Safety control measures for front work and anti-chip safety of fully mechanized mining face

1. Strictly implement the system of knocking and helping. When personnel enter the coal side to carry out work, they must arrange the operation of more than 2 people, and designate one person (experienced old worker) to monitor the safety of the roof and coal gang at a reliable support location, and use steel of not less than 2.5m. Brazing, picking coal from the coal gang and the frame, and picking up the coal. If there is an abnormal situation, a signal will be sent immediately, and the staff will stop the operation and withdraw to a safe place.

2. Before the personnel enter the coal face of the working face, all the shearer drums must be dropped to the bottom plate, and the console electrician is notified to cut off the power of the shearer and the scraper conveyor from the combination switch. No construction personnel personally informs that no power is allowed. And the construction personnel lock the shearer and the scraper conveyor, and the working surface communication is locked at not less than two places. When the personnel enters the loader to help the operation, the loader and the crusher must be de-energized and locked, and the lock button should be no less than 2, and the system of stopping the power transmission should be strictly implemented.

3. Before entering the coal side, personnel must carefully check the support situation of the five supports before and after the operation site and the operation site to ensure that the telescopic beam is completely shot out, the bracket is raised and raised, and the first-level secondary guard plate is close to the coal wall, and then The section of the bracket inlet shut-off valve is closed, the PM31 red latching key rotates 900 to lock the bracket, and assigns a special person to watch the bracket latching, and other personnel are not allowed to work or stay in the bracket.

4. The coal mining machine stops at the low mining height and the roof is in good condition. When the coal washing machine is inspected, the coal machine locker scraper button must be pressed to lock the scraper.

5, the solution to the lock must adhere to the "who is locked, who unlocks" principle, other personnel are strictly prohibited to unlock. It is strictly forbidden for any person to open the lock button of the shearer, bracket, scraper conveyor, isolation valve of the shut-off valve or combination switch.

Second, safety technical measures before the work

1. When handing over the shift, the support worker and the coal cleaner must carefully check the integrity of the protective net between the brackets. If damage is found, repair or replace it in time.

3. Before the personnel go to the front of the bracket and before entering the coal side, the support must be carefully checked at the working place and the support position of the five brackets before and after the work site to ensure that the telescopic beam is completely shot out, the bracket is raised and raised, and the first level secondary guard plate Close to the coal wall, then the section of the bracket into the liquid shut-off valve to close, assigned a special person to watch the bracket lock, other personnel must not work or stay in the bracket.

4. Stop and observe the coal wall. After the coal wall is stable, enter the work area, and strictly perform the knocking on the top pillar to clean up the coal-burning activity between the frames.

5. During the operation, there must be a special person to monitor the coal gang, the bracket lock, the coal in the rack and the large coal on the scraper conveyor above the working place. If the abnormality is found, the operator will be notified immediately to withdraw into the bracket.

6. When cleaning the large coal in the cable trough, all the protective slabs in the working area must be opened, and the coal smashing between the racks should be picked up. The special person should guard the coal wall slabs and the leakage between the racks.

7. When the working place is less than 30m away from the shearer, the shearer must be shut down after the power is shut down for operation.

8. The front bracket is pulled out of the area, and it is strictly forbidden to work in front of the staff.

9. The bracket protection net must be restored in time after the operation.

Third, anti-chip help security technical measures

1. All operators should always observe the support conditions and coal wall conditions of the return air alley, the upper transport lane and the working face, and strictly prevent the coal wall slabs and slag from hurting people. Empty top work is strictly prohibited.

2. Strictly implement the “knocking and asking top” system, and use the long handle tool (2.5m) to wake up the wind and wake up the wind and the roof of the upper lane. It is strictly forbidden to move or stand in the middle or below of the coal to handle the coal. No one shall dismantle or knock the pallets of the returning wind lanes and the upper lanes at will, to prevent the pallets from falling and loosening, causing the two lanes to help.

3, upper and lower lane has been delamination and spalling of the lot must first sign a long tool to dispose of refuse wake up, and then promptly laid a metal net, playing up anchor for maintenance.

4, the back of the wind back lane, the upper board of the upper lane can be recycled in advance. If the two lanes are serious, the pallets in the backwind lane and the upper lanes of Shangyun Lane will not be recycled.

5. Strengthen the quality management of the working face project to ensure that the coal wall and the support of the working face are kept straight, preventing the local concentration of pressure from causing the gangs and roofs.

6. When the coal mining machine cuts coal, there shall be no other personnel working outside the cable trough below the front drum and 5m above the rear drum except for the driver of the coal mining machine, in order to prevent the coal from the sheet smashing out of the cable trough.

7. When cleaning the coal head triangle mouth, first stop and lock the scraper conveyor and the transfer machine, observe the top plate, and then enter the operation area to clean coal. All personnel are strictly prohibited from working and resting in unsafe locations.

