1. College of Civil Engineering Sichuan University of Science and Engineering Zigong China
2. State Key Laboratory of Coal Mine Disaster Dynamics and Control Chongqing University Chongqing China
3. National and Local Joint Engineering Research Center of Shale Gas Exploration and Development Chongqing Institute of Geology and Mineral Resources Chongqing China
4. Department of Mechanical Engineering Norwegian University of Science and Technology Trondheim Norway