中文摘要：

地下储气构造物是压气储能（CAES）电站选址的决定因素，其中人工开挖的硬岩洞室因其受地质构造限制小、适应范围广而备受关注。针对压气储能地下洞室方案选型和密闭性要求，选择了典型的洞室埋深（200、300、500 m），考虑不同的洞室形式（隧道式和大罐式）和洞室尺寸，采用Abaqus有限元软件计算出高内气压下压气储能洞室围岩的塑性区和洞周应变。通过分析开挖后和充气后两个工况下围岩的受力和变形特征，获得合适的洞室形式。当围岩级别为Ⅱ级、内压为10 MPa的情况下，埋深为300 m的圆形洞室和大罐式洞室稳定性较好，该埋深下6 m直径圆形洞室最大洞周应变为7.55 ，容积为 大罐式洞室最大洞周应变为5.54 ，以上值都在一般橡胶类高分子密封材料的正常工作范围内，这为密封材料在不同温度下的延伸率和耐久性研究提供了基础数据。

英文摘要：

Compressed air energy storage is a kind of technology to storage energy and generate electricity using compressed air as the medium. Underground structure for compressed air energy storage（CAES） is a decisive factor to choose the location of compressed air energy storage plant, in which artificially-excavated hard rock cavern is more worth researching for little restricted to geology and wide adaptability. To select a scheme of underground cavern for compressed air energy storage, the stability of CAES cavern under high inner pressure is studied by FEM. Plastic zone and tangential strain of CAES cavern with typical buried depth （200, 300, 500 m）, various layouts（tunnels and jars） and dimensions, are calculated by finite element software Abaqus. By analyzing the stress and deformation characteristics of surrounding rock after excavation and inflation, suitable cavern form is achieved. When surrounding rock class is Ⅱ and inner pressure is 10 MPa, caverns buried in depth of 300 m are of good stability. Buried in the depth of 300 m, the maximum tangential strain of 6 m-diameter round cavern and jar cavern are 7.55 and 5.54 respectively, which lays a foundation for research on elongation and durability of sealing material in different temperatures.