[Liu, Jianjun;He, Xiang] Wuhan Polytech Univ, Inst Poromech, Wuhan 430023, Peoples R China.^[Liu, Jianjun] Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomech & Engn, Wuhan 430071, Peoples R China.^[Liu, Jianjun;Sun, Yue;Ji, Youjun] Southwest Petr Univ, Sch Geosci & Technol, Chengdu 610500, Peoples R China.