金坛层状盐岩的基本力学特性  

Mechanical characteristics of the bedded rock salt from Jintan Salt Mine

作　　者：黄孟云 刘伟[2] 

机构地区：[1]中国石油化工股份有限公司天然气川气东送管道分公司金坛储气库项目部,江苏金坛213200 [2]中国科学院武汉岩土力学研究所,武汉430071

出　　处：《土工基础》2014年第4期41-43,47,共4页Soil Engineering and Foundation

基　　金：国家自然科学基金资助项目(51274187)

摘　　要：拟在江苏金坛深部盐岩地层中开展战略能源储备建设工作。地层的力学特性是开展造腔方案设计、稳定性评价等的基础。基于此,针对所取层状盐岩系统开展了单轴、三轴、直剪和劈裂试验。通过试验研究表明:(1)金坛盐岩属于典型软岩,单轴仍以脆性劈裂为主,三轴压缩下强度大大提高,塑性变形能力大大增强,适合储气库的变形要求;(2)夹层的存在提高了盐岩强度,对盐岩具有加紧作用,有利于腔体稳定性;(3)界面的强度与盐岩和夹层相当,不是一个弱面,有利于维持储气库的稳定性和密闭性。研究结果为金坛储气库的建设提供了重要依据。Energy storage caverns in salt formations of a Jintan salt mine are proposed. The mechanical properties are fundamental aspects of cavern design, stability evaluation. The laminar salt rock samples are systematically studied throughout uniaxial, triaxial, direct shear and split tests. The test results indicate： the Jintan salt rock samples are soft rock mass. The split failure is the major failure mode under the uniaxial compression tests. The shear strength as well as the plasticity under triaxial shear tests is increased. The lenses of other rock type in the salt rock increase the strength of the salt rock and therefore improve the stability of the rock cavern. The interface between the salt rock and other rock type is not a weak zone and its strength is similar to that of salt rock. The strong interface strength is beneficial to the gas storage cavern and its air-tight properties.

关 键 词：能源储库 岩盐 力学特性 界面 稳定性 

分 类 号：TU327[建筑科学—结构工程]