COMSOL-based study on flow field characteristics and gas concentration distribution laws on the coal face under Y-Shape ventilation conditions

摘要

Under the condition of Y-Shape ventilation, it can solve the problem that the gas concentration in the upper corner and the return laneway is beyond the limit of the traditional U-Shape ventilation. The physical model of gas flow in the working face and the mined-out area is established by using the COMSOL Multiphysics. In addition, the distribution of flow field and gas concentration distribution in the working face and mined-out area under the condition of Y-Shape ventilation are studied in accordance with the data obtained from the field; The flow of wind in the mined-out area shows an anti-"L" type distribution, and the concentration of gas in the mined-out area decreases rapidly.