的部分文字，如需要获得完整电子版，请下载此文档到您的设备，方便您编辑和打印。:..?31??2?????????4?????????????????????梁冰,李野(?????,??????????????123000)??:井下***事故严重威胁着煤矿的安全,研究煤与***耦合作用规律并采取相应措施可以有效地防止事故发生。考虑***气体的可压缩性和吸附、解吸特性,假设***气体在煤体孔隙中的流动遵循Darcy定律,建立了考虑爆破因素的煤与***流固耦合数学模型,sol对其求解。结果表明:炮掘对煤体的破坏能力大于机掘;炮掘工艺下,爆破应力对煤体应力、位移的作用大于应力耦合的作用,机掘工艺应该考虑应力耦合的作用;煤层***压力随着煤壁暴露时间的增加而发生改变,整个巷道附近的***压力有降低的趋势,呈现漏斗状分布;煤层上表面煤体竖向位移边界呈以巷道顶端为中心的“O”型分布,且以“O”型中心处的位移值最大。???:???;??;????;????;???????щ??``A:?????``712DT:???:1672-2132(2011)02-0180-05???э???????a???????????`????;?????????????????;????ο???????;????ο?????????????????????aЕ?,?????b?????????????,????????`??э???????????b???????С????,???????????????????С??????????,???????????????????[1]b????,?????????э?,???????????????????????????????????????эb???????э??,??????????????a??????????????????????????b[4-6]????????,?????????????????????????????:????[2,3]bЧ???????????2???￡ij=ij-pij(1)???,??????????????????,??`p?????,MPa;sol????????????????`????;????????,?????????????`ij???????????,MPa;?????????,????????????`ij????????b???bЧ???:2Gij=2Gij+kkij-apij(2)1-2v1`?????????????????`G?????,Pa;????Ч??????????,????`???б;`a?biot????b??????,???????:?????э?;1???????;?????????????,?``????:```ij=(i,j+j,i)(3)2????????????``??,???????????:```ij,j+Fi=0(4)???????,)4(???)3(?j)1(???????????;?????????????????:2010-03-09;????:2010-11-02????:??973????(2005CB221503-05)??????:?`?(1962-),?,??,??b?????????????????????bEmail:lbwqx@:..`?2??`??:????????????????????181`????:????????:Gui,jj+Guj,ij-ap,i+Fi=0(5)m+(gqg)=0(10)1-2vt??`???????(/3);``????????????????????mkgm`g?????(/3);??????????????????????kgm?,????`qg?Darcy??(m/s);Gvi`t???(s)bGui,jj+uj,ij-ap,i+Fi=(6)1-2vt?????a????????a????????`vi???????(m/s);??????????:`?????(kg/m3)b2VLPLPasp2+2+2p-(1+PLp)t`???????????kg2p=0(11)????????????э,??????,g????????????????????bk￡v1-p??`=1-s+btktkst????????????????,???????????????:?????????????,????????v2(1-)2VLPLPasp?????????????????,????2p+2+p+2-tks(1+PLp)t???????????????b????kg2p=0(12)Langmuir????:gVLPLPm=Cf+Ca=g+gas(7)`????1+PLP??`m????????(kg/m3);(1)??????:`???????????;3?????pt=0=p0,??p0?????`g????????(kg/m);`ga?????????????????????(Pa);(kg/m3),ga=Pa,??Pa??????;???ш????pш?=pi,??pi??s3ш?????(Pa)b`??????(kg/m);`P?????(Pa);(2)???????:`VL?Langmuir????(m3/kg);?????=0;t=0`PL?Langmuir????(1/Pa)b?????????ш????Wш?=????????????Darcy??:1kgWi?j=Ti,??Wi?ш?????qg=-p(8)ш?g(m),Ti???ш?????(Pa)b??`qg?Darcy???(m/s);`kg?????(m2);?????????ш????Wш?=`g??????шaiWb)Pacs(??????n=2Cpvnaш?????s=????????????????ш?s,n??,Csvs2???????????????3???:(m/s),?????(kg/m),C???(m/s)bg=P(9)3??`g?????(kg/m);2`????`P?????(Pa);`????????(kgcm3cP-a-a1),=????????????????,???Mg/RT,??Mg???????(kg/kmol),R?????????????????????????????(Jckmol-1cK-1),T?????????,????,????PDEGeneralform(K)b??,??????????????,???????????,???????????????????a?????????a??????:..`182???????Б?31?`????????a??????????????????????????????????????b???????PDE???Darcy?????b2????????????????????????????,??????,?Comsol?,???????a?????????????MultiphysicsPDE??э???????????????b?u??????????p,???subdomainsetting????????????????????????,?ь???????????`????????????????(??)?????????11-2???????????????????????????????????sol????????€?€?(x€y€z)=15m€15m€5m,???€?€????????????????????`2?2€m2€m10=)z€y€x(??m,????????????????`Distributionofgaspressurealongtunnellingdi-????1m?2m????1??2????brectionunderdesorptionandnon-desorptionЧ??????????????,???????????,????????b????????`炮采掘进工艺耦合效应研究?1??1b?3a?4???????????,??????1a2????a??????э??????б??b??Е????????,????????1`???????`Geometricmodelofexcavatedsection?1`????Table1`Parametersofcoalpetrography?????????????????3`???????????????э?????????€10--`Changeoftotaldisplacementatmonitoringpoints??????????????????%30???-1???-3??????????€10-3m2cd-1????????-3??????`???????????????`***吸附解析影响因素对比分析?2??????????????????????????????b????,?????????????,??????????????4`?????????????????