Mine blasting and coal dust explosion safety technical measures and emergency rescue

Safety measures at coal mine blast

(1) The parameters such as the depth, angle, spacing and charge of the blasthole should meet the design requirements.

(2) It is necessary to carry out the charging according to the requirements, and to install the actual, the blasthole sealing mud should be applied with water cannon mud, and the remaining blasthole part outside the water cannon mud should be sealed with clay . It is strictly forbidden to use pulverized coal, block materials or other flammable materials in the blasthole seal. No guns or false blastholes are strictly prohibited. Exposed blasting is strictly prohibited.

(3) Explosives and detonators shall use the permitted explosives and detonators of the coal mines, and shall use the permitted explosives and detonators of the corresponding grades according to the mine gas grade. For mining and excavation work, it is necessary to use the three-level coal mine permitted explosives and the coal mine allowable detonators. When using the mine to allow millisecond electric detonators, the extension of the last paragraph shall not exceed 130 milliseconds.

(4) Ensure that the quality of explosives and detonators is qualified. The explosive materials used must have safety signs for coal mine products. Electric detonators produced by different manufacturers or of different varieties shall not be blended.

(5) It is necessary to deal with the artillery guns according to the regulations. The handling of the artillery guns (including the residual guns) must be carried out under the direct guidance of the team leader and handled in accordance with the regulations. The guns should be processed on duty. If the shift is not completed, the gunner must be handed over to the next batch of gunners on the spot.

(6) Establish and improve the management system, and implement the management system to be strict. It is necessary to implement the “one shot and three inspections” (before, before, after, and after the guns) system and the “three-person chain guns” (gunners, team leaders, and inspectors). The system is strictly forbidden to put a cannon, open fire, and a single shot.

(7) It is necessary to set up a full-time gunner, and the blaster shall be a full-time blaster.

(8) The gunners must be trained and obtain the corresponding qualification certificates.

(9) Explosives must be used for underground blasting, and the explosive device must be mine-proof and ensure that the blasting equipment is qualified. The detonator must be managed in a unified manner. The performance parameters of the detonator must be regularly verified and the performance of the explosion-proof performance checked. It is strictly forbidden to use if it does not meet the requirements.

(10) When shooting, it is necessary to take vigilance measures according to the provisions of the “Working Regulations” or measures in the lanes and surfaces.

(11) The mining and excavation working face adopts millisecond blasting. In the excavation working face, the full section must be detonated once. When the mining face needs to be blasted, the safety technical measures must be reported separately after approval.

(12) Abnormal conditions are found in the blasthole. If the temperature is suddenly high, there is a significant gas swell, the coal is loose, and the old air is not allowed to be used.

(13) blasting bus, and tightening the foot line with each other and must be suspended, not the same track, a metal pipe, conductor wire rope, and the like in contact with the scraper conveyor.

(14) Within 20m of the shooting position, if there are mine cars, uncleared coal, sputum or other objects blocking more than 1/3 of the roadway, it is not allowed to charge and release the gun.

(15) The blasting operation must prepare the blasting operation instructions, and the blasting machine must perform the blasting operation according to the instructions.

(16) Explosive materials that have expired or are seriously deteriorated shall not be used. Explosive materials that cannot be used and that have not been blasted after the shift has not been used or the drug is required to be blasted must be promptly returned to the explosive materials store.

(17) The blaster must separately store the explosives and electric detonators in a special explosive material box and lock them; it is strictly forbidden to throw or throw them. The explosive material box must be placed in a location where the top plate is intact, the bracket is intact, and the machinery and electrical equipment are avoided. The explosive material box must be placed in a safe place outside the warning line during blasting.

(18) When extracting a single electric detonator from a bundle of electric detonators, do not pull the tube hard to smash the tube, or pull the tube hard to rub the foot line, the bundled electric detonator should be smooth, pull the front end The foot line pulls out the electric detonator. After a single electric detonator is withdrawn, its foot line must be twisted into a short circuit.

(19) When assembling the explosive charge, the following provisions must be observed:

1. Must be carried out near the blasting site where the top plate is intact, the bracket is complete, and electrical equipment and electrical conductors are avoided. It is strictly forbidden to sit on the explosive material box and assemble the explosive charge. The number of assembled explosive charges is limited to the amount required at the time.

2. Assembly of the explosive charge must prevent the electric detonator from being subjected to vibration, impact, breaking the foot line and damaging the insulation of the foot line.

