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1、岩土会议单轴压缩下含杂质盐岩的声发射特征试验研究徐杨梦迪1，刘建锋1*，徐慧宁1，李天一2，向高1，邓朝福1，吴池1（1．四川大学水力学与山区河流开发保护国家重点实验室、水利水电学院，四川成都610065；2.四川省地质工程勘察院，四川成都610000）摘要：针对中国能源地下储库盐岩高杂质的问题，基于水不溶物含量及类型将取自某拟建储库的盐岩试样加工后分为纯盐岩组（纯盐岩）、含泥岩杂质盐岩组（泥质盐岩和盐质泥岩）、含钙芒硝岩杂质盐岩组（钙芒硝质盐岩和钙芒硝岩），然后开展了单轴压缩破坏全过程的声发射测试试验。通过试验研究
2、，得到了以下结果：（1）泥岩杂质和钙芒硝岩杂质均能提高盐岩的抗压强度，减小其变形能力，钙芒硝岩杂质使得盐岩屈服阶段大幅度减小；（2）随着泥岩杂质含量的增加，振铃计数率活跃区会后移，能量率大值集中区向后推移，累计振铃计数曲线和累计能量曲线呈现出由上凸到下凹的变化过程；（3）随着钙芒硝岩杂质的增加，振铃计数率最大值出现时间是向后推移的，整个试验过程中振铃计数率和能量率相对不稳定，累计能量-应变曲线台阶状增长更明显。关键词：含杂质盐岩；泥岩；钙芒硝；声发射；单轴压缩中图分类号：TU45文献标志码：AExperimental
3、StudyonAcousticEmissionCharacteristicsofSaltRockwithImpuritiesunderUniaxialCompressionXUYangmengdi1，LIUJianfeng1*，XUHuining1,LITianyi2，XIANGGao1，DENGChaofu1，WUChi1(1.StateKeyLab.ofHydraulicsandMountainRiverEng.,CollegeofWaterResourceandHydropower,SichuanUniv.,C
4、hengdu,Sichuan610065,China；2.GeologicalEng.SurveyInst.ofSichuanProvince,Chengdu610000,China)Abstract:AccordingtothecharacteristicsofsaltrocksofChineseenergyundergroundstoragewhichishighimpurityuniaxialexperimentswerecarriedoutonthepuresaltrocks,argillaceoussalt
5、rock,halopelite,glauberitesaltrockandglauberiterock.Allofthesespecimensweretakenfromaproposedsaltrocksreservoir,andthenweredividedbytheimpuritycontentandtype.Throughexperimentalstudy,thefollowingresultswereobtained:(1)boththemudstoneimpurityandglauberiterockimp
6、uritycanincreasethecompressivestrengthofpurerocksaltandreduceitsdeformability,glauberiterockimpurityhasmoreinfluenceonrocksaltthanthemudstoneimpurity;(2)withtheincreaseofmudstoneimpurities,theactiveareaofAEcountsispostponed,highenergyrateisoverbackwards,cumulat
7、iveAEcountscurveandtheaccumulativeenergycurvepresentedbythechangingprocessfromconvextoconcave;(3)withtheincreaseofglauberiterockimpurities,thetimewhenthemaximumAEcountappearedwasbackwards,theAEcountsandenergyratewasrelativelystablethroughthewholetest,theaccumul
8、ativeenergy-straincurvestepgrowthmoreobviously.Keywords:rocksaltwithimpurity;mudstone;glauberite;acousticemission;uniaxialcompression0引言盐岩因其极强的致密性、超低的渗透性、溶水性、蠕变损伤恢复等特性以及不溶于油
