Safety technical measures for the construction of double shaft main hoist rope in a well

I. Overview:

XXX XX coal mine shaft with dual canned JKMD-4 × 4-Z floor mounted Friction a hoist, main hoist rope model: Ф40-6T * 6 mixed layer 28, singlet 6.71Kg / m, 2014 Hanging rope in June. Due to the elongation of the double-can wire rope of the XX well, it is now necessary to carry out the reins. In order to ensure construction safety, the following safety technical measures are specially formulated:

Second, overhaul organization:

The construction of the auxiliary wellbore is responsible for the construction, the construction in charge is XX, and the construction safety officer is XXX.

Third, construction preparation:

1. Organize construction technicians to go to the site in advance, understand the site conditions, determine the construction plan and prepare construction safety technical measures;

2. Prepare construction tools and materials, such as wire rope buckles, shackles, chain hoists, pressure oil pumps, wire rope cards, pneumatic wrenches, large plates, etc.

3. Measure each main hoisting rope to adjust the length, and use red lacquer to mark the corresponding position on the main rope side of each main hoisting rope main rope.

4. Before the construction, the oil pump will be connected to the power supply at the wellhead, and the normal configuration of the oil pipe and joints will be adjusted;

5. Send a special person to carry out a comprehensive inspection of all kinds of tools and materials used in the construction, and then use them to ensure their safety and reliability. If there is any problem, report to the team leader in time and deal with it.

Fourth, the construction steps:

1. The construction personnel first prepare the construction pneumatic wrench, chain hoist, wire rope buckle, shackle, large plate and other tools in the appropriate position of the wellhead.

2. The construction personnel stand on the top of the double tank main hook tank, and slowly lift it. On the north side of the fourth layer of the frame beam, a 3 ton chain hoist is hung, and the position is located between 1# and 3#; A 3 ton chain hoist is hung on the frame beam, and the position is located between 2# and 4#, respectively.

3. Two 2 ton chain hoists are hung on the south and north sides of the third layer of the frame beam above the wellhead. The positions are located between 1#, 2#, 3# and 4# for the pressure relief suspension. To prevent the cylinder from collapsing when the pressure is released.

4. Drop the main tank of the double tank to the appropriate position, and the suspension device of the first rope is slightly lower than the wellhead.

5, the position of the wellhead platform erection of temporary construction with 70mm large board, the board and the jacket, banding solid iron bifilar # 10 wire between the large plate and the large plate.

6, put the double tank main hook down about 17m, stop the hook. The construction personnel placed a 2t chain hoist on the south and north sides of the set up column, and used the chain hoist to set a group of 1# and 2# main ropes, and the 3# and 4# main ropes were respectively pulled and closely attached to each other. Y-40 steel wire ropes are used together, and 8 sets of steel wire rope cards are arranged on each main rope, and the distance between the rope cards is 200mm. After the jam, remove the chain hoist.

7. Lift the main hook 6m at a speed of 0.5m/s and stop the hook. The card has a pair of long board to prevent the wire rope from being twisted.

8. Lift the double-tank main hook to stop the first rope suspension device under the temporary construction platform to facilitate the construction position.

9. The person at the top of the tank will connect the pump oil pipe to the suspension five-way pipe, open the main valve and press it until a suspension cylinder reaches the head and stop pressing.

10. At the sub-rope head of the suspension device with the cylinder extended to the head, a Φ15.5mm steel wire rope buckle is arranged with the wire rope card, and the 3 ton chain hoist is firmly connected, and then the auxiliary rope board is removed by the pneumatic wrench. Two 2 ton chain hoists are hung on the lifting rings on the south and north sides of the suspension wedge device.

11. Close the other three suspension cylinder valves and automatically depressurize the cylinders that reach the head until the cylinders cannot be automatically retracted. At this time, the main rope is slack.

12, from the 2T chain hoist, keep the chain hoist slightly energetic, to prevent the wedge device from sagging and hurting people. The construction staff used a sledgehammer and a scorpion to loosen the heart of the hanging chicken. When the heart of the chicken was loosened until the heart was exposed, a steel pipe of half a meter length (the steel pipe must be provided with a reverse rope) was passed through the heart of the chicken to prevent the rope from being loose. The heart of the chicken falls into the wellbore.

13, 3T chain hoist will tighten the slack main rope, while pulling up 2 tons of chain hoists, to prevent the suspension cylinder from dumping after dumping, so that the heart is appropriate to maintain the appropriate degree of tightness.

