中文摘要：

通过分析矿井火灾时期的风流特点，提出了矿井火灾时期的风路失效模式，指出矿井火灾时期的通风系统可靠度是个动态变化过程，随着时间的推移，整个通风系统的可靠度会逐渐下降。提出了适于计算大型通风系统火灾时期可靠度的“基于截断误差理论和网络简化技术的不交化最小路集算法”。在此基础上，对矿井火灾时期通风系统的动态可靠度进行了数值模拟。

英文摘要：

By analyzing airflow characters during mine fire, the failure mode of air course during mine fire is put forward, and it is pointed out that the reliability of a ventilation system during mine fire is a dynamic process, i.e. , the reliability of a ventilation system will decrease with the lapse of time. A disjoint minimal path set algorithm, based on network simplification technology and truncation error theory., for computing the reliabilities of large scale ventilation networks during mine fire is brought forward. A numerical simulation of the dynamic reliability of a ventilation system during mine fire is done on the above basis.