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1、新型锂盐复合早强剂对煤矿封孔注浆材料早强效果的影响4新型硫酸锂复合早强剂对煤矿封孔水泥早强效果的影响研究吴海龙1,2，刘健1,2，吉小利3，郭林杰1,2，娄亚北1,2（1.安徽理工大学，能源与安全学院，安徽淮南232001；2.安徽理工大学煤炭高效开采省部共建教育部重点实验室，安徽淮南232001；3.安徽理工大学，化学工程学院，安徽淮南232001）摘要：为缩短煤矿封孔注浆材料的候凝时间，以煤矿注浆封孔硅酸盐水泥为研究对象，在Li2SO4单掺早强效果研究的基础上，将锂盐与有机物进行复配。通过正交实验考察了高湿环境中不同组成和配比下，L
2、i2SO4复合早强剂对于封孔水泥早强效果的影响。结果表明，Li2SO4与聚羧酸和三乙醇胺复配新拌混凝土后流动性良好，当该复配早强剂的组成为硫酸锂1.0%，聚羧酸0.3%，三乙醇胺0.03%，掺量为胶体总质量的1.49%时，可使注浆封孔水泥早期强度提高最为显著，1d抗压强度提高到556%，3d抗压强度提高到157%。关键字：煤矿封孔水泥；复合早强剂；协同效应；抗压强度Lithiumsulfateandorganicscomposite-agentseffectontheearlystrengthperformanceofholeseali
3、ngcementusedincoalmineWUHai-long1,2,LIUJian1,2,JIXiao-li3,GUOLin-jie1,2,LOUYa-bei1,2(1.Schoolofenergyandsafety,AnhuiUniversityofScienceandTechnology,HuainanAnhui232001China;2.KeyLaboratoryofMineSafetyandHighEfficientMiningJointlybuiltbyProvinceandEducationMinistry,AnhuiU
4、niversityofScienceandTechnology,HuainanAnhui232001,China;3.SchoolofChemicalEngineering,Anhuiuniversityofscienceandtechnology,HuainanAnhui232001China)Abstract:Inordertoshortenthesettingtimeofholesealingcementusedincoalmine,thepreliminarystudyshowedthattheearlystrengthofho
5、lesealingcementwasincreasedwhenlithiumsulfatewassolelyaddedtoit.Onbasesofthis,lithiumsulfateandorganicswerecompositedtoplaythesynergisticeffectandaddedtoholesealingcementinhighhumiditysurroundings.Theeffectofdifferentcomponentsandadditiveamountsofcomposite-agentsontheear
6、lystrengthperformanceofholesealingcementwasstudiedthroughorthogonalexperiments.Theresultsshowedthatthefreshconcretehavegoodliquidityinthepresenceofcomposite-agents.Whentheadditiveamountofcomposite-agentswas1.49%ofthetotalmassofholesealingmaterials,anditscomponentswas1.0%
7、lithiumsulfate,0.03%polycarboxylateand0.3%triethanolamine(withcementasthedenominator),theearlystrengthperformanceofholesealingcementwasimprovedthemostsignificant,the1dcompressivestrengthwasincreasedto556%and3dcompressivestrengthwasincreasedto157%.Keywords:Coalmineholesea
8、lingcement;Compoundearlystrengthagent;Synergisticeffect;Compressivestrength1引言为提高瓦斯抽采效率，科技人员运用了多种封孔材料：黄
