[1]Department of Resources and Civil Engineering, Shandong University of Science and Technology, Tai'an 271019, China;
[2]Geotechnical & Structural Engineering Research Center, Shandong University, Ji'nan 250061, China;
[3]State Key Laboratory of Geomechanics and Geotechnical Engineering (Institute of Rock and Soil Mechanics, Chinese Academy of Sciences), Wuhan 430071, China;