1. State Key Laboratory for Geomechanics and Deep Underground Engineering, China University of Mining and Technology, Xuzhou, P. R. China
2. Shandong Provincial Key Laboratory of Marine Environment and Geological Engineering, Ocean University of China, Qingdao, P. R. China
3. Key Laboratory of Coastal Science and Integrated Management, Ministry of Natural Resources, Qingdao, P. R. China
4. Key Laboratory for Submarine Geosciences and Prospecting Techniques (Ministry of Education), College of Marine Geosciences, Ocean University of China, Qingdao, China
5. School of Mathematical Sciences, Queensland University of Technology, Brisbane, Australia