1. Beijing Key Laboratory for Precise Mining of Intergrown Energy and ResourcesChina University of Mining and Technology Beijing China
2. State Key Laboratory of Coal Resources and Safe MiningChina University of Mining and Technology Beijing China
3. College of Resources and Safety EngineeringChina University of Mining and Technology Beijing China
4. Energy and Mineral Engineering, G3 Center and EMS Energy InstitutePennsylvania State University University Park PA USA