э??????????,????????????`Changeoffirstprincipalstressatmonitoring?????????????????????pointsunderstresswaveactionfromblastexca-????,???m5?????;??????vation:..`?2??`??:????????????????????183`???????,??????,??a?????`不同掘进工艺下***耦合效应对比???,????????????;????,??7?б?????????????????????????????????,???1a2????э???b???????????Е??????????a???э?,???????????????,?????????????????????a??э?,???????????????????????????,?????,Е?????э??????????????????э?????;??????,????b?????????,?????????э?,?`机采掘进工艺耦合效应研究??????????????э?b?5a?6???????????,??????1a2????a??????э??????б??b?????????,???????????????????b??????????????????????????,???????,???????????????????????b?????????у??,???????????????????,?????????????????????b??????,???7`????????????????????????????????????,.7`FigTotaldisplacementatmonitoringpointsinpro-??????????????????????cessofblastingandmechanicalexcavations??????????,????????????????????????b?8?б???????????????1a2??????э???b?????????????????????,???????????????????????????????????,???????????????;??????,??????????,????????????э?,???????????????э?b?5`????????????э?`Changeoftotaldisplacementatmonitoringpointsunderactionofmechanicalexcavation?8`?????????????????`Firstprincipalstressatmonitoringpointsinpro-`炮掘开采方式煤岩***流固耦合分析?6`??????????????э??9j?11??????????????`Changeoffirstprincipalstressatmonitoring?????э???b????,????????pointsunderactionofmechanicalexcavation???уВ??????????э,?????:..`184???????Б?31?`???pOo???????,??oOp??????????,??14mmb3`?`???????a??????????????????????11-2??????,?????М?,???????????????????9`?1???????????????,????????????????,`Nephogramofgaspressuredistributiononfirstday??????:(1)??Е??????,???????????a??????????,????????????a???????;????a??????????a?????,??????????????bЕ???????????????,?Е???,Е????????????,???????,?????????????????????10`?15??????????Е,?????b???????э???????`Nephogramofgaspressuredistributionon15thday??a????????????????,??????,????????????b(2)?????????уВ??????????э,?????????????????,???????b(3)???????????ш???????????oOp???,??oOp?????????,??14mmb?11`?360??????????????:`Nephogramofgaspressuredistributionon360thday[1]`???,???.?????????[J].??ν???????????,??????????????Б,2004,14(7):101-104.??????bLiXL,?12??30?????z??????b?technology[J].ChinaSafetyScienceJournal,2004,14(7):101-104.??????,???????????????[2]`???,???.???????????[M].К?:???????,,[M].Beijing:ChinaCoalIndustryPub-lishingHouse,1999.[3]`???,?`?.??????????????[J].????????Б,2005,24(10):1674-,-sorbedmethane-coalsystem[J].ChineseJournalofRockMechanicsandEngineering,2005,24(10):1674-?12`?30??z????????`Nephogramofdisplacementdistribationinz-di-(???195?):..`?2??`??:?ν????????????????????195`averageofthelargevalues,whilethethree-,thepreventionmeasuresofcuttingslopeandpressingfootarepresentedonthebasisofthree-:landslide;limitequilibriummethod;finiteelementmethod;choiceofparameters(???184?)[4]`???,???,???.????????????XuXZ,LiPC,?????[J].?????????,2003,18(4):basedonporousmedium[J].MechanicsandPractice,420-,23(4):42-,KongXY,[6]`???,???,???,?.???????????ountoffluid-[J].????,1999,21(5):288-[J].JournalofHydrodyna-LiCL,KongXY,XuXZ,,2003,18(4):420-[J].ZiranZazhi,1999,21[5]`???,???,???.????????????(5):288-291.[J].?????,2001,23(4):42--solidCouplingofGasinCoalFaceunderDifferentTunnelingTechnicsLIANGBing,LIYe(DepartmentofMechanicsandEngineeringSciences,LiaoningTechnicalUniversity,Fuxin123000,China)Abstract:.-pressibility,adsorptionanddesorptionofgas,andsupposingthatthegasflowinporeofcoalfollowsDar-cylow,webuiltupagas-;con-trastingtostresscouplingblastingloadaction,coalstressesanddisplacementsislargeandcouplingeffectsshouldnotbeneglectedinmechancalmining;gaspressurechangeswithtimeincreaseofcoalrakeexpo-sureandhasadecreasetrendneartunnel,itlookslikeafunneldistribution;:excavatedsection;coalrake;gas;fluid-solidcoupling;numericalsimulation