期刊
INTERNATIONAL JOURNAL OF ROCK MECHANICS AND MINING SCIENCES
卷 48, 期 6, 页码 871-877出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.ijrmms.2011.06.012
关键词
Gas and oil storage cavern; Bedded rock salt; Visco-plasticity; Distinct deformation; Dilatancy; Tightness
资金
- National Natural Science Foundation of China [50874034]
- Municipal Science Foundation of Tianjin [07JCYBJC04100]
- Science Foundation of Hebei Province [E2010000081]
This paper discusses the deformation differences that occur due to the presence of thin mudstone layers in underground storage caverns in rock salt. Both plasticity and viscosity are considered in the displacement calculations. The results show that both creep deformation and deformation distinction (i.e. the differences in the creep behavior between the salt rock and the mudstone) are very large under the condition of high effective stresses. When the inner diameters of salt caverns are 40-60m, the maximum radial convergence can reach 24 m and the deformation distinction can reach up to 6 m 30 years after the completion of cavern by solution mining. The affected areas are, however, are restricted to the vicinity of the cavern. The tightness of the cavern may not be violated if the distance between the caverns is greater than this amount. The extension of plastic and dilatancy zones in rock salt is limited to three times the cavern diameter. When elasto-plastic mudstone interbeds are included, tensile failure zones are present in the vicinity of the cavern and the plasticity zone stretches through the entire layer. This could cause a loss of cavern tightness or stability. If the mudstone interbeds creep (although the creep rate is 2 orders lower than that of rock salt) yielding is strongly de-escalated, but the deformation distinction is not affected. (C) 2011 Elsevier Ltd. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据