煤矿用无机盐改性聚氨酯注浆材料的研究冯志强

TU443A10004548(2013)08155906(1975)E-mail:[e-mail]aterialsmodifiedbyinorganicsaltsincoalminesFENGZhi-qiang1,2,KANGHong-pu1,2,HANGuo-qiang1,21.CoalMining&DesignDepartment,TianDiScience&TechnologyCo.,Ltd.,Beijing100013,China;2.BeijingMiningBranch,ChinaCoalResearchInstitute,Beijing100013,ChinaAbstract:Thetraditionalpolyurethanegroutingmaterialsmodifiedbysilicatearestudiedandmodified,whichretaintheexcellentmechanicalpropertiesofthepolyurethanematerial.Themodifiedpolyurethanegroutingmaterialscanavoidcombustiblesafetyperformanceshortcomingsandissuitableforundergroundmines.Thematerialsarecuredtoformthree-dimensionalinterpenetratingnetworkoforganicphase(polyurethanenetwork)andinorganicphase(inorganicsilicatenetwork).Theobtainedsolidificationbodyhasexcellentmechanicalproperties.Themodifiednon-toxicgroutingmaterialshavehighstrengthwithnoimpactfromenvironmentalhumidity,highflashpointandnon-combustiblecharacteristics.Toacertainextent,themodifiedgroutingmaterialscanreplacethepurepolyurethanegroutingmaterials,andmayprovidetechnicalsupportforthemodernizationofcoalenterprisestoachievehighyieldefficiently.Keywords:silicatemodification;polyurethane;groutingreinforcement;crushingcoalandrock[1-2]2010DFB730702012121215602013[5]12[4-6]aR-A+H2OR-B+CO2bCO2+M2O+H2OM2CO3nH2OcM2SiO3+H2OH2SiO3+MOHH2SiO3+H2OmSiO2nH2OdR-A+R-B+R-C(R-A)x(R-B)y(R-C)zCO236aH2ONa2O.mSiO2NaOHH2SiO3bH3CCOH2CH2COO2CCH3OCH3COOHOHOH2CH2COOH2cde8.1561fCO2Na2CO3nSi(OH)4H2ONa2O.mSiO2g--h4a250MPa·sb23min5MT225-9050mm24h1WE-300BFig.1SpecimensofcompressivestrengthtestsGB/T71244cm4cm2mm2Fig.2Specimensofbondstrengthtestsa1140MPa0%3%5%1MPa12MPa3.54.0MPab156220131Table1Effectofmechanicalpropertiesoncontentsofcatalyst(concentration)atroomtemperature/%/MPa/MPa0.1039.60.1534.60.2040.44.30.4040.0236a51015202540.54142.542.543MPab5101520252.162.632.673.843.924.31MPa3Fig.3Bondstrength-temperaturecurvesc5101520253'40''3'20''3'01''2'45''2'30''7A/B1/13min20min24h40MPa4min24h42MPa8235510152030s5s35min15min10s23min9510AB30s35min15min2h42hFig.4Bondingpicturesofmaterials105901408.156320Fig.5Heatreleasecurvesofcuringreactionat201ab24h40MPa3MPa4.5MPacdef20%30%22(20.)Table2PerformanceindicesofmaterialsAB/(MPa·s1)250350150250/190()AB=11/min25/9024h40MPa24h7.0MPa24h3.0MPa12141331382mF21413-62010610716830917925102#782F21413621413#1#267214133Fig.6Layoutofgroutingholesof214133workingfacecrossingfault3KDVJ-400815642013214133Fig.7Planeofgroutingholesof21413(3)workingfacecrossingfault214133Fig.8EffectofdrillingslurryfillingNCOCO215%23[1],.[J].,2010,32(3):375380.(FENGZhi-qiang,KANGHong-puDevelopmentandapplicationofnewwaterproofgroutingmaterialsofpolyurethane[J].ChineseJournalofGeotechnicalEngineering,2010,32(3):375380.(inChinese))[2],.[J].,2009(7):6065.(FENGZhi-qiang,KANGHong-pu.Technologyresearchofchemicalgroutingforcrackedcoalorockmassanddemonstrationproject[J].JournalofYangtzeRiverScientificResearchInstitute,2009(7):6065.(inChinese))[3].[C]//.:,2012.(FENGZhi-qiang.ApplicationofpolyurethanegroutingmaterialmodifiedbySilicateinroadwayofcoalmine[C]//Proceedingsofthe14thNationalConferenceonchemicalGroutingforExchange.Beijing:ChinaElectricpowerPress,2012.(inChinese))[4].[J].,2004(1):4851.(DAIZhen-dong.Experimentalstudiesontheadhesivepropertiesofpolyurethane[J].JournalofNanjingUniversityofScienceandTechnology,2004(1):4851.(inChinese))[5],.[J].,2011(9):4851(SHANChang-bing,LIUYuan-xue.Performanceofpolyurethanegroutingmaterialmodifiedbysodiumsilicate[J].BuildingScience,2011(9):4851.(inChinese))[6].[D].:,2008.(CHONGXiao-li.Studyonthewaterbornepolyurethallemodifiedbyorganosilieon[D].Ji'nan:ShandongUniversity,2008.(inChinese))