1. State Key Laboratory for Geomechanics & Deep Underground Engineering, China University of Mining & Technology, Xuzhou, Jiangsu 221116, China
2. Jiangsu Key Laboratory of Environmental Impact and Structural Safety in Engineering, China University of Mining & Technology, Xuzhou, Jiangsu 221116, China
3. School of Mechanics and Civil Engineering, China University of Mining and Technology, Xuzhou 221116, China