GEOMECHANICAL MODEL TEST OF CHAIN FAILURE AND STABILITY ANALYSIS OF UNDERGROUND GAS STORAGE
CAVERN IN SALT ROCK
LIU Yaoru1，LI Bo1，YANG Qiang1，GUAN Fuhai2
(1. State Key Laboratory of Hydroscience and Hydraulic Engineering，Tsinghua University，Beijing 100084，China；
2. Nanjing Hydraulic Research Institute，Nanjing，Jiangsu 210024，China)
Abstract：It is very important to study whole stability and failure mechanism of gas storage cavern in layered salt rock for safe operation. The geomechanical model has been constructed with small blocks and low strength binder. Small blocks are used to simulate the deformation characteristics of salt rock，and the low-strength adhesive to simulate the strength property of salt rock. Mudstone interlayer is simulated with dewatered gypsum slices. The natural gas injection-production cycles are simulated for 4-cavern group under different internal pressures. The displacement and strain of the surrounding rock and the cavern group are automatically recorded by the displacement meters and the strain gauges buried in the model. Cavern stability under different gas production processes，the failure pressure of the caverns and the impact of mudstone interlayer on stability are analyzed. The result shows that the injection-production of single cavern have large influence and mudstone has little influence on the stability and chain failure of cavern group.
刘耀儒1，李 波1，杨 强1，官福海2. 岩盐地下油气储库群稳定分析及连锁破坏的地质力学模型试验[J]. 岩石力学与工程学报, 2012, 31(s2): 3681-3687.
LIU Yaoru1，LI Bo1，YANG Qiang1，GUAN Fuhai2. GEOMECHANICAL MODEL TEST OF CHAIN FAILURE AND STABILITY ANALYSIS OF UNDERGROUND GAS STORAGE
CAVERN IN SALT ROCK. , 2012, 31(s2): 3681-3687.
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