沉积岩单轴抗压强度与弹性模量关系研究.docx

JOURNALOFSICHUANUNIVERSITY(ENGINEERINGSCIENCEEDITION)2011年7月July2011文章编号:1009-3087(2011)04-0007-06沉积岩单轴抗压强度与弹性模量关系研究鹏，刘长武，王琛，犹爽，王万千，李何黎(四川大学水利水电工程学院，四川成都610065)摘要:岩石单轴抗压强度和弹性模量之间存在有模糊的正相关性。作者的研究工作力图使两个指标间以往较为模糊的关系变得明确，并以此估算取值较为困难的弹性模量值。在岩石结构、构造特征研究的基础上，统计、整理了不同结构、构造特征的300余个沉积岩岩石试件的测试结果。从统计结果可见，随着结构、构造分类的细化，沉积岩单轴抗压强度与弹性模量之间的相关性也随之提高。表明在对岩石的力学指标间的相关性进行研究时，不应将岩石试件视为均质材料，而应按照其结构、构造的不同分类归纳整理。以分类统计结果为依据，建立了10个针对不同结构构造分类的沉积岩单轴抗压强度与弹性模量间的相关关系。相较以往的类似研究成果，文中所建立的关系式更加合理。而且，在缺乏必要的试验条件，或是初步应用时，所建立的这些关系式还可用于通过抗压强度对弹性模量的估算。关键词:沉积岩;单轴抗压强度;弹性模量;相关关系中图分类号:TU458文献标志码:ACorrelationAnalysisofUniaxialCompressiveStrengthandElasticModulusofSedimentaryRocksHEPeng，LIUChang-wu，WANGChen，YOUShuang，WANGWan-qian，LILi(SchoolofHydraulicandHydroelectricEng．，SichuanUniv．，Chengdu610065，China)Abstract:Anuncertainpositivecorrelationhasbeenfoundbetweenuniaxialcompressivestrengthandelasticmodulusofrocks．Inordertomakethiskindofuncertaintyunambiguousandletrocks’elasticmodulus，whichismoredifficultlyachieved，couldbeestimatedwithnewcorrelations，basedontheresearchofthedifferencesbetweenthetextureandstructureofrocksamples，testingresultsderivedfromover300sedimentaryrocksampleswerestatisticallyanalyzed．Theresultsshowedthatthecorrelativedegreebetweenthesetwomechan-icalparameterswasobservablyincreasedwiththeincreaseoftheparticulardegreeofthestructuralandtexturalclassification．Hence，whilestudyingthecorrelationsbetweenrocks’mechanicalparameters，rockmaterialsshouldn’tbeconsideredashomogeneousmaterialsanymore．Accordingly，tencorrelationsbetweenthesetwoparametersweresetupfordifferenttexturalandstructuralclassificationsofsedimentaryrocksamples．Comparedwithsimilarresearchresultsinthepast，thesetting-upfoundationsofthesecorrelationexpres-sionsweremorerational．Furthermore，theseexpressionsmightbeusedtoestimatetheelasticmodulusofalmostallsedimentaryrockswiththeuniaxialcompressivestrengthwhilelackingtheessentialexperimentalconditionsorduringpreliminaryapplication．Keywords:sedimentary