Numerical Investigating Of Methane Gas Concentration In Mine Face Case study: Mike Mine

In general، mine faces are separated from the mine ventilation network. In mine face workers are exposed to contaminants such as dust and gas. Mine faces are ventilated by auxiliary ventilation optimal design of this system is very complicated. Accumulation of methane gas in mine faces have high potential of disaster. In order to solve this problem، we must have Comprehensive view of methane behavior and distribution in mine faces. In this paper، in order to reach this goal، three-dimensional model of auxiliary ventilation system of Mike mine ​​ was constructed by CFD code fluent. model geometry was meshed by hybrid cell: Quadrilateral cell with 5 cm in model face، fan and out let and Hexagonal cell with 20 cm in model ceiling، floor. Fluid turbulence flow and methane concentration are modeled with and methane air mixture. According to simulation result there is direct relation between high concentration of methane and return flow so high concentration of gases occurs under ventilation ducts and face corners. Finally، there is a good agreement between numerical result and mike mine Measurements.