Methods and techniques for moving hydraulic supports in coal mines

Hydraulic support workers must master eight operating essentials when operating, to be fast, even, sufficient, upright, straight, stable, strict and clean.

Moving operations

1. Before moving the rack, open the liquid inlet valve of the rack;

2. Before moving the rack, the floating coal, floating gangue and other debris in the rack must be cleaned, otherwise the move is not allowed.

3. Before moving the rack, you must check the condition of the top plate. If you find that the top plate is broken or there are strips popping off the roof, you must deal with it before moving the rack to prevent injuries caused by excessive roofing during the rack moving process. Human accident;

4. Before moving the rack, check whether there are cables, liquid pipes and other equipment in front. If any equipment is clean before moving the rack; if it cannot be cleaned in time, mark the rack and wait until the machine is shut down. Then proceed to full processing.

5. When operating the side guards, you must lower the frame to make the top beam leave the top plate before operating the side guards;

6. When moving the frame, lower the column first to allow the top beam to lift. After the beam leaves the top plate, stop lowering the column and move the frame quickly; for broken roof plates, it is allowed to "move the frame by rubbing the top" or "moving the frame with pressure"; when the metal mesh is moved down, the top beam should be separated from the metal mesh to avoid tearing the mesh; < /p>

7. After moving the racks, they must be arranged neatly to form a straight line;

8. After the front and rear beams are connected, adjust the balance jack appropriately to achieve the best support effect of the brackets;< /p>

9. Follow the order of the operating procedures to move the frame, and perform multi-point tensioning if necessary;

10. When the pressure on the front beam is high, in order to avoid the base from sinking when moving the frame, it is necessary to Lift the bottom and move forward.

Pushing the working surface scraper conveyor

1. The scraper conveyor must be pushed in a timely and correct manner. The scraper conveyor must be in a straight line after being pushed;

2. The floating coal at the nose and tail of the machine must be cleaned up and thoroughly to prevent insufficient movement or damage to the equipment due to floating coal at the nose and tail;

3. When the scraper conveyor stops running, it is not allowed to Operate to prevent the chain from being too tight; (except the machine head and tail)

4. The operating position must be accurate and stable when moving, and pay attention to the curvature of the scraper conveyor;

5. If the resistance is too high and the scraper conveyor cannot be pushed when moving, the reason should be found out before moving to avoid damaging the equipment;

6. When moving, the moving method must be determined according to the coal mining method, and cannot be determined by Push the scraper conveyor at both ends to prevent bites caused by arching;

7. When pushing the scraper conveyor, you must pay attention to the front of the pushing jack to prevent the cables, liquid pipes and other equipment from being squeezed;

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8. When moving the head of the scraper conveyor, you must notify the driver of the scraper conveyor before moving the scraper conveyor;

9. After completing the movement of the head and tail, End supports must be provided as required.

Operation and maintenance precautions

1. The components, piping system and auxiliary equipment of the bracket must meet the original design requirements and must not be dismantled or modified at will;

2. When cleaning large pieces of coal, gangue and debris from the coal gang, the following steps must be followed;

3. First lock the scraper conveyor on the working surface, and at the same time centrally control the operators and lock the scraper The conveyor is on standby to prevent others from starting the conveyor without authorization;

4. The guard board can only be extended when the staff is not close to the coal gang and confirm that there are no people and other obstacles;

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5. Strictly implement the system of knocking and asking questions, dispose of gangue and large pieces of coal at the work site, and work can only be carried out when someone is observing the roof and coal;

6. When working within 5 meters of the front and rear drums of the shearer, the power supply of the shearer must be cut off;

7. When working at the head of the machine, in addition to locking the scraper conveyor, the transfer machine and Crusher;

8. Operation of supports passing through geological structures such as faults: Before moving the supports, the mining height should be strictly controlled according to the measures to prevent the supports from being crushed and pay attention to the smooth transition of adjacent support heights;

9. When raising the bracket, you should pay attention to the position of the side guards to prevent damage;

p>11. After the shearer cuts the coal, the bracket should be supported immediately. The distance from the rear drum of the shearer should not be more than 3-6 meters. For areas with severe roof fractures and coal wall fragmentation, the bracket can be stretched ahead. After moving the bracket, it must be extended Remove the guard board and support the coal wall;

12. During operation, the reasonable support height of the bracket should be grasped;

13. If there is a large amount of gangue on the roof, after moving the If the roof cannot be connected well, the gangue should be removed;

14. When overhauling and handling the hydraulic system, the stop valve must be closed and the bracket being repaired must be isolated to completely release the pressure at the repaired part. Only after confirmation is correct. Carry out the work;

15. Main pipeline maintenance must notify the pump station to stop the pump and take locking measures. At the same time, the front pressure stop valve at the fault location should be closed, and the correct method should be used to release the pressure. Work can only be carried out after the inspection is correct. ;

16. When a control valve fails or malfunctions, the cause must be carefully searched, the fault must be eliminated promptly, and no uncertain work is allowed to prevent damage to personnel and equipment;

17. When lowering the rack, if any problems with the top plate or other problems are found, tighten the bracket immediately and lower the rack again after proper handling;

18. It is strictly forbidden to use iron wire instead of the "U" pin. Insert the single-leg pin;

19. The eight-character guideline of operating the bracket should be: "fast, straight, sufficient, even, flat, clean, strict and tight".

That is:

1. Various operations must be fast;

2. The speed of moving the rack must be uniform;

3. Moving the rack The step distance must comply with the regulations of the operating procedures;

4. The brackets must be in a straight position without snapping;

5. Each group of brackets should be aligned in a straight line;

6. The brackets and scraper conveyors must be stable and reliable;

7. The roof beam and the roof plate must be in tight contact without leaving any gaps;

8. Coal, gangue, and coal dust must be cleaned .