The stability of branched airflow of ventilation network is guarantee of safety in production of coal mine. Two indexes ......

Restricted to size of access tunnel,ducts and power of ventilation equipment,dust,carbon oxides and nitrogen oxides heap......

本文以热力学第一定律为依据对矿井自然风压进行了分析，并提供了稳态、稳流条件下自然风压的计算方法。......