1. College of Energy and Mining Engineering, Shandong University of Science and Technology, Qingdao 266590, China
2. State Key Laboratory of Strata Intelligent Control and Green Mining Co-founded by Shandong Province and the Ministry of Science and Technology, Qingdao 266590, China
3. College of Civil Engineering and Hydraulic Engineering, Shandong University, Jinan 250100, China
4. Key Laboratory of In-situ Property Improving Mining of Ministry of Education, Taiyuan University of Technology, Taiyuan 030024, China