Abstract: Compressed air energy storage(CAES) in underground lined rock caverns(LRC), with its advantages of long power generation time, large scale, short construction period, flexible site selection, low project cost, long operation period, and environmental friendliness, has demonstrated strong vitality in the field of new energy storage, and will significantly promote the construction of new power systems and the high-quality development of renewable energy. Unlike the operational characteristics of traditional underground spaces, the underground lined rock caverns storing compressed air not only have to withstand alternating high internal pressure expansion during the inflation and deflation process, but also experience significant temperature changes. This article focuses on underground lined rock caverns, elaborates on its working principle and the design concept of flexible sealing structure; in view of the load characteristics such as high pressure, alternating stress, and temperature changes, it systematically analyzes the research progress in related theories and analysis methods of underground lined rock caverns, mainly including the temperature and pressure response in the cavern and the heat transfer characteristics of the sealing structure, the stress path and mechanical response of surrounding rock, the cracking and control standards of reinforced concrete lining, the stability and safe burial depth of overlying rock mass, the sealing layer and the sealing plug, etc., and provides an outlook on the development trends of the basic principles and analysis methods for underground lined rock caverns.

Key words: compressed air energy storage, lined rock caverns, analytical methods