discharge toxic and hazardous gases and dust, regulate the climatic conditions and create a safe and
comfortable working environment for mining production. The ability of a mine ventilation system to
accomplish this task is called reliability. The mining ventilation system is one of the eight traditional
underground mining systems and is closely related to the safety situation. Currently, among mining
evaluation, mining production capacity, or the standardization of construction, the mine ventilation
system is an extremely important index. The common toxic gases, such as CO、NO2、SO2 and H2S, can
cause death in a short time. Almost all processes in mining produce dust. The major hazards of mine dust
are pneumoconiosis and mineral dust explosion. In addition, the mine's high temperature, high humidity,
the exhaust emissions of diesel equipment, radioactive radon and its daughters of mining are serious
threats to the safety of employees and underground mines in normal production. Therefore, it is essential
to set up a mining ventilation system which can meet the requirements of the daily production of air,
guarantee the stability of air-flow direction and air quality, maintain the reliability and stability of the
operation of the ventilation systems during disasters, and achieve rapid decision-making and relief.
With the increasing of mining depth, mining intensity has increased leading to the growth of
ventilation lines, the increase of ventilation resistance and the increase in temperature of the operating
environment. A higher demand for the reliability of mine ventilation systems in metal mining is revealed.
However, with the growth of the service life of the mine ventilation system, ventilation equipment is
aging, and ventilation practices and the structure of mine ventilation networks have changed, leading to
changes in the ventilation system parameters, so that the intended functions of the ventilation system
cannot be fully realized. Whether the mine ventilation is good or not depends on the reliability of the
mine ventilation system. The reliability of a mine ventilation system can indicate the failure and accident
risks of the system that may occur during normal operation, provide a scientific basis to the mine
ventilation system design and management, find more comprehensive and rational indicators for the
evaluation of the ventilation system or unit performance and also provide technical support to future deep
mining ventilation. It is the key to prevent and reduce accidents in the ventilation system and ensure their
rational, economic and efficient operation, it is also an important task in optimizing ventilation design and
promoting safety.