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针对压缩空气储能（Compressed Air Energy Storage，CAES）电站地下人工洞室设计时计算洞室埋深未充分考虑围岩承载力的问题，参考国内外相关计算方法，基于极限平衡分析法提出一种CAES电站地下人工洞室埋深的计算方法，在考虑上覆岩体重力作用、破坏面上抗剪力的情况下通过假定极限状态下的岩体破坏面建立极限平衡模型进行力学分析。同时，讨论破裂角、侧压力系数、埋深、洞径等参数对抗抬安全系数的影响。结果显示：破裂角对抗抬安全系数的影响规律与岩层侧压力系数相关，当侧压力系数一定时，抗抬安全系数随着破裂角的增大而增大；当破裂角一定时，抗抬安全系数随着侧压力系数的增大而增大。此外，抗抬安全系数随着洞室直径的增大而减小，随着洞室埋深的增大而增大。
Abstract：In response to the problem that the bearing capacity of surrounding rock is not fully considered when calculating the buried depth in the design of underground artificial caverns for Compressed Air Energy Storage(CAES), with reference to the relevant calculation methods at home and abroad, a calculation method for the burial depth of CAES power station underground artificial caverns is proposed based on the limit equilibrium analysis method, and the limit equilibrium model is established by assuming the failure surface of rock mass under the limit state for mechanical analysis, taking into account the gravity effect of the overlying rock mass and the shearing resistance on the failure surface. On this basis, the effects of rupture angle, lateral pressure coefficient, burial depth, hole diameter and other parameters on the safety factor of anti-lifting are discussed. The results show that the influence of rupture angle on the stability coefficient of anti-lifting is related to the lateral pressure coefficient. When the lateral pressure coefficient is constant, the safety coefficient of anti- lifting increases with the increase of rupture angle. When the rupture angle is constant, the anti-lift safety coefficient increases with the increase of the lateral pressure coefficient. In addition, the anti-lifting safety factor decreases with the increase of the cavity diameter and increases with the increase of the buried depth of the cavity.
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基本信息:
DOI：10.19929/j.cnki.nmgdljs.2024.0074
引用信息:
[1]杨雪雯.压气储能电站地下人工洞室上覆岩体抗抬稳定影响因素分析[J],2024,42(06):8-13.DOI:10.19929/j.cnki.nmgdljs.2024.0074.
基金信息:
中国能源建设集团广东省电力设计研究院有限公司科技项目“高压地下洞室关键技术研究”（EV10321W）