1. Key Laboratory of Coal Methane and Fire Control Ministry of Education China University of Mining and Technology Xuzhou China
2. National Engineering Research Center for Coal and Gas Control China University of Mining and Technology Xuzhou China
3. School of Safety Engineering China University of Mining and Technology Xuzhou China
4. CSIRO Energy Business Unit Clayton South Victoria Australia
5. School of Civil, Mining & Environmental Engineering University of Wollongong Wollongong New South Wales Australia