1. Associate Professor, School of Mechanics and Civil Engineering, China Univ. of Mining and Technology (Beijing), Beijing 100083, China (corresponding author).
2. Postgraduate Fellow, School of Mechanics and Civil Engineering, China Univ. of Mining and Technology (Beijing), Beijing 100083, China.
3. Professor, School of Mechanics and Civil Engineering, Stage Key Laboratory for Geomechanics and Deep Underground Engineering, China Univ. of Mining and Technology (Beijing), Beijing 100083, China..