School of Mechanics and Civil Engineering China University of Mining and Technology(Beijing) Beijing 100083 China;
State Key Laboratory of Coal Resources and Safe Mining China University of Mining and Technology(Beijing) Beijing 100083 China;
Henan Key Laboratory for Green and Efficient Mining&Comprehensive Utilization of Mineral Resources Henan Polytechnic University Jiaozuo 454003 China;
State Key Laboratory of Hydroscience and Hydraulic Engineering Tsinghua University Beijing 100084 China;