3. The electric detonator must be loaded from the top of the medicine roll. It is strictly forbidden to use electric detonators instead of bamboo and wooden sticks. The electric detonator must be fully inserted into the medicine roll. It is strictly forbidden to insert the electric detonator obliquely in the middle of the medicine roll or on the medicine roll.

4. After the electric detonator is inserted into the medicine roll, the medicine thread must be wrapped with the foot line and the electric detonator line is twisted into a short circuit.

(20) Before charging, firstly, the pulverized coal or rock powder in the blasthole must be removed, and then the wooden or bamboo gun can be used to gently push the medicine roll without rushing or tamping. Each of the medicine rolls in the blasthole must be in close contact with each other.

(21) After charging, the electric detonator foot line must be suspended, and the electric detonator foot line and the blasting bus line are strictly prohibited from contacting with electrical conductors such as transportation equipment, electrical equipment and mining machinery.

(22) The depth of the blasthole and the length of the bonnet shall meet the following requirements:

1. When the depth of the blasthole is less than 0.6m, it shall not be charged or blasted; under special conditions, such as bottoming, brushing, and topping, it is necessary to establish safety measures. The depth of the blasthole may be less than 0.6m, but it must be Covered with mud.

2. When the depth of the blasthole is 0.6~lm, the length of the sealing mud shall not be less than 1/2 of the depth of the blasthole.

3. When the depth of the blasthole exceeds lm, the length of the sealing mud shall not be less than 0.5m.

4. When the depth of the blasthole exceeds 2.5m, the length of the sealing mud shall not be less than 1m.

5. When the surface is blasted, the surrounding light blasting eye should be sealed with gun mud, and the length of the sealing mud should not be less than 0.3m.

6. When there are two or more free faces on the working face, the minimum resistance line in the coal seam shall not be less than 0.5m, and the minimum resistance line in the rock formation shall not be less than 0.3m. When the shallow-eye charge blasts large rock blocks, the minimum resistance line and the length of the sealing mud shall not be less than 0.3m.

(23) When handling coal or sputum in the eyes of coal (矸), if there is no way other than blasting, it can be blasted, but the following regulations must be observed:

1. It is necessary to use the coal mine for the coal mine product safety mark for the use of the coal mine (矸) eye to allow rigid explosives or coal mine permitted explosives not lower than the safety level.

2. Only one coal mine electric detonator shall be allowed for each blasting, and the maximum charge shall not exceed 200g.

3. Before blasting, it is necessary to check the gas in the upper and lower spaces of the blockage in the eye of the coal.

4. Sprinkle water before blasting.

(24) The top control distance of the mining face must comply with the provisions of the operating procedures. If the bracket is damaged, or the umbrella is over the specified time, it is strictly prohibited to charge or blast.

(25) The blasting busbars and connecting lines shall meet the following requirements:

1. Coal mine underground blasting busbars must meet the standards.

2. The joints between the blasting busbar and the connecting line, the electric detonator and the connecting line, the footing and the footing must be twisted and hung with each other, and must not be associated with rails, metal pipes, metal mesh, wire rope, scraper conveyor, etc. The electrical conductors are in contact.

3. The blasting busbar and cables, wires and signal wires shall be hung on both sides of the roadway. If it must be hung on the same side, the blasting busbar must be hung under the cable and should be kept at a distance of more than 0.3m.

4. Only single-circuit blasting of insulated busbars is allowed. It is strictly forbidden to use rails, metal pipes, metal mesh, water or earth as loops.

5. Before blasting, the blasting busbar must be twisted into a short circuit.

(26) Before each blasting operation, the blaster must perform a full resistance check on the electric blast network. It is strictly forbidden to use the detonator to extinguish the fire to detect whether the electric blast network is conducting.

(27) The blaster must finally leave the blasting site and must detonate at a safe place. The distance from the location of the detonation to the location of the blast must be specified in the operating procedures.

(28) The blaster and its handles and keys must be carried by the inspector of the station. The blasting work is carried out before the blasting, and the blasting will be carried out after the blasting. The blaster shall not insert the handle or key into the detonator until the blasting is energized.

(29) After the blast, the handle or key must be pulled out immediately, the busbar is removed and the cable is twisted into a short circuit.

(30) Before the blasting, the connection work of the foot line, the connection of the blasting busbar, the inspection of the line and the energization work shall be allowed only by the blaster.

(31) Before the blast, the inspector must check the number of people, the dispatching room confirms that all the warnings are in place, the personnel are evacuated, the power range of the warning area has been stopped, and the tile inspector reports the gas inspection and is below 0.8%. The on-site inspector issued a detonation order.

