1. College of Geosciences and Surveying Engineering China University of Mining and Technology Beijing China
2. School of Coal Engineering Datong University Datong China
3. State Key Laboratory of Coal Resources and Safe Mining China University of Mining and Technology Beijing China
4. School of Energy and Mining China University of Mining and Technology (Beijing) Beijing China
5. School of Mines Key Laboratory of Deep Coal Resource Ministry of Education of China China University of Mining & Technology Xuzhou China