作者机构:[1]The State Key Laboratory of Coal Resource & Mining Safety, China University of Mining and Technology, Beijing 100083, China, [2]Department of Resource and Earth Science, China University of Mining and Technology, Beijing 100083, China
相关基金:Acknowledgements This work was financially supported by National Natural Science Fund of China (Grant No. 40972110), the specialized research fund for the doctoral program of Higher Education of China (Grant No. 2006029009) and the program for New Century Excellent Talents in Universities and Colleges (Grant No. NCET-07-0801).