1. Jiangsu Key Laboratory of Coal-Based Greenhouse, Gas Control and Utilization Xuzhou, Jiangsu 221116, P. R. China
2. State Key Laboratory for Geomechanics and Deep Underground, Engineering China University of Mining and Technology, Xuzhou, Jiangsu 221116, P. R. China
3. School of Physics, Huazhong University of Science and Technology, Wuhan 430074, P. R. China
4. Department of Chemical Engineering, School of Engineering, The University of Western Australia, WA 6009, Australia