长江科学院院报2016，Vol.33Issue(8)：86-90,95,6.DOI:10.11988/ckyyb.20151116
西部弱胶结泥岩的三轴压缩试验分析
Triaxial Compression Test Analysis of Weakly Cemented Mudstone in West China
摘要
Abstract
In order to solve the roadway support problem of weakly cemented soft rock in west China , we collected typical weakly cemented mudstone samples in Luxin coal mine in Inner Mongolia , and conducted indoor triaxial compression test on the soft rock at different states (natural state, saturation state, dry state) under different stress levels.We analyzed the relations of strength characteristics , fundamental mechanical indexes vs .confining pressure . The results are as follows:firstly, the peak strength and residual strength of weakly cemented mudstone are very low under natural condition .With the increasing confining pressure , the peak strength and residual strength of mudstone both have a larger increase , and the relationship between peak strength and confining pressure is logarithmic .Sec-ondly, as mudstone is very sensitive to water , peak strength and residual strength decreases with the increasing moisture content, while peak strength decreases more significantly .Thirdly,softening coefficient decreases with the increasing confining pressure , and the elastic moduli of mudstone under three different states increase linearly with the increasing confining pressure .Lastly, we established the triaxial compression stress-strain relationship by analy-zing the four-stage triaxial compression stress-strain fitting curve of mudstone .关键词
弱胶结泥岩/三轴压缩试验/应力-应变曲线/变形特征/峰值强度/残余强度Key words
weakly cemented mudstone/triaxial compression test/stress-strain curve/deformation characteristic/peak strength/residual strength分类
矿业与冶金引用本文复制引用
王磊,李祖勇..西部弱胶结泥岩的三轴压缩试验分析[J].长江科学院院报,2016,33(8):86-90,95,6.基金项目
国家自然科学基金项目（51404193）；中国博士后基金面上项目（2015M572581）；陕西省自然科学基金青年人才项目 （）
