Preface: Development and utilization of pumped storage in closed/abandoned mines
1Mining College, Guizhou University, 550025, Guiyang, China
2Graduate School of Engineering, Nagasaki University, 852-8521, Nagasaki, Japan
3School of Safety Science and Engineering, Anhui University of Science and Technology, 232001, Huainan, China
4School of Qilu Transportation, Shandong University, 250002, Ji’nan, China
5State Key Laboratory of Intelligent Construction and Healthy Operation and Maintenance of Deep Underground Engineering, China University of Mining and Technology, 221116, Xuzhou, China
6School of Energy and Mining, China University of Mining and Technology-Beijing, 100083, Beijing, China
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