(32) After receiving the detonation order, the blaster must first issue a blasting siren, at least another 5 seconds before detonation.

(33) The blasthole of the charge should be blasted. Under special circumstances, when there is a blasthole on the shift that has not been blasted, the blaster on duty must be handed over to the next blaster at the scene.

(34) After blasting, after the time specified in the operating procedures, the blaster, gas inspector and team leader must first inspect the blasting site to check ventilation, gas, coal dust, roof, bracket, refusal, residual Waiting for the situation. In case of danger, measures must be taken immediately.

(35) When rejecting the explosion after power-on, the blaster must first remove the handle or key, and remove the blasting busbar from the power supply, twist it into a short circuit, and wait for a certain period of time (at least 5 minutes when using the instantaneous power generation detonator; use When deferring the electric detonator, wait at least 15 minutes) to check along the line to find out the cause of the explosion.

(36) When dealing with refusal or residual explosion, it must be carried out under the guidance of the team leader and should be completed on duty. If the shift is not completed, the blaster on duty must be handed over to the next blaster at the scene.

(37) When handling a refusal, the following provisions must be observed:

1. Re-explosion due to poor connection, can be re-wired.

2. In addition to the 0.3m away from the blasthole, another new blasthole parallel to the blasthole is re-elected.

3. It is strictly forbidden to use the planer or remove the original placed explosive charge from the blasthole or pull out the electric detonator from the primer. It is strictly forbidden to continue to deepen the bottom of the blasthole with or without residual explosives; it is strictly forbidden to use the method of eye-catching to smear out the medicine; it is strictly forbidden to use the pressure wind to blow the blasthole.

4. After handling the explosion of the blasthole, the blaster must inspect the bombed coal and helium in detail and collect the unexploded electric detonator.

5. It is strictly forbidden to perform work unrelated to the treatment of refusal at the location before the blasting treatment is completed.

(38) Explosion materials and explosive materials shall be distributed within 30m of the diverticulum, and blasting shall be strictly prohibited.

Special emergency plan for coal mine dust explosion accident

1 Type of accident and degree of hazard analysis

According to the test report of the Comprehensive Testing Center of the Shanxi Coal Industry Bureau, there is a risk of explosion of coal dust in No. 1 coal seam in the mine field.

Coal dust is a kind of tiny coal particles that can be suspended in the mining space during the production process. Coal dust with a particle size below 1mm is suspended in the air and may burn or even explode in case of fire. Compared with gas explosion, coal dust explosion has the characteristics of large energy generation, long burning time and high CO generation, so the consequences and harms are also the most serious. Coal dust explosions are mainly related to the following factors:

(1) Coal dust is explosive. Explosive coal dust can float in the air and reach a certain concentration. The lower explosion limit is 45g/m3, the upper line is 1500～2000 g/m3, and the most explosive coal. The dust concentration is 300 to 400 g/m3.

(2) The heat source of high temperature, the temperature change of the heat source capable of igniting coal dust explosion is relatively large, and the temperature change is about 610~1050 °C. The high temperature fire source for igniting coal dust is mainly the flame and electric which appear when blasting. Sparks, arcs, electrostatic discharges, impact sparks, high temperature friction, downhole fires, and gas explosions.

(3) The oxygen concentration of the air species is greater than 18%. When less than 18%, the coal dust cannot be exploded, but the mixture of gas and coal dust in the air cannot be completely prevented from exploding.

(4) The measures for mine prevention and isolation of coal dust explosion are not perfect;

(5) The employee's personal protection awareness is not strong, and personal dust-proof or anti-virus labor protection products are not worn during the work;

(6) The dust-proof water supply pipeline system is not perfect;

(7) The dustproof facilities of the mine are not perfect.

2 Basic principles of emergency response:

After a coal dust explosion accident occurs in the underground, rescue workers should rescue and rescue the disaster according to the principle of “emergency relief, proper evacuation, safe evacuation, and priority for saving people”.

(1) In order to rescue the victims, it is necessary to have all the lanes to enter, in line with the principle of “the first to die after the living, the first serious injury, the first easy and the later difficult”.

(2) When entering the disaster area, carry a dry powder fire extinguisher and find that the fire source is extinguished in time. If it is confirmed that there is no fire source in the disaster area and no longer causes another explosion, the roadway in the disaster area can be ventilated. The original ventilation system should be restored as soon as possible, and the air volume should be increased to eliminate the smoke and toxic and harmful gases generated after the explosion. The rapid elimination of these gases is beneficial to rescue the victims, reduce the degree of poisoning of the victims, and eliminate the threat to other people in the well.

