Abstract:Through studying the distribution law of air flow in simulated roadways, it was proposed that the air flow was affected by the stickiness of the roadway wall, and the wind velocity near the roadway side wall was smaller, and the wind speed near the center of the roadway was larger. This trend was basically the same under the conditions of high, medium and low wind speeds. At the same time, wind speed V(x) was considered as objective function value and distance from roadway wall as variable x. The curve fitting analysis of the test data under three kinds of wind speed conditions was carried out, and the corresponding curve regression equation was obtained. Based on this equation, the corresponding integral equation was constructed to calculate the actual air volume of the tunnel accurately. The result indicated that there was about 15% error between the accurate air volume calculation value and the actual measured value. This error should be considered in actual ventilation measurement.