School of Civil Engineering Polytechnic University 454003;
School of Civil and Resource Engineering of Science and Technology Beijing 100083;
School of Surveying and Land Information Engineering Polytechnic University 454000;
China Geological Environmental Monitoring Institute 100081;
State Collaborative Innovation Center of Coal Work Safety and Clean-efficiency Utilization 454150;
Mining Engineering Faculty of Kentucky 40506;
unclassified tailings; flocculation settling rate; thickener feedwell; turbulence intensity; flocs micro-structure;