Underground mine cars are common transportation tools in mines and are widely used in coal mines, metal mines and other fields. In coal mines, underground mine cars are used for coal mining and transportation. The basic functions of mine carts include loading, transportation, unloading, etc., and with the continuous advancement of technology, the application of underground mine carts is also constantly developing. According to different use environments and transportation needs, underground mine carts can be divided into various types, including electric mine carts, battery mine carts, traction mine carts, etc. Different types of mine carts have different characteristics and scope of application. With the development of automation technology, the degree of automation of underground mine cars has also been continuously improved. More and more underground mine cars have realized autonomous navigation, intelligent control and other functions, which greatly improves the efficiency and safety of transportation. However, the operating environment of underground mine cars is still complex. The application of valuable unmanned technology makes operating mine cars without operator supervision, which also brings more safety hazards to underground mine cars, such as spontaneous combustion risks.
Spontaneous vehicle combustion is a relatively common vehicle safety accident. The spontaneous combustion of a vehicle not only causes property losses to the owner, but may also cause casualties. Because the environment of underground mine cars has the characteristics of high temperature, high corrosion, widespread coal dust, and narrow mine tunnels with poor ventilation, deflagration, flashover or even explosion may occur after spontaneous combustion. Poisonous gases may also be produced, which greatly increases the number of fire rescue operations. Therefore, the economic losses and social impact caused by the spontaneous combustion of underground mine cars are greater than those caused by the spontaneous combustion of ordinary vehicles. Generally, spontaneous combustion of underground mine cars is often caused by factors such as fuel, circuits, wear, and high temperatures caused by continuous and uninterrupted operations.
The underground mine car is a heavy mobile equipment. Its spontaneous combustion process is a transition from spontaneous combustion to open flame, and the local fire spreads to the entire body. Its propagation mechanism is relatively complex. Therefore, the underground mine car fire defense equipment should choose an automatic fire extinguishing system that is more independent and better. Take measures before spontaneous combustion and at the early stage of the fire to avoid expanding the burning area. The existing vehicle-mounted fire extinguishing systems currently on the market usually install temperature sensors, flame sensors, etc. in the vehicle body to determine whether the vehicle is burning, and then provide power through the power supply. When a fire is detected, the system is manually activated to extinguish the fire. The disadvantage of this type of automatic fire extinguishing system is that the system is restricted by the power supply, and the performance stability is insufficient; secondly, manual activation cannot solve the safety protection problem of unattended mine cars, and is very likely to cause a delay in rescue. Fire extinguishing facilities may not be activated until the fire spreads. If the fire is not extinguished in time, mass deaths and injuries may easily occur.
Spontaneous combustion of mine cars underground is a serious problem, but by taking preventive measures we can reduce the risk. Therefore, it is recommended that major mining companies regularly inspect and maintain their vehicles to avoid overloading and long-term high-speed driving. At the same time, they also install more reliable and effective automatic fire extinguishing systems for mine cars to improve vehicle fire defense capabilities, so as to reduce spontaneous combustion accidents of mine cars. occurrence to ensure the safety of people's lives and property.
