Study on Methane Distribution in the Face Zone of the Fully Mechanized Roadway with Overlap Auxiliary Ventilation System

An overlap auxiliary ventilation system is very often used for driving roadways in methane-rich coal seams. zone between the outlets of forcing duct ends with a whirl flow air-duct (WFAD) and exhaust dust scrubber that created by applying system. This study examines distribution methane concentrations at various distances zone. Maintaining long could increase advance face. Therefore, impact length on concentration distribution, beyond zone, investigated. The evaluation performed utilizing well-established computational fluid dynamics (CFD) approach. mathematical model emissions into roadway adopted. Moreover, CFD validated. A vortex return air, caused free airstream flowing out scrubber, found. air responsible higher end conclusion can be drawn maintaining 5 m to 10 should done control permissible concentrations.