Prediction and optimization of air velocity and gas concentration under control of air flow at outlet of fully mechanized heading

Abstract

Aiming at the problem that the traditional ventilation method can not control the wind speed and reduce the gas concentration, and cause the wind speed and gas concentration to exceed the limit, the new method of dynamic regulation of wind turbine outlet air flow to optimize the wind speed and gas concentration is studied. According to the actual problems, the influences of the air outlet parameters on wind speed and gas are simulated. The correlation mechanism between the air outlet and the wind speed and gas concentration and the regression prediction model are established. In the NingTiao Mine of Shaanxi Coal Group, the underground installation test and verification were carried out by using the self-developed control device, and the optimal wind field control plan for the Ningtiao Mine was determined. The results showed that the wind speed was too large or too small, and the parameters such as the diameter of the air outlet were adopted. The adjustment can control the wind speed to reach the 0.25m/s to 4m/s range required by the regulations, and the gas concentration is significantly reduced.