One. general provisions for maintenance:
1. The maintenance center or workshop should be equipped with professional technicians.
2. The repaired pillars shall have inspection certificates.
3. In addition to the three-use valve, the long pipe, the top cover and the unloading device can be replaced underground, the pillar repair should generally be carried out in the ground maintenance workshop or maintenance center.
4. Each mine should be equipped with maintenance workers according to the amount of pillars, generally one person per 300 pillars.
5. The repaired pillar shall be inspected in accordance with the relevant provisions of this code. Any pillar with unqualified performance indicators shall not be allowed to go down the well.
6. The maintenance personnel shall undergo strict training to fully understand the mechanism, inspection, use and performance of the pillar, fault causes and treatment methods, etc. Only those who have been assessed can be certified to work.
7. The maintenance center or workshop should be set up on the maintenance card to record in detail the number of each pillar, the date of maintenance, the date of downhole, the date of uphole, the fault repair, the repairman, the inspection status, the contents of maintenance, etc.
Two. Routine maintenance:
1. Daily breakdown or daily damaged support should be repaired in time.
2. Whether or not the internal injection prop is damaged, the ventilator should be cleaned to replenish the hydraulic oil.
3. The lifting pillar shall be tested for operation and high and low pressure sealing, to check whether there is any damage or failure of the pillar, as well as the cause and fault location, etc.
4. Daily maintenance is mainly to replace damaged parts, replace and clean banana seals, etc.
