1. School of Energy Engineering, Xi’an University of Science and Technology, Xi’an, China
2. Key Laboratory for Mining and Disaster Prevention in the West of the Ministry of Education, Xi’an, China
3. School of Coal Engineering, Shanxi Datong University, Datong, Shanxi, China
4. Guoneng Shenhua Ningxia Coal Group Co, Ltd. Shuangma Coal Mine, Yinchuan, Ningxia, China