1. School of Civil and Resources Engineering, University of Science and Technology Beijing, Xueyuan Road 30, Beijing 100083, China
2. State Key Laboratory of High-Efficient Mining and Safety of Metal Mines of Ministry of Education, University of Science and Technology Beijing, Xueyuan Road 30, Beijing 100083, China
3. School of Energy and Environment, Zhongyuan University of Technology, Zhongyuan Middle Road 41, Zhengzhou 450007, China