Technical measures for safety of continuous ventil

2022-07-24
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Safety technical measures for air connection in coal mining face according to the production situation of coal mining face, it is urgent to arrange and prepare the replacement face. However, in the ventilation system, the heading face is connected with the mining face. At present, an independent ventilation system has not been formed. According to the coal mine safety regulations, the number of series ventilation shall not exceed once. In order to ensure the safety production during the series ventilation period, The following safety technical measures are specially formulated and strictly implemented during construction

I. ventilation management

1. When exhaust air cascades into the mining face at the heading face, sufficient air volume must be ensured in the air distribution requirements of the mining face. The return air after the air used in the heading face enters the air flow of the mining face. The bearing period and CO2 concentration must be below 0.5%. Other harmful gases shall comply with the requirements of the coal mine safety regulations

2. Strengthen the management of ventilation facilities and reduce the air leakage of air valve. In the air flow entering the mining face, an automatic gas detection alarm power-off instrument must be installed

3. Keep the air inlet and return of the coal mining face with a cross-section of more than 4m2, and keep it unobstructed

4. The wind measuring personnel shall regularly measure the air volume. If there is any change, the principle shall be found out and handled in time

II. Gas management

however, the tension and pressure sensors of many enterprises do not need to issue verification certificates

1. Strengthen the bearing period inspection of the mining face. If there is an increase in gas, it is necessary to find out the causes and deal with them in time

2. The gas content in the coal face shall not exceed 0.5%. In case of exceeding the limit, all operations in the coal face shall be stopped immediately, and then the reason for exceeding the limit shall be found out for treatment

3. A gas monitoring probe shall be installed at the place 10m from the air inlet roadway of the coal mining face to the coal wall at the exit below the mining face, so as to master the gas concentration in the air flow cascading into the mining face at any time. If the probe or the monitoring host gives an alarm when it exceeds the limit, it shall immediately notify the mining face to stop operation, report to the mine leadership and check and deal with it

4. A gas inspection board shall be set at 10m from the lower exit of the mining face. The tile inspector shall write the inspection results on the board every time. When the gas concentration changes, it shall be clear with the mining face operators on duty to take precautions

5. The electrical equipment used in the mining face must be carefully checked and maintained every shift. No explosion or electric leakage is allowed

III. dust prevention management

1. Wet drilling shall be insisted during excavation to reduce dust flying

2. The upper and lower roadways of the mining face shall carefully implement the dust cleaning system, at least once a month to prevent dust accumulation. Spray dust reduction is carried out in the air inlet roadway of the coal mining face to purify the air flow

3. It is necessary to insist on washing the coal side before shooting, and watering must be done after shooting to reduce dust

4. Water spraying (sprinkling) device shall be set at the transfer site to maintain normal spray sprinkling

5. Operators shall do a good job in individual dust-proof vulnerable parts 3: electromechanical

IV. electromechanical management

1. Electromechanical equipment is complete and intact. It is strictly forbidden to use one switch to control multiple electrical equipment

2. When using the fan, the wind power locking device and gas power locking device must be installed, and comprehensive protection is strictly prohibited

3. It is strictly prohibited for electrical equipment to lose explosion, and "chicken claw", "sheep tail" and "open joint" shall be eliminated

4. The safety facilities, signals, shields and remote control switches of the chute must be complete and reliable

5. All cables shall be free of skin damage and leakage, otherwise they shall be replaced immediately

6. It is strictly prohibited for maintenance workers to work with electricity, and personnel irrelevant to mechanical and electrical maintenance are not allowed to operate mechanical and electrical equipment at will

7. The cable must be hung neatly, and the cable hook must be used when hanging. It is strictly prohibited to use iron wire. The cables laid in the whole roadway shall not be drenched by water, and it is strictly prohibited to hang objects on any cable

8. It is strictly prohibited to put oily objects, explosives and detonators near electromechanical equipment

9. All mobile mechanical and electrical equipment and maintenance electrical equipment must be powered off first, and a special person shall be assigned to take care of them or hang the sign of "no power transmission for maintenance"

10. All kinds of mechanical and electrical equipment of coal mining haulage roadway must be inspected regularly, and problems found shall be handled in time

11. There are no sundries within 10m around the front and back of the electromechanical equipment, and all of them are put on the shelves

12. Frequently check whether the switch is out of explosion and whether the cable is broken and leaked

13. The cable shall be replaced immediately for treatment; In case of fever, find out the cause in time and handle it

14. When the switch trips, the electrician shall find out the cause and restore power transmission. No other person shall deal with it without authorization

15. Strengthen the maintenance of mechanical and electrical equipment, make the equipment intact rate reach more than 90%, and eliminate the phenomenon of explosion loss

16. The equipment that has not passed the acceptance of the mechanical and electrical department shall not be used in the well, and the downhole equipment shall not be operated without inspection

v. shooting management

1. Shooting must be carried out by full-time shooters with certificates. The shooters must be equipped with whistles, detonator boxes and explosive boxes

2. Explosives and detonators shall be stored separately in special explosive boxes and locked. It is strictly forbidden to throw or place it at random. The explosive box must be placed where the top plate is intact and the mechanical and electrical equipment are avoided. During each shooting, the explosive box must be placed in a safe place outside the warning line

3. When extracting a single electric detonator from a bundle of electric detonators, do not pull the foot wire hard to pull the tube body. The bundled electric detonators should be straightened, and the front foot wire should be pulled out. After extracting a single electric detonator, the end of the foot wire must be twisted

4. It is not allowed to carry explosives without bags. It is strictly prohibited to carry detonators and take a mine car or transport detonator boxes with a mine car. It is not allowed to throw explosives and detonators randomly during the shift. Excess detonators and explosives after the shift shall be returned to the explosive magazine

5. The gunner must assemble the primer near the place where there is no electrical equipment, no conductive line, the roof is stable, the support is intact, and the electrical equipment and conductor are avoided. It is strictly prohibited to sit on the explosive box to assemble the primer. The introduced chemicals and explosives shall be stacked separately

6. The electric detonator must be protected from vibration and impact during the assembly of drug introduction. The electric detonator is only allowed to be installed from the top of the drug roll. It is not allowed to use the electric detonator to replace the bamboo or wooden stick

7. After the electric detonator is inserted into the cartridge, the cartridge shall be wrapped with a foot wire to fix the electric detonator in the cartridge, and the end of the electric detonator pipeline must be twisted

8. Before shooting, the switch, cable, tools and personnel shall be evacuated to a safe place, the warning shall be set, and the shooting signal shall be sent out. Shooting can be carried out after five seconds

9. The blasting bus and power cable must be hung separately. The charging shall be carried out according to the detonator model of the charge specified in the blasting chart. Blasting without blasting mud is strictly prohibited

10. Before charging, the ponding and dust in the blast hole must be washed away. A wooden gun stick shall be used for charging, and the roll shall be gently put into the eye fundus without collision; After charging, the electric detonator pin line must be suspended in the air. It is strictly prohibited for the electric detonator pin line and blasting bus to contact with the transport equipment, electrical equipment, mining machinery and other conductors

11. If the shooting does not sound, the blasting line must be removed from the detonator and twisted with each other. Remove the key 70 ~ 94hr15n and wait 15 minutes before head-on inspection

12. Water cannon mud shall be used as cannon mud, and the remaining blast holes outside the water cannon mud shall be sealed with clay. When the hole depth is less than 0.6m, charging and blasting are not allowed. In shallow hole blasting, it can be less than 0.6m, but the blasting mud must be fully sealed. When the blast hole depth is 0.6--1.0m, the sealing mud length shall not be less than 1/2 of the blast hole depth. When the blast hole depth exceeds 1m, the sealing mud length shall not be less than 0.5m. When the blast hole depth exceeds 2.5m, the sealing mud length shall not be less than 1.0m. During smooth blasting, the surrounding holes shall be sealed with blasting mud, and the length of sealing mud shall not be less than 0.3m

13. After shooting, stop for 15 minutes, and then enter the head-on after the smoke is blown away. When entering the head-on, first knock on the top, find out the dangerous rocks and live stones, and deal with the misfire as required

14. Blasting is not allowed when the gas content in the air flow within 20m of the head-on reaches 1%. When the gas content reaches 1.5%, the work shall be stopped, the power supply shall be cut off, and the personnel shall be evacuated for treatment

15. Before shooting, the team leader must personally assign special personnel to set up warning signs on all roads that may enter the shooting site. Before shooting, the team leader must count the number of people and issue an order only after confirmation. The length of blasting busbar shall not be less than 70m from the turning roadway and 100m from the straight roadway

16. Strictly implement the system of "one shot, three inspections" and "three person interlocking shooting"

17. Only explosion-proof blaster is allowed to be used for the blaster. It is strictly prohibited to use electric power or miner's lamp for blasting. The blaster and key shall be carried by the blaster

18. The shooter must leave the shooting site at last and shoot at a safe place with cover

19. Before blasting, blasting is not allowed without checking the gas content by the tile inspector

VI. transportation management

1. First cut off the power supply and check the top plate, support and other conditions. Make clear the positive and negative running directions. After pinching the tail, press the column. If it is necessary to slip due to work, then carry out the test run. If there is no problem, it can be used

2. It is forbidden to pull backward, take people, pull up gangue, transport explosives and detonators, and it is forbidden to use the chute to transport pillars, hinged top beams, I-beams, wood, etc

3. The facilities of each part of the chute are complete, the signal is sensitive, the pressure column is firm, and the button is not available

4. If the chute and equipment are transported by the chute, the spare materials in the chute section shall be stacked neatly. There shall be a sidewalk at least 0.7m wide on one side of the chute, which shall be placed flat and stably. A specially assigned person shall follow the materials outside the chute behind the chute equipment, pay close attention to the operation of the chute and materials, and stop the chute immediately in case of any abnormality

5. After hearing the start signal of the chute, the chute driver can start the chute. When opening the chute, the driver should concentrate, stop for a while, and stop the chute in time if problems are found

6. Use the chute to transport materials. When the chute is started, one chute can only transport one material. It is strictly prohibited to transport multiple materials at the same time. It is strictly prohibited for other parallel operations and miscellaneous personnel to stay in the chute section. When materials pass through the chute, the chute shall be stopped and transported manually

7. When materials go up and down the hill on the chute, no one is allowed to go up and down the hill. The personnel transporting materials shall be behind the materials and shall not stand in front of them to prevent materials from hurting people

8. Do not stand on the chute when manually operating materials. When transporting materials on the working face, personnel shall go up and down from the non machine lane

VII. Strictly follow the coal mine safety regulations and operation regulations for various types of work. Other matters not covered herein shall be handled in accordance with the operating procedures

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