(3) Eliminate the blockage of the roadway to save people.

(4) Find the source of fire and put out the fire caused by the explosion.

(5) Do a good job in reconnaissance in the disaster area, look for explosion points, and close the disaster area.

3 Organization and responsibilities

3.1 Emergency organization system

The coal-dust explosion accident emergency organization system is mainly composed of the enterprise emergency rescue command department, the enterprise emergency rescue command office and the on-site emergency command department. The members of the enterprise emergency rescue command are mainly composed of personnel from the departments of ventilation, electromechanical and safety supervision, and the mine manager. The chief engineer is composed.

3.2 Command organization and responsibilities

3.2.1 Enterprise Emergency Rescue Command and Responsibilities

When a coal dust explosion accident occurs in a coal mine, the accident should be handled in a timely and effective manner with reference to the setting of the command organization of the comprehensive plan. After the coal dust explosion accident, the mine chief, chief engineer and other leaders must immediately rush to the disaster relief command site to organize the rescue. The mine manager is the full authority commander responsible for handling the disaster accident. Before the mine manager arrived, the head of the shift was in charge.

3.2.2 Emergency Rescue Command Office and Responsibilities

The Emergency Rescue Command Office of the Enterprise Emergency Rescue Command is responsible for the specific work of the Emergency Rescue Command. The office is located in the mine dispatching room. The director is concurrently appointed by the mine manager or authorized by the mine manager as the deputy mine manager and chief engineer. The deputy director is the deputy mine manager. The members are composed of the deputy chief engineer and the relevant functional department head.

The main responsibilities of the Emergency Rescue Command Office:

(1) Responsible for the comprehensive coordination and management of the mine emergency rescue command work, and report to the enterprise emergency rescue headquarters in time according to the accident situation and the progress of the rescue work.

(2) Keep in touch with the on-site emergency rescue headquarters and communicate the orders of the enterprise emergency rescue headquarters.

(3) Mobilize mine emergency rescue forces and deploy mine emergency rescue resources.

(4) Provide technical support, organize the mine emergency rescue technical team to participate in rescue work, and coordinate mine medical rescue work.

(5) Call the basic information and information of mine emergency rescue.

(6) When the coal dust explosion accident is expanded or the rescue force and resources in the professional field are insufficient, the relevant rescue forces and equipment reinforcements shall be coordinated.

(7) Complete other matters assigned by the Enterprise Emergency Rescue Command.

3.2.3 On-site emergency rescue headquarters and duties

Combined with the actual situation of coal dust explosion, the on-site emergency rescue headquarters can set up five disaster relief teams:

(1) Communication power supply main fan group

1Familiar with the various power supply lines in the underground, and draw the power supply system diagram of each substation.

2 Ensure that the underground communication is smooth, and maintain normal contact in the event of a coal dust explosion.

3 According to the command of the mine, if necessary, the main fan will be counter-winded.

(2) Ventilation group

1 Responsible for daily ventilation system management to ensure that the ventilation system is reasonable, stable and reliable.

2 Organize the necessary ventilation projects, organize the emission of harmful gases from coal dust explosions, and perform other measures related to ventilation.

3 Improve the necessary local anti-wind facilities to ensure that local areas can be partially defensive.

(3) Safe evacuation group

1 Responsible for the orderly evacuation to the safe place to the ground according to the requirements of the command, count the number of people, etc., and report in time.

2 Require the units to push the power, main and auxiliary fan feed switches to zero position and lock before retreating, and close the water supply valve.

(4) Logistics Support Group

1 Supply the required materials and equipment, and the quality and quantity are in place.

2 Responsible for the accommodation and accommodation of rescue workers.

(5) Security team

1 Participate in the whole process of rescue and disaster relief, according to the approved operational plan for handling accidents, deploy inspection personnel, check the implementation process of all aspects and measures of the operational plan, ensure the safe and successful completion of the operational plan, and find that the unsafe factors have the right to stop and Propose safe and reliable remedial measures, report to the enterprise emergency rescue headquarters in time, and listen to instructions.

2 Responsible for the security and security work in the process of accident rescue and treatment, maintain the normal order of the mining area, not allow random personnel to enter the mine, and set up special personnel to guard the vicinity of the wellhead. It is strictly forbidden to stay and watch the crowds, and there is no fire source near the wellhead.

4 Prevention and early warning

4.1 Hazard Source Monitoring

4.1.1 Measures for reducing dust

In the process of mine production and construction, minimizing dust or reducing the amount of floating dust in the air is a basic measure to prevent coal dust accidents and reduce the occurrence of occupational diseases. The following measures should be taken:

(1) Ventilation and dustproof. Ventilation is an effective measure to dilute and eliminate suspended dust in the workplace. The appropriate dust-discharge wind speed is 1.5-2 m/s. If the wind speed is too high, it is easy to blow up the dust; if the wind speed is too low, the dust cannot be taken out of the mining space.

(2) Regularly remove dust. The "Safety Regulations for Coal Mines" stipulates that the floating coal in the roadway must be removed in time to clean or flush the deposited coal dust.

(3) Wet drilling. Wet drilling is to use a wet coal electric drill to drill holes in the coal seam. It has good water sealing performance and can effectively control the coal dust in the mining face and the coal seam heading face.

(4) Watering and dustproof. Sprinkler and dust are water dust deposited on coal, rock piles, roadway walls, brackets, etc. In this way, when the coal is shipped or subjected to high wind, the dust is not easily blown up. Automatic sprinklers should be provided for locations and equipment where dust is generated.

(5) Spray capture of floating dust. Spray at the various transfer points in the well; release the gun to accelerate the floating dust, or use the dust-proof water pipe to flush the roadway from the outside to the inside, and flush the roadway to the working surface before the work surface is released. Thereby achieving the purpose of dust reduction.

(6) Use blister mud. The water cannon mud is a plastic bag filled with water. It can be used to replace the clay cannon into the blasthole. It can reduce the flame and cool down. The heat of the blasting can vaporize the water to form water vapor, and the dust can be reduced from the surface.

(7) The airflow purification water curtain is installed in the return airway of the mining face.

4.1.2 Prevent the occurrence of detonation fire

(1) It is strictly forbidden to bring tobacco and fire to the downhole. It is strictly forbidden to use electric furnace and use bulb to warm the well. When electric welding, gas welding and torch welding are required underground, the relevant provisions of the Regulations should be strictly observed.

(2) Strictly implement the shooting system. The blasting workers must be certified to work. The blasting operation should strictly implement the "one gun and three inspections" system. It is strictly forbidden to put the cannons. It is strictly forbidden to use the open fire to shoot the guns and the one-time charge to release the guns. Electric detonators and explosives must be used in accordance with the provisions of the Regulations. It is strictly forbidden to use unqualified or deteriorated and expired explosives.

(3) Prevent electrical sparks and static sparks. When inspecting electrical equipment and facilities downhole, it is necessary to check the gas first, and it is strictly forbidden to carry out electricity.

(4) Prevent friction and impact sparks. The main measures are: installation of overheat protection device and temperature detection alarm power-off device on the device with friction and heat; when the working surface encounters hard stone or iron sulfide interlayer, it cannot be forcibly cut and should be treated by gun; regular inspection of the pick and its The rear water spray device ensures that it works properly.

4.1.3 Measures to isolate coal dust explosion

A detonation water shed is set up in the entrance and exit wind tunnel. The explosion-proof facility refers to a safety facility for isolating the spread of coal dust explosion in the proper location of the coal seam with the risk of coal dust explosion. Its role is to prevent coal dust near the site where gas or coal dust explosion has occurred from participating in the explosion, so that the explosion cannot continue and expand.

4.2 Early warning action

The main source of danger of coal mine dust explosion is coal dust and high temperature heat source. The necessary conditions for coal dust explosion are:

(1) Coal dust itself is explosive, (I mine coal dust is explosive, the explosion index is 18.10).

(2) Coal dust is suspended in the air to a certain concentration of 45-2000g/m3.

(3) The temperature at which the detonation is performed is 700-800 °C.

(4) The oxygen concentration is not less than 18%.

Under normal mine conditions, the oxygen concentration is satisfactory. As long as the coal dust reaches a certain concentration and has a detonating heat source, there is a possibility of explosion. Therefore, it is necessary to strengthen the monitoring of coal dust. To avoid the occurrence of an explosion.

5 Information reporting procedures

After receiving the coal dust explosion accident report, the mine dispatching room immediately reported the accident profile to the shifting mine manager and reported it to the mine rescue team, mine manager and mine technical leader according to the instructions of the shifting mine manager. The contents of the report mainly include: the time and place of the accident; the initial cause of the accident; the measures already taken; the situation of the personnel on site, the casualties and evacuation (number, degree, affiliated unit).

