Abstract: In the analysis of airflow status in network by traditional ventilation network solution method, airflow was always considered as steady flow, dynamic changing process in network could not be simulated. Actually, in the case of ventilation network disaster airflow always was unsteady flow. Through the analysis of air flow law of one-dimensional unsteady compressible flow air in ventilation network during mine disaster period, new mine ventilation network solution method-characteristic method was proposed by using CFD analysis method, to improve the quality of mine ventilation management, enhance the capacity for resisting natural disasters of mine, ensure the safety production of coal mine.

Key words: CFD, Mine ventilation, Network solution, Characteristic method