岩土力学2011，Vol.32Issue(9)：2791-2797,2851,8.
井喷失控条件下盐岩储库稳定性分析
Stability analysis of salt rock gas storage cavern under uncontrolled blowout
摘要
Abstract
Uncontrolled blowout is a kind of extreme condition for gas storage cavern operation. Based on one-dimensional insulation flow theory, the analytical solution of pressure drop for salt cavern under blowout is obtained. The stress state, the deformation characteristics and the damage zone evolvement of the gas storage cavern are simulated and studied under three different operating modes, combining with the geological data of Jintan salt deposit. It is shown that the hard interlayers tend to failure before rock salt host; and the three failure regions around the interlayers expand to be sprinkled the whole salt cavern and extend 6-8 m along the radial direction during the unloading phase. The cavem convergence increases with the reduction of the initial internal pressure. There is a large volume loss of 5.02% for initial unloading pressure of 7 MPa. The strain rate of the surrounding salt enlarges to 10-2 s-1, which belongs to quasistatic bound, during unloading phase. The study indicates that the initial internal pressure is the key factor to maintain the storage cavern stability under the runaway blowout. Relatively high operating pressure is suggested to keep in the extreme disaster environment.关键词
盐岩储气库/压力失控/稳定性/数值模拟Key words
salt rock gas storage cavern/ runaway pressure/ stability/ numerical simulation分类
建筑与水利引用本文复制引用
马林建,刘新宇,许宏发,杨石刚,王子甲..井喷失控条件下盐岩储库稳定性分析[J].岩土力学,2011,32(9):2791-2797,2851,8.基金项目
国家973计划资助项目(No.2009CB724608). （No.2009CB724608）