6 Emergency treatment

6.1 Response Rating

After receiving the coal dust explosion accident report, the dispatching room immediately notified the duty supervisor. The duty supervisor informed the enterprise emergency rescue command team members to immediately gather in the dispatching room according to the specific situation. The chief commander decides whether to start the emergency plan and initiate which level of emergency plan.

(1) In the event of a particularly serious casualty accident, more than 30 people were trapped in the disaster area after the accident, which may have caused more than 30 deaths and was a Class I response.

(2) In the event of a major casualty accident, more than 10 people and 29 people were trapped in the disaster area after the accident. It has caused or may have killed more than 10 people and 29 people, which is a Class II response.

(3) In the event of a major casualty accident, that is, more than 3 people and less than 10 people are trapped in the disaster area after the accident, 3-9 people have been or will be killed, which is a Class III response.

(4) In the event of a general casualty accident, that is, one or more people and three or more people trapped in the disaster area after the accident, the death of three or more people has been or will be caused, and it is a Class IV response.

6.2 Response procedure

After the coal mine dust explosion accident occurred, the mine dispatching room is the responsible unit for issuing the early warning notice. When the dispatching room receives the report of the coal dust explosion accident in the underground, immediately evacuate the personnel in the disaster area and stop the power supply in the disaster area, and notify the mine chief, chief engineer and other relevant personnel in the order specified in the mine emergency plan. The relevant personnel immediately go to the emergency rescue headquarters. The office reported, convened the mine rescue brigade, set up an on-site emergency rescue command, sent rescuers into the disaster area to detect disasters and rescue people, and the on-site emergency rescue headquarters formulated disaster relief plans. The rescue team carried out disaster relief work until the disasters were cleared and normal production resumed.

6.3 Disposal measures

After a coal dust explosion accident, the coal mining enterprise shall take effective measures in time to prevent the accident from further expanding. The following measures can be taken:

(1) After the accident, the personnel in the disaster area shall immediately take measures of self-rescue and mutual rescue. The personnel located in the disaster area shall first evacuate the disaster area as soon as possible, and the personnel not involved in the area shall also evacuate in time after receiving the notice. During the disaster avoidance, the victims were quickly evacuated from the danger zone along the evacuation route under the leadership of the ambulance personnel. During the evacuation process, at least two people should help each other in an orderly manner, and they should not run into the evacuation room and send a distress signal. So that the disaster relief personnel found that when retreating, they should try their best to take shortcuts into the fresh area.

(2) Restore the original ventilation system as soon as possible, increase the air volume, and eliminate the smoke and toxic and harmful gases generated after the gas dust explosion. If a local site explosion occurs, the personnel of the affected area should be stopped immediately, and the affected personnel should be quickly arranged to withdraw into the airflow. If conditions permit, the mechanical and electrical personnel should be immediately organized to install a fan, flushing harmful gases, creating a rescue environment and providing disaster victims. Fresh air to minimize the level of casualties.

At the same time, when handling coal dust accidents, the following should be noted:

(1) Ask about the nature, cause, location and occurrence of the accident.

(2) Cut off the power to the disaster area.

(3) When entering the disaster area, first check the gas components carefully, and then enter the disaster area when there is no danger of explosion.

(4) When an open flame or other combustible material is found to be ignited during reconnaissance, it shall be extinguished immediately to prevent a secondary explosion.

(5) When there is an open flame, the action of the rescuers should be light, so as not to raise the coal dust and cause a coal dust explosion.

(6) When the rescue team passes through the bracket to destroy the area or land in the blocked area, temporary support should be set up to ensure the safety of the team members at these places.

7 Emergency protection

7.1 Emergency Material Protection

In accordance with the requirements of the Disaster Prevention and Treatment Plan, the enterprise shall establish and improve the fire protection materials library for the uphole and underground mines, and reserve local ventilators, water pumps, air ducts, water pipes, fire extinguishing equipment, construction materials (such as stone, red brick, cement, yellow sand). Wait for necessary disaster relief equipment, materials, etc.

7.2 Emergency Equipment Support

Mine rescue and medical rescue equipment are equipped with special police lights and sirens. After a safety production accident, the local government is requested to coordinate the traffic control of the accident in time, and set up an emergency rescue special passage to maximize the time for rescue and disaster relief.

At the same time, a basic emergency communication system combining wired and wireless is established, and corresponding communication equipment is provided.

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