1. Shaanxi Provincial Coal Geology Group Co. Ltd., Key Laboratory of Coal Resources Exploration and Comprehensive Utilization, Ministry of Natural and Resources, Xi’an 710026, China
2. School of Electrical Engineering, Xi’an Jiaotong University, Xi’an 710049, China
3. State Key Laboratory of Multiphase Flow in Power Engineering, School of Energy and Power Engineering, Xi’an Jiaotong University, Xi’an 710049, China