Mine fire is a serious hazard, so the prevention and control measures are very important

3. Apply new technology and new equipment to improve fire prevention capability

(1) Application of automatic fire alarm device. The application alarm system can accurately detect the abnormal state, and provide the information to the maintenance personnel through processing, so that the hidden danger of fire can be eliminated in the bud.

(2) Actively carry out research on the occurrence and development mechanism and law of mine fire, and constantly research and develop mine fire alarm equipment, fire extinguishing equipment and escape equipment; So that the mine electric fire in the prevention, monitoring and rescue of three aspects, to achieve three-dimensional prevention and control measures.

3. Fire prevention and control technology in different locations

(1) Wellhead building fire. In case of fire in the wellhead building, measures should be taken to prevent fire gas and flame from invading the well: immediately reverse the air flow or close the wellhead fire door, and stop the main ventilator if necessary; Guide the personnel out of the mine according to the provisions of mine disaster prevention and treatment plan; Extinguish the fire quickly.

(2) Fire in the shaft. In case of fire in the air inlet shaft, in order to prevent the fire gas from invading the underground roadway, it is necessary to take measures to reverse the wind or stop the operation of the main ventilator.

(3) Fire in the car yard at the bottom of the well. When a fire occurs at the bottom of the air inlet shaft and the adjacent chamber, it is necessary to reverse the wind or short-circuit the air flow to ensure that the fire gas does not invade the work area. When a fire occurs at the bottom of the return air well, the normal wind direction should be maintained, and the amount of air entering the fire area can be reduced under the premise that the combustible gas will not gather to the explosion limit. Mine rescue personnel should use the maximum manpower and material resources to directly extinguish the fire and prevent the spread of fire. In order to prevent the burning of the wooden piles above the concrete supports and arch roadways, the arch can be perforated or broken, and the water curtain can be set. If the spread of a fire endangers critical sites (such as Wells, powder depots, power stations, water pump houses, etc.), the main manpower and material resources should be used to protect these sites.

(4) Fire in underground chamber. When a fire occurs in the chamber and there is no fire door in the chamber, the air inlet should be controlled by hanging wind barriers and the fire extinguisher, water, high-expansion foam or sand should be used to extinguish the fire.

(5) Fire in inclined roadway. When a fire occurs in a inclined air inlet tunnel, measures must be taken to prevent the fire gas from intruding into the places where people work, especially the coal face. To this end, measures such as airflow short circuit, local wind back and regional wind back can be taken.

(6) Fire in stone doors and other horizontal passageways. In the event of a fire in the roadway, stone gate and other horizontal roadway located in the mine or a wing general air inlet alley, the most effective ventilation mode (reverse wind, airflow short circuit, multi-air shaft double area reverse wind, normal ventilation, etc.) should be selected in order to save people and put out the fire. When taking short circuit ventilation to prevent fire expansion, it is necessary to ensure that the harmful gases of the fire are not reversed.

(7) Coal face fire. When a fire occurs in the coal mining face, it is generally necessary to extinguish the fire under normal ventilation, and it must be done: extinguish the fire from the incoming air side, and effectively use the fire extinguisher and dustproof water pipe. When the coal face of steep inclined coal seam is on fire, it is not allowed to put out the fire above the fire source to prevent water vapor injury; It is also not allowed to extinguish the fire under the fire source to prevent the collapse of the fire area from hurting people. And from the side (that is, the direction of the working face or goaf) use the protection table and protection cover close to the fire source. When it is difficult to achieve effect on the inlet side of the fire, local counter-wind can be adopted to extinguish the fire from the return side, but the inlet side should be set up a water curtain and the personnel should be withdrawn. Effective methods must be taken to prevent the gush and accumulation of gas in goaf when the return air lane of coal face is on fire. If the above methods are ineffective, isolation methods and comprehensive methods should be adopted to extinguish the fire.

(8) Fire in a single end roadway. When a fire occurs in a single-end roadway, it is necessary to actively extinguish the fire while maintaining the normal ventilation of the local fan. It is necessary to maintain the ventilation status quo of the single-head roadway, that is, do not open the fan when it stops running, do not blindly stop the fan when it is opened, and take measures after reconnaissance.