^aSchool of Public Administration, Hohai University, Nanjing 211100, China

^bEngineering Research Center of Ministry of Education for Mine Ecological Restoration, China University of Mining and Technology, Xuzhou 221000, China

^cInstitute of Ecological Environment Restoration in Mine Areas of West China, Xi’an University of Science and Technology, Xi’an 710054, China

^dCollege of Geology and Environment, Xi’an University of Science and Technology, Xi’an 710054, China

^eState Key Laboratory of Coal Resources and Safe Mining, China University of Mining Technology, Beijing 100083, China