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对取自潜江白垩系地层2000 m的盐岩试样,进行了一系列的力学特性试验。包括单三轴压缩试验,巴西劈裂试验,直接剪切试验。研究了盐岩的单轴抗压强度,弹性模量等,并与国内外其他地区盐岩相比较,得出潜江盐岩单轴抗压强度,弹性模量都偏小;研究了三轴压缩强度特性,着重研究了模拟地层温度和高围压条件下,温度和高围压对盐岩力学特性的影响机理,研究表明:温度对盐岩的力学特性影响明显,盐岩塑性变形能力非常强,围压对弹性模量的影响非常小,高围压下盐岩没有明显的破坏面,不再是单纯的剪切破坏;同时对盐岩的抗拉强度,抗剪强度参数进行了研究,得到潜江盐岩的抗拉强度为1.041 MPa,抗剪强度参数c,φ值分别为2.46 MPa和41.36°
A series of mechanical tests were carried out on the salt rock samples taken from the 2000m Cretaceous strata in Qianjiang. Including single triaxial compression test, Brazilian splitting test, direct shear test. The uniaxial compressive strength and elastic modulus of salt rock are studied. Comparing with the salt rock in other areas at home and abroad, the uniaxial compressive strength and elastic modulus of Qianjiang salt rock are too small. Compressive strength characteristics, the mechanism of temperature and confining pressure on mechanical properties of salt rock under simulated formation temperature and high confining pressure is studied emphatically. The results show that temperature has a significant effect on the mechanical properties of salt rock, and the plastic deformation capacity of salt rock is very high The effect of confining pressure on elastic modulus is very small. There is no obvious failure surface of salt rock under high confining pressure and no longer pure shear failure. At the same time, the parameters of tensile strength and shear strength of salt rock are studied , The tensile strength of Qianjiang salt rock is 1.041 MPa and the shear strength parameters c and φ are 2.46 MPa and 41.36 °, respectively