14. After the main rope is tightened and the cylinder stroke is extended to the minimum position, the steel pipe is taken out, the secondary rope is tightly tightened, and the auxiliary rope head board is suspended, and the connection with the chain hoist is released.

15. Pressurize the suspension cylinder that received the position, and loosen the 2 ton chain hoist. After the main rope is energized, the 2 ton chain hoist is released.

16. Press the receiving cylinder of the receiving position to tighten the main rope and open the other three cylinder valves to rebalance the four suspensions.

17. Use the same method to suppress, depressurize, tighten, press, and rebalance, and reel the four main ropes one by one.

18. If the amount of reins does not meet the requirements after one cycle, repeat the cycle according to this scheme until the amount of reins meets the requirements.

19. After leaving the rich secondary rope head for a length of two meters, the rest will be cut off, and the secondary rope head will be tied firmly with 12# wire to prevent loosening of the flowers, and the main and auxiliary ropes will be stuck with a polyurethane rope card.

20. After the reins are over, remove all temporary facilities and check the tools in the opposite steps. Then, after running empty for several times without any problem, you can carry out the normal tick.

Five, safety precautions:

1. All job types must be certified, and strictly follow the post and safety responsibility system, abide by the “two norms” and other relevant rules and regulations. It is strictly forbidden to drink and discomfort, and non-professional or undocumented personnel are strictly prohibited from participating in the construction. .

2. Any construction personnel who participate in this construction shall be familiar with the construction contents and carry out construction according to the construction measures.

3. All participating construction workers must wear a full range of labor insurance products when entering the site. The safety belt must be fastened within 1 meter of the wellhead and the heightening work must be carried out in a safe and reliable place.

4. During the construction period, the signal transmission should be clear and accurate. The signal connection must be carried out by the person in charge of the construction, and the person in charge of the construction should be responsible for the command. When parking and starting the rope construction, the wellhead signal must be photographed to prevent misoperation. .

5. Warning signs should be set within 10m above and below the wellhead. Non-workers are strictly prohibited from entering the construction site, and the accumulation of debris and other debris above the wellhead casing are cleaned before construction.

6. During the construction period, the vice captain of the winch team and the above personnel should be on-site.

7. The tools required for construction must be provided with a staying rope. The ropes are reliably rooted and must be handed over. It is strictly forbidden to discard them at random.

8. After the temporary construction platform of the wellhead construction is completed, it must be inspected and confirmed by the construction responsible person before construction. During the construction process, care should be taken to prevent the bumping of the suspension or the wedge device from colliding with the construction platform.

9. During the operation of the chain hoist, the construction manager must conduct the command.

10. When the pressure hose is disassembled, the operator must wear goggles and stand on the side of the nozzle, and the nozzle is strictly forbidden.

11. It is strictly forbidden to cross the upper and lower operations, and the signal workers will set the warning within 10m of the upper and lower mouths.

12. When playing the sledgehammer, check the firmness of the hammer head and the hammer handle in advance. The hammering personnel should stand in the position, hold the hammer handle, pay attention to other people around, and prohibit wearing gloves, hands or hammers to pour the oil. .

13. After hanging the chain hoist for lifting, you need to use 10# wire to make the hook head firmly rooted to prevent the hoist from falling off.

14. When licking the heart of the chicken, the steel pipe should be inserted in time to prevent the heart from slipping.

15. When disassembling and installing the secondary rope card and the main rope card, it should be placed and taken well to prevent falling and loss.

16. When the remaining rope is cut off, it is strictly forbidden to rush or rush the main rope to prevent damage to the main rope, and a special person is responsible for sprinkling water. Before the rope is pulled out of the wellbore, it is strictly forbidden to connect with the chain hoist.

17. It is strictly forbidden to remove wind, water and hydraulic lines with pressure.

18. When the pneumatic wrench is not used, the shut-off valve should be closed, and the wrench should be started to remove the residual wind pressure in the pipeline.

19. When removing the wire rope card, the wire rope must be used to carry the rope with the chain hoist to prevent the rope from collapsing.

20. The operator must carefully study this safety technical measure, put an end to the illegal operation, and do a good job of signing the work.

21. When conducting electrical welding operations, the safety technical measures for the construction of electric welding operations of XXX wells shall be strictly implemented.

22. Unfinished matters shall be implemented in accordance with the “Safety Regulations for Coal Mines” and relevant safety management regulations.

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