Qiuqi Chen
School of Civil Engineering, Chongqing Three Gorges University, Chongqing 404199, P. R. China
China

Xin Tang
School of Civil Engineering, Chongqing Three Gorges University, Chongqing 404199, P. R. China
China

Ying Shi
Department of Earth Resources Engineering, Faculty of Engineering, Kyushu University, Fukuoka 819-0395, Japan
Japan

Ruigang Zhang
Chongqing Key Laboratory of Resource and Environmental Effects of Major Geological Events (Chongqing Institute of Geology and Mineral Resources), Chongqing 401120, P. R. China
China

Fuhua Shang
School of Resource and Environmental Engineering, Inner Mongolia University of Technology, Neimenggu 010051, P. R. China
China