库车坳陷西部中新生代地层岩石物理和力学性质

Physical and Mechanical Properties of Mesozoic and Cenozoic Rocks in the West of Kuche Depression in Tarim Basin

通过采集库车坳陷西部中、新生代地层岩石样品并测定样品的岩石力学参数 ,表明盐岩、石膏的密度小于砾岩、砂岩和泥岩 ,石盐和石膏的单轴抗压强度远小于砂岩甚至泥岩 ,石盐和石膏的弹性模量明显小于砂岩和泥岩 ,石盐的泊松比远高于砂岩和泥岩 .这些特征表明 ,盐 (膏 )岩的力学行为属于软弱层 ,在应力作用 (压或重力作用 )极易发生塑性变形 .

The physical and mechanical parameters of rock and salt samples in Kuche depression of Tarim Basin have been collected and measured. The experiments shows the density parameters of salt and gypsum are less than that of conglomerate, sandstone and mudstone; the parameters σ c of salt and gypsum are far less than that of sandstone and mudstone; the parameters E of salt and gypsum are far less than that of sandstone and mudstone; however, the parameter μ of salt is greater than that of sandstone and mudstone. These Mechanics properties lead to the result that salt and gypsum are relative weak, and the plastic deformation are easy to take place in these beds which contain salt or gypsum.