作　　者： ; ;

机构地区： 华南理工大学自动化科学与工程学院安全科学与工程研究所

出　　处： 《中南大学学报（自然科学版）》 2011年第11期3502-3506,共5页

摘　　要： 通过酸性矿山排泄水(AMD)蚀化砂岩的力学性质研究,利用Weibull函数分析砂岩微元体强度分布特征,导出单轴压缩下砂岩的损伤本构关系;基于AMD蚀化下砂岩主要胶结物含量的变化,引入砂岩化学损伤变量,得到蚀化后砂岩的等效弹性模量;根据推广的Lemaitre应变等效原理,建立AMD蚀化下砂岩的损伤本构模型。利用现场采集的pH为1.07和3.26的AMD溶液蚀化下砂岩单轴抗压试验,以及文献[7]中人工配制pH为3.0和5.0酸液溶蚀砂岩试验结果,分别检验所建本构模型的合理性。结果表明:模型预测曲线与试验结果曲线基本吻合,较客观地反映AMD蚀化下砂岩的损伤演化特性。 Based on the study of mechanical properties of sandstone during corrosion by acid mine drainage（AMD）,Weibull function was used to express the distribution of microelement strength of sandstone and a damage constitutive model under uniaxial compression was obtained.A chemical damage variable was introduced based on the variety of main cement and equivalent elastic modulus of sandstone was obtained under corrosion by AMD.Then,a damage constitutive model of sandstone during corrosion by AMD was established by using generalized Lemaitre＇s strain equivalent principle.Rationality of the proposed constitutive model was verified through uniaxial compressive tests of sandstone corroded by AMD solution from field with pH of 1.07 and 3.26 and artificial solution with pH of 3.0 and 5.0 in literature [7].The results show that the predicted curves of model agree with experimental ones,which verifies that the proposed model can reflect the damage evolution of sandstone during corrosion by AMD reasonably.

关 键 词： 岩石力学 酸性矿山排泄水 化学损伤 本构模型 分布

领　　域： [建筑科学] [建筑科学]