EXPERIMENTAL STUDY OF FULL PROCESS OF STRAIN OF ROCK SALT AND SALT-MUDSTONE INTERLAYER IN HUAI¢AN SALT MINE
TANG Mingming1，WANG Zhiyin1，DING Guosheng2
(1. Key Laboratory of Urban Oil and Gas Distribution Technology，China University of Petroleum，Beijing 102249，China； 2. Langfang Branch of Research Institute of Petroleum Exploration and Development，Langfang，Hebei 065006，China)
Abstract：For investigation on the mechanical characteristics of layered salt rocks in Huai¢an Salt Mine，Jiangsu Province，and in consideration of the laminative geological structural character of most salt mines in China，experimental studies of uniaxial and triaxial compressions are carried out on three kinds of rock samples which are rock salt，mudstone and salt-mudstone interlayer. The experiment results indicate that：(1) The strain-stress relationship of rock salt and salt-mudstone interlayer under uniaxial compression or triaxial compression performs obviously strain hardening-softening properties. (2) The rock salt and salt-mudstone interlayer have obvious plastic deformation ability. The elastic modulus measured by the cycle loading-unloading curve is better than that measured directly from the primeval loading curve. (3) For the rock salt，the cohesive force is getting smaller and smaller while the internal friction angle first increases and then decreases with the plastic shear deformation increasing. (4) The presence of mudstone interlayer affects the mechanical characteristics of samples remarkably. The primary phenomenon is the strength¢s increasing. The failure modes of the mudstone interlayer rock salt are determined by their states.
唐明明，王芝银，丁国生. 淮安盐岩及含泥质夹层盐岩应变全过程试验研究[J]. 岩石力学与工程学报, 2010, 29(S1): 2712-2719.
TANG Mingming1，WANG Zhiyin1，DING Guosheng2. EXPERIMENTAL STUDY OF FULL PROCESS OF STRAIN OF ROCK SALT AND SALT-MUDSTONE INTERLAYER IN HUAI¢AN SALT MINE. , 2010, 29(S1): 2712-2719.
