Abstract Tail gas emitted by underground trackless rubber wheel cars poses a serious threat to the health and safety of underground workers. To effectively reduce the tail gas concentration of a comprehensive excavation face. this study adopted a numerical simulation method to investigate the influence of air suction volume Q and distance L between trackless rubber wheel cars and head... https://www.lightemupsequences.com/limited-save-Custom-Congratulations-Banner-p4839-hot-choice/