(1) General measures for mine fire prevention

1, all mine ground buildings, coal pile, waste dump, timber yard and other fire safety measures and systems should be established.

2. Prevent fire smoke from entering the well. The distance between the waste rock and the timber yard from the wind well shall not be less than 80 meters, and there shall be no fireworks or heating in the furnace within 20 meters near the wellhead room and the ventilation machine room.

3, into the wind wellhead installation of fireproof iron doors.

4. A fire material library should be installed near the wellhead and at each production level of the bottom hole yard or the main transportation lane.

5. The fire pool is set on the ground, and the fire pipeline system is set up underground.

6. Non-combustible building materials are used in wellhead rooms and derricks.

7. It is strictly forbidden to use bulbs for heating and electric furnaces.

8. Frequently check the aging of the high and low voltage cables in the underground, the damage and the explosion of electrical equipment, to prevent the fire caused by the aging, damage and explosion of electrical equipment. The underground substation must be equipped with enough fire extinguishers. And enough fire fighting tools and equipment such as fire extinguishing sand.

9. Prevent mechanical friction due to fire.

10. Prevent blasting due to fire.

11. Use non-combustible or non-combustible products as much as possible in the well.

(2) Preventive measures for external fires

1. Prevent the open flame from igniting. Electric welding, gas welding and torch welding shall not be carried out in underground and wellhead rooms. If the above operations must be carried out underground, safety measures must be established each time, and approved by the mine leader.

2, to prevent uncontrolled high temperature heat source ignition

(1) Prevent the accidental ignition of electrical equipment. The selection, installation and use of all electrical equipment in the underground must comply with relevant regulations and correctly use overload relays and fuses.

(2) Prevent mechanical friction from igniting fire, install mechanical equipment well, check and repair frequently, and ensure that the equipment does not operate with disease.

(3) Prevent blasting and fire, and prohibit open flames.

3, using non-combustible material support, all roadways in the underground are supported by non-combustible materials.

(3) Preventive measures for spontaneous combustion of coal

1. Mining technical measures

(1) Select a reasonable coal pillar size and keep the coal pillar as little as possible.

(2) Select the backward mining sequence to increase the recovery rate.

(3) Improve the mining speed, collect the coal in the working face during the spontaneous combustion period, and close the gob in time.

(4) Select a reasonable ventilation system. To prevent air leakage, the main fan is matched with the wind network, and the ventilation facilities are arranged reasonably and the quality is reliable.

2, using inert gas fire

Prevent coal from spontaneous combustion.

3. Partial filling of roadway

In some areas of the roadway, such as the gang, the roof, and the crushed section of the coal pillar, the closed wall is constructed by using wood, red brick, mortar and other materials, and then filled with sand, loess or mud in the wall.

Second, mine fire extinguishing measures

(1) Measures taken in the event of a fire

1. The person who first discovered the fire tried to clarify the fire situation, took all possible methods to directly extinguish the fire, controlled the fire, and quickly reported to the dispatching room.

2. After receiving the fire report, the dispatching room immediately informs the relevant personnel to organize the personnel in the disaster-stricken area and implement the fire-fighting plan to evacuate all personnel who may be threatened by the fire.

3. After receiving the fire report, the mine leader immediately set up a disaster relief headquarters headed by the mine manager, adjusted the wind flow control fire, organized personnel to investigate the fire area, determine the fire source, and decisively decided on the fire extinguishing plan and organized the implementation.

4. Personnel in hazardous areas should obey the leaders and follow the evacuation route specified by the disaster prevention plan in an orderly manner to evacuate the dangerous areas in an orderly manner.

5. Adopt the corresponding airflow control method to control the wind flow and meet the following requirements

(1) Effectively control the fire to prevent the expansion of the disaster

(2) Create conditions that are close to fire and take direct fire

(3), will not cause gas accumulation and coal dust flying

(4), prevention and control of wind pressure caused by wind pressure reversal

6. Disaster avoidance lines for mine fires

When a fire occurs in the underground mining face: 05 working face→transportation alley→track alley→contact lane→5#甩车车→副斜井井→ground safety location. When there is a fire in the underground working face: 03 transportation, the working face of the tunnel, the transportation lane, the transportation lane and the corridor of the track, the roadway, the 5#甩车场→ the auxiliary deviated well→the ground safety location

(2) Fire fighting methods

1, direct fire

Extinguish with water

(1) In the case of clear fire source (non-electric equipment and oil fires), the fire is not large, the roof of the fire extinguishing site is stable, the ventilation system is normal, and the wind passage is unimpeded.

(2) Measures taken by water fire extinguishing:

1. Turn off the power before extinguishing the fire.

2. Firefighters stand on the windward side to prevent harmful gases from hurting people.

3. Ensure sufficient water.

4. Maintain normal ventilation, and the inspectors check the gas content at any time on site.

Extinguish with sand or rock powder

1. When the electrical equipment is on fire, the power should be cut off first.

2. When electrical equipment fires and oil fires occur, use sand or rock powder to spread directly on the fire source.

Excavate the fire source and extinguish the fire directly

1. In the early stage of the fire, the fire range is not large, no gas accumulation, no coal dust explosion risk.

2. Before excavating the fire source, first spray it with pressurized water, and then dig it out after the fire source is cooled.

3. The inspector can check the gas concentration and air temperature at any time on the spot. When the gas concentration does not exceed 1%, the temperature can be excavated when the temperature is not high.

Use a fire extinguisher to extinguish

Rehabilitation drills for underground employees ensure that all well-industry personnel are familiar with the use and storage location of fire extinguishers.

2, closed fire

When the mine fire cannot be extinguished by direct method, use a firewall to tightly seal the fire source or the ignition area and cut off the air source in the fire area.

3, joint fire

In order to make mine fire fighting work quickly and effectively, fire fighting is usually carried out by means of joint fire extinguishing method. That is, while using a firewall to isolate fire extinguishing, a method of injecting inert gas (nitrogen) into the fire zone is used to extinguish the fire. By injecting nitrogen gas, the oxygen concentration is lowered, and the fire source is lowered. temperature.

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