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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