1. College of Safety and Environmental Engineering, Shandong University of Science and Technology, Qingdao, Shandong 266590, People’s Republic of China
2. Key Laboratory of Safety and High-Efficiency Coal Mining, Ministry of Education (Anhui University of Science and Technology), Huainan, Anhui 232001, People’s Republic of China
3. College of Civil & Structural Engineering, Shandong University of Science and Technology, Qingdao, Shandong 266590, People’s Republic of China
4. State Key Laboratory of Coal Resources and Safe Mining, China University of Mining and Technology, Xuzhou, Jiangsu 221116, People’s Republic of China