1. School of Mechanics and Civil Engineering, China University of Mining and Technology, Beijing 100083, China
2. Geotechnical Institute, TU Bergakademie Freiberg, Freiberg 09599, Germany
3. School of Energy and Mining Engineering, China University of Mining and Technology, Beijing 100083, China
4. State Key Laboratory of Coal Resources and Safe Mining, China University of Mining and Technology, Beijing 100083, China