Characteristics of Airflow Reversal of Excavation Roadway after a Coal and Gas Outburst Accident

Determining the influence scope of airflow disorder is an important problem after coal and gas outburst accidents in ventilation systems. This paper puts forward indexes disorder, including length excavation roadway, pressure, pressure difference air door, quantity auxiliary fan. Using orthogonal table L9 (34) numerical simulation method, characteristics reversal are studied, degree calculated should facility fail. Furthermore, on basis fuzzy comprehensive optimization theory, evaluation model established. The results show that roadway most factor affecting stability system, followed by a accident return system greater than inlet larger velocity has impact especially part. Moreover, increases with increase or decreases roadway. provides for prevention accidents.