Mathematical Modeling and Experimentation of Airflow Disturbance in Tramcar-roadway System

Abstract This paper analyzes the variation law of equivalent air resistance in a mine car-roadway system, establishes the index system of influencing factors of airflow disturbance. Using experimental system of mine ventilation simulation, the characteristics of air supply of the roadway, blocking coefficient and disturbance of air resistance in roadway are studied. Furthermore, the mathematical model for calculating the equivalent disturbance air resistance is built in the different tramcar positions. The result shows that the tramcar-roadway system has a positive disturbance effect when the tramcar’s speed is greater than the air velocity of the roadway, and it is equivalent to air regulation by addition of pressure of the mine ventilation system. The negative disturbance effect is equivalent to air regulation by addition of resistance. It has the stronger disturbance effect if the air velocity or the roadway section is small. The maximum disturbance variation of air resistance occurs at the moment while the tramcar mine car enters or leaves the roadway. The error between the mathematical model and the measured data is 8.12 %. The research results can provide theoretical basis for intelligent regulation of mine ventilation system.