8. When the coal wall or roof of the upper and lower ends of the safety exit is loose, cracked or other abnormal phenomena, it must be treated in time to ensure safety.

9. When the coal mining machine cuts coal, the 2 to 4 front drums of the coal mining machine are delayed to move in time, and the frame must be lowered and pulled quickly. The top plate crushing place must be advanced to the top with the pressure shifting frame. After the bracket is moved, the top beam is tightly connected, and the first-level guard plate of the bracket is hit in time to prevent the piece from hurting the person. 2 to 4 drums are shot.

10. When the coal mining machine cuts coal, only 2 to 3 of the front rollers are allowed to be retracted, and the coal wall is only allowed to take over the front of the protective panel.

11. The length and maximum protruding part of the working surface shall not exceed the safety standard standard. When the length of the umbrella is more than 1m, the maximum protruding part shall not exceed 150mm; when the length of the umbrella is less than 1m, the maximum protruding part shall not exceed 200mm. To prevent the umbrella from falling off and hurting people.

12. The driver of the shearer should strictly control the speed of the shearer. According to the roof and coal wall of the working face, the coal cutting speed of the shearer can be adjusted at any time.

13. Working face clear coal workers shall not carry out coal cleaning work during the coal cutting process (when the coal machine goes down and ascends). If there is a large coal blockage, the coal wall and the support of the working place must be supported before the operation. The inspection can be carried out under the premise that it is determined that the bracket is moved in place and the guard panel is fully opened. During the operation, it is often observed that there is a large piece of coal on the inclined upper scraper conveyor that slides down on the cable trough. If it is found that the operator and the squad leader before the bracket are notified in time, and the machine is stopped, the operation can be continued after the treatment is completed.

14. The working face piece will help the serious section, and the team leader must arrange 2 people to work. One person observed the coal wall and worked alone. If the coal wall is found to have signs of gangs during the cleaning process, the observer must promptly notify the operator to stop the operation and immediately evacuate into the bracket.

15. Large coal falls between the bracket and the cable trough. When the frame is obstructed, the telescopic beam must be extended first, the bracket is tightened, the top beam is tightly connected, and then the guard plate is punched. Under the supervision of a special person, the hammer is used for crushing, and at the same time, one bracket is locked at the left and right of the working place.

16. All operators must stand in the bracket walkway. Do not walk between the bracket and the cable trough.

17. The working face bracket should ensure sufficient initial support force, the bracket does not leak liquid, does not simmer, does not automatically unload, and the top beam should be raised and tightened after the bracket is raised. It is strictly forbidden to have floating rafts, coal blocks, etc. in the upper part of the top beam of the lifting bracket.

18. If the top surface of the working face is broken or the end distance of the support beam exceeds the specified limit, the front frame shall be taken in time or the telescopic beam and the guard plate shall be taken in time; if the roof is broken and easy to fall, it shall be immediately after the coal cutter cuts the coal. Wipe the top or move the frame.

19. After the large piece of coal under the working surface is taken out by the scraper, it is strictly forbidden for the personnel to enter the scraper for processing. It is strictly forbidden to use the unit rocker arm or the bracket guard plate to break the large coal to prevent damage to the equipment or cause other ACCIDENT.

20. Each class of the foreman and the safety supervisor shall conduct a patrol inspection of the working face. When it is found that there is a piece of dangerous situation, it is necessary to promptly notify other personnel on the working face to pay attention. It is strictly forbidden to pass alone or close to a dangerous place.

21. When the maintenance workshop is to repair the working surface equipment or replace the bracket guard plate and the large unit:

(1) The coal mining machine must be opened to the working surface with the top plate intact and the coal wall piece not serious. Power off and lock the shearer and scraper conveyor, and open the shearer disconnector and clutch.

(2) Manually relying on the old sleepers or logs with a diameter of not less than 160mm (the length is determined according to the site conditions) on the coal wall, and the support working bracket will drive the guard panels to make the sleepers between the coal wall and the guard plates, and lock them. 10 brackets at the front and rear of the work site and a special person (stent worker) to take care of them. After confirming that there is no problem, they can enter the coal wall side for maintenance work.

(3) Before the operation, firstly, the top of the knockout is asked to remove the coal and the live rock from the coal wall and the top plate, and the safety is confirmed and carried out under the condition of the guarded roof and the coal gang.

(4) When the personnel enter the coal side operation, the provisions of “Safety Technical Measures for Personnel Entering Coal Side Operation” shall be implemented.

(5) After the maintenance work is completed, the person in charge of the on-site construction checks the roof and coal wall near the working place, and after confirming that there is no problem, notify the bracket worker to release the bracket lock, take back the guard panel, take out the sleeper, and then shoot the bracket guard panel. , protect the coal help.

22. Workmen must wear helmets and safety glasses during the production process (except for the front-end operators of the two lanes).

23. Others strictly enforce the provisions of the “Code for Coal Mining Operation in Fully Mechanized Mining Faces”.

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