Stability of wind flow and optimization of ventilation system in inclined shafts-an example of Liouwan coal mine

Wind flow reversal is a serious problem in underground ventilation system, meanwhile the problem of wind speed exceeding the limit in the roadway will seriously affect the stability of wind flow and safe production. For this reason, the ventilation problems in Liouwan coal mine are analyzed and solutions are proposed through theoretical analysis and analytical methods. The test results show that the air resistance in the shaft is high while the air resistance in the maintenance roadway is low, which produces an abnormal airflow direction behavior, and the strategies to solve the ventilation-related problems are proposed and implemented to verify the normal ventilation conditions.