A Study on the Transient Response of Compressed Air Energy Storage in the Interaction between Gas Storage Chambers and Horseshoe-Shaped Tunnels in an Abandoned Coal Mine
Fuqing Li,
Fufeng Li,
Rui Sun,
Jianjie Zheng,
Xiaozhao Li,
Lan Shen,
Qiang Sun,
Ying Liu,
Yukun Ji,
Yinhang Duan
Affiliations
Fuqing Li
State Key Laboratory of Intelligent Construction and Healthy Operation and Maintenance of Deep Underground Engineering, China University of Mining and Technology, Xuzhou 221116, China
Fufeng Li
Shanghai Urban Construction Municipal Engineering (Group) Co., Ltd., Shanghai 200065, China
Rui Sun
School of Mechanics and Civil Engineering, China University of Mining and Technology, Xuzhou 221116, China
Jianjie Zheng
State Key Laboratory of Intelligent Construction and Healthy Operation and Maintenance of Deep Underground Engineering, China University of Mining and Technology, Xuzhou 221116, China
Xiaozhao Li
State Key Laboratory of Intelligent Construction and Healthy Operation and Maintenance of Deep Underground Engineering, China University of Mining and Technology, Xuzhou 221116, China
Lan Shen
Shanghai Tunnel Engineering Co., Ltd., Shanghai 200032, China
Qiang Sun
China Coal (Tianjin) Underground Engineering Intelligence Research Institute Co., Ltd., Tianjin 300121, China
Ying Liu
School of Mechanics and Civil Engineering, China University of Mining and Technology, Xuzhou 221116, China
Yukun Ji
State Key Laboratory of Intelligent Construction and Healthy Operation and Maintenance of Deep Underground Engineering, China University of Mining and Technology, Xuzhou 221116, China
Yinhang Duan
China Coal (Tianjin) Underground Engineering Intelligence Research Institute Co., Ltd., Tianjin 300121, China
This study focuses on the renovation and construction of compressed air energy storage chambers within abandoned coal mine roadways. The transient mechanical responses of underground gas storage chambers under a cycle are analyzed through thermal-solid coupling simulations. These simulations highlight changes in key parameters such as displacement, stress, and temperature within the chamber group during the loading and unloading processes of compressed air energy storage. It is found that within a cycle, the small circular chamber experiences the most significant deformation, with an average peak displacement of 0.24 mm, followed by the large circular chamber and horseshoe-shaped tunnels. The small circular chamber exhibits maximum tensile and compressive stresses. Therefore, special attention in engineering practice should be paid to the long-term safety and stability of small circular tunnels, and the stability of horseshoe-shaped tunnels should be also carefully considered. The findings from this study offer some insights for theoretical support and practical implementation in the planning, design, construction, and operation of high-pressure underground gas storage chambers for compressed air